Gas and Flame Detection Systems

Features Detectors-Transmitters for Flammable, Toxic Gases and Oxygen Non-intrusive operation via intrinsically safe infrared remote control Remote versions available XP, IS Integrated relays Direct link, 4-20 mA, loop and isolated sensor mode Unique advantages providing the solution you need Design advantages Pre-calibrated sensors for detection of: combustible gases: LEL catalytic and IR toxic gases oxygen Alarms 2 integrated gas alarms with relays 1 fault alarm with relay Inputs Series 80 sensors have up to 9 glands dedicated to cable wiring Design advantages: The minimum configuration includes: 1 electrical input dedicated to a sensor. two 4-20 mA or binary inputs. This configuration allows any other sensor from the network to be recognized (e.g temperature sensor, emergency stop, flame detector, smoke detector). Outputs 4/20 mA with smart signal processing analog signal 4-20 mA data signals between 0 and 4 - 20 and 25mA The transmitted signal, between 0 and 3.2 mA and above 20 mA, can be processed to interpret and identify a wide range of trouble parameters such as: line faults, sensor faults, embedded electronics faults, ambiguity resolution, inhibition of calibration, maintenance call (initial drift or drift over time). RS485 (1200 bauds, 38kb Modbus ASCII for MX 62). The RS485 link gives access to : - sensor measurement - status and default - internal relay management Relays The relays are 2A / 250 VAC type with potential free SPDT contacts. Two types of relays: 2 gas alarm relays or supplementary inputs 1 fault relay The relays are actuated either directly by the sensor electronics or supplementary inputs, or from the MX62 central unit or the control system to which the sensor is connected. The relays can be in safety mode or not, triggered on increasing or decreasing alarms, manually* or automatically acknowledged. * By remote control, by pressing an external pushbutton connected to the dedicated binary input, by acknowledging on the MX 62 unit or the control system to which the sensor is connected. Alarms 2 integrated gas alarms with relays 1 fault alarm with relay Technical advantages Stand-alone central unit For relay control, the OLCT 80 can operate as a standalone unit: an indisputable advantage in a classified explosion risk zone. Flexibility of connection modes OLCT 80 sensors can be connected either: in loop (opto-isolated - up to 16 sensors), 4-20 mA, under direct power and operate as a central unit. Operation traceability The operator can check records locally for the most recent time-date stamped events. Communication Remote dialogue with the sensor using IR remote control. Measurement power supply redundancy Independent ports allow a redundant connection to the measurement unit. Low power requirements The leading edge technology used in the OLCT80 transmitter makes it very energy efficient. This major advantage means that more sensors can be connected, with smaller wire cross-sections and over greater distances. Logistic advantages Loop arrangement The transmitter is perfectly adapted to mounting and connection to the digital fieldbus loop of the MX 62 unit. Supporting 1 to 3 digital addresses: the sensor block (detection element), the two 4-20 mA auxiliary inputs. Certification The OLCT80 Series is certified to the specifications required by standards EN 50054, 45544 and 50104 (environmental standards, explosive and toxic gases and oxygen) and to the specifications of standards EN 50270, EN 6052 (electromagnetic compatibility, ingress protection). OLCT 80 uses digital logic and software technologies. The sensors are protected and in compliance with the specifications of standard EN 51271: analog and digital values track each other homogeneity of digital resolution and response time with the specifications required internal self-diagnostics Configuration Options Stand Alone Version Standard Version Stand Alone Version Specifications Type Transmitter-sensor Detected gases Explosive, toxic and oxygen Detection principles Catalytic, Electrochemical, IR, Semiconductor Sensor block Pre-calibrated Device Aluminium enclosure and stainless steel 316Lfor sensor housing Visualisation 4-digit LCD display for measurement and one alphanumeric line for texts, Pictograms - backlighting 4 indicator lamps : one green : "OperationOK", one yellow : "Fault", red : "Alarm 1" and "Alarm 2" Power supply From 16 to 28 VDC at transmitter entry Maximum power with digital link - 0.2 W (electrochemical cell) - 1.3 W ( catalytic / SM ) with I output at 25 mA - 0.9 W (electrochemical cell) - 2 W ( catalytic / SM ) with I output at 25 mA and relays activated - 2.4 W (electrochemical cell) - 3.5 W ( catalytic / SM ) Power supply to sensor terminals Two independent inputs : 16 to 28 VDC (catalytic / IR / SM cells) 12 to 28 VDC (electrochemical cell) Inputs Two analog inputs 4-20 mA (load resistance 120 Ω, can be used as binary) Signal outputs Logic (relay contacts) Relay Analog Standardised 4-20 mA output Digital Two independent opto-isolated RS 485 ports Signal faults I < 0.5 mA Alarms 2 programmable thresholds per channel Relays Type SPDT Number 3 Contact RCT changer-over Breaking capacity 2A / 250 VAC / 30 VDC Wiring / connection Basic version, 6 inputs : 4 M20 and 2 M25 On request : 3 additional, 2 M20 and 1 M25 Load resistance on the 4-20 mA 500 Ω Loop resistance Under central unit 21 VDC: 128 ohms ( electrochemical cell ) - 32 Ω ( catalytic / SM ) - 16 Ω (IR) Protection number IP 66 Operating temperatures - 20 °C to + 60 °C ( electronics, see table for detection cells ) Dimensions See drawings Weight OLCT 80 : 3,5 kg,        OLCT80 version IR : 5,3 kg   Accessories A Infrared remote control B Tool kit C Bypass adapter D Cover key E Calibration cup F Remote gas introduction device G Gas collector H Splash guard Homologations Certification Atex OLCT 80 d OLCT 80 id ATEX II 2GD ATEX II 2GD Ex d IIC T6...T5 Gb Ex d ia IIC T4 Gb Ex tb IIIC T85°C...T100°C Db Ex tb ia IIIC T135°C Db INERIS 03ATEX0240X INERIS 03ATEX0240X Chine OLCT 80 d OLCT 80 id GYJ17.1201X - Ex d IIC T6/T5 Gb GYJ17.1202X - Ex d ia IIC T4 Gb Electromagnetic compatibility Complies with EN 50270   Product Data Sheet

What is the Oldham Simtronics OPGD-799225?The Oldham Simtronics OPGD-799225 is: Pole Mount (U-Bolt 5 inch). The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration.About the Quasar 900 Open Path Gas Detectors lineThis part is an accessory for the Quasar 900 Open Path Gas Detectors line. The specification below describes the detectors it is used with, not the accessory itself.Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-799225 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-888260-2?The Oldham Simtronics OPGD-888260-2 is: Function Check Filter Alarm Level - Propane Calibration. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration.About the Quasar 900 Open Path Gas Detectors lineThis part is an accessory for the Quasar 900 Open Path Gas Detectors line. The specification below describes the detectors it is used with, not the accessory itself.Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-888260-2 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-888260-5?The Oldham Simtronics OPGD-888260-5 is: Function Check Filter Warning Level - Ethylene Calibration. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration.About the Quasar 900 Open Path Gas Detectors lineThis part is an accessory for the Quasar 900 Open Path Gas Detectors line. The specification below describes the detectors it is used with, not the accessory itself.Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-888260-5 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-888270?The Oldham Simtronics OPGD-888270 is: Tilt Mount (Stainless steel). The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration. The Quasar 900 Open Path Gas Detectors group in the 2026 price book lists 27 orderable part numbers, and this one is the stainless steel build.What are the specifications of the Quasar 900 Open Path Gas Detectors?Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-888270 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-901-F-111?The Oldham Simtronics OPGD-901-F-111 is: Quasar 901, 7-20 m, FM, M25. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration. The Quasar 900 Open Path Gas Detectors group in the 2026 price book lists 27 orderable part numbers, and ordered against FM approval.What are the specifications of the Quasar 900 Open Path Gas Detectors?Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-901-F-111 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-902-C-212?The Oldham Simtronics OPGD-902-C-212 is: Quasar 902, 15-40 m, ATEX, ¾ NPT. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration. The Quasar 900 Open Path Gas Detectors group in the 2026 price book lists 27 orderable part numbers, and ordered against ATEX approval.What are the specifications of the Quasar 900 Open Path Gas Detectors?Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-902-C-212 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-903-C-311?The Oldham Simtronics OPGD-903-C-311 is: Quasar 903, 35-100 m, ATEX, M25. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration. The Quasar 900 Open Path Gas Detectors group in the 2026 price book lists 27 orderable part numbers, and ordered against ATEX approval.What are the specifications of the Quasar 900 Open Path Gas Detectors?Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-903-C-311 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-903-F-312?The Oldham Simtronics OPGD-903-F-312 is: Quasar 903, 35-100 m, FM, ¾ NPT. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration. The Quasar 900 Open Path Gas Detectors group in the 2026 price book lists 27 orderable part numbers, and ordered against FM approval.What are the specifications of the Quasar 900 Open Path Gas Detectors?Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-903-F-312 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics OPGD-904-F-411?The Oldham Simtronics OPGD-904-F-411 is: Quasar 904, 80-200 m, FM, M25. The SafEye Quasar 900 is an open path infrared detector for combustible gases. It works as an infrared transmitter and a receiver separated by 4 to 200 metres, measuring how much radiation the gas along that path absorbs and comparing it with the background absorption of the atmosphere. A single path can replace up to 20 point detectors. The unit is built for harsh sites: stainless steel construction, heated optics, IP66 and IP68 protection to NEMA 250 6P, and it keeps working through up to 95 percent obscuration caused by dust, fog, rain, snow or vibration. The Quasar 900 Open Path Gas Detectors group in the 2026 price book lists 27 orderable part numbers, and ordered against FM approval.What are the specifications of the Quasar 900 Open Path Gas Detectors?Detection method: open path infrared absorption across a transmitter and receiver pairGases detected: combustible gasesDetection range up to 200 metres, from 4 metres minimum separationTolerates up to 95 percent obscuration from dust, fog, rain, snow or vibrationOutputs: 4-20 mA, HART, RS485 Modbus RTU, plus built-in relaysPower supply 18 to 32 V DCHeated optics and stainless steel construction, IP66 and IP68, NEMA 250 6PSIL 2 certified by TUV RheinlandCertifications: CE, ATEX, IECEx, FMWhat should you check before ordering?The commercial case for an open path unit is the count it displaces: one Quasar 900 path covers ground that would otherwise need up to 20 point detectors, each with its own installation, cabling and test schedule. Response is under 3 seconds, with T90 under 10 seconds, and the published MTBF is a minimum of 100,000 hours, so a single path is a monitored point rather than a device that quietly stops answering. The housing is tested to MIL-STD-810C for humidity, salt fog, vibration and mechanical shock. Range is fixed by the model ordered rather than configured on site, and the four models in the 2026 price book step through 7-20 m, 15-40 m, 35-100 m and 80-200 m.How do the part numbers differ?Model number carries the range: Quasar 901 covers 7 to 20 m, 902 covers 15 to 40 m, 903 covers 35 to 100 m and 904 covers 80 to 200 m, each offered with ATEX or FM approval and with M25 or 3/4 inch NPT entries.Where is it used?Typical service: Perimeter monitoring of combustible gas across wide open areas; Replacing a line of point detectors along a process boundary; Sites with dust, fog, rain or snow that attenuate an optical path; Onshore and offshore hydrocarbon installations.How do I order or get a quote?PE Energy supplies the Oldham Simtronics OPGD-904-F-411 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the SafEye Quasar 900 open path combustible gas detector already in our catalogue.

What is the Oldham Simtronics R-5000ALR-2?The Oldham Simtronics R-5000ALR-2 is: Display Module with Relays, Aluminum Enclosure (Use only with 4-20mA Source units). The GD10P and GD10PE are point gas detectors built on non dispersive infrared (NDIR) detection, using a solid state infrared source flashing at 32 Hz across a dual wavelength, dual path optical bench. Because detection is optical rather than chemical, the detector needs no oxygen to measure correctly and works in an inert gas atmosphere, cannot be poisoned by silicon vapours or hydrogen sulphide, is unaffected by gas velocity, and has no saturation effect, so it can read up to 100% volume. Calibration is factory set and no field recalibration is needed. The GD10PE is the version built for critical applications with large volumes of air at high velocity, where low gas concentrations must be caught quickly, such as HVAC and air generator intakes serving inhabited areas and gas turbine installations. The GD10P / GD10PE Point IR Gas Detectors group in the 2026 price book lists 157 orderable part numbers, and this one is the aluminium build, with the 4-20 mA current source output stage.What are the specifications of the GD10P / GD10PE Point IR Gas Detectors?Detection method: infrared absorption, dual wavelength, dual path, with a solid state 32 Hz flash IR sourceGases detected: hydrocarbon gases and carbon dioxide; the target gas and scale are fixed by the ordered part numberAccuracy: plus or minus 3% of full scale between 0 and 50% of reading, plus or minus 5% between 50 and 100%Lifetime stability: plus or minus 5% of full scale readingResponse time: T20 0.7 s, T50 1.7 s, T90 4.0 s (fast option: 0.2 s, 0.4 s, 1.0 s)Start-up 65 s typical; 30 minutes warm up to full specification performanceOutput: 4-20 mA current source as standard, current sink as an option, maximum load impedance 500 ohmContinuous self-test, with dirty optics warning at 55% signal attenuation and dirty optics fault at 70%Suitable for use in SIL 2 and SIL 3 systems, with CSA, IECEx, ATEX and INMETRO approvalsGD10PE variant only: detection range 0-20% LEL (0-1% Vol.) methane; the GD10P target gas and scale are fixed by the ordered part numberWhat should you check before ordering?Teledyne guarantees parts and workmanship for 5 years and the infrared sources for 15 years, which is the figure behind the claim of the longest combined detector and IR source warranty on the market. That warranty is void if parts of unspecified origin are fitted, so a spare bought outside the vendor chain can cost the remaining source cover. The practical consequence of the NDIR bench is maintenance cost rather than performance: no chemical reaction means no poisoning by silicon vapours or hydrogen sulphide, and factory calibration means the detector is not on a recalibration schedule the way a catalytic bead point is.How do the part numbers differ?In this part numbering the output stage is selected by one character: H is the 4-20 mA current source version and J is the current sink version. Every complete description in the 2026 price book follows that rule without exception across 107 rows.Where is it used?Typical service: Fixed point combustible gas monitoring in boiler rooms and process areas; Offshore and onshore petrochemical installations; Inert or oxygen-free atmospheres where catalytic sensors cannot measure; HVAC and air generator intakes serving inhabited areas (GD10PE); High temperature areas of gas turbine installations (GD10PE).How do I order or get a quote?PE Energy supplies the Oldham Simtronics R-5000ALR-2 on a quote basis: send the part number with your application details and we return pricing and lead time. Fixed gas and flame detection is quoted rather than listed because most references ship configured for target gas, range, approval scope and cable entry, and those choices are fixed at the part number. This part belongs to the same product line as the GD10P IR point gas detector already in our catalogue.