Gas and Flame Detection Systems

Presentation The CTX 300 can detect O2, CO2, toxic and refrigerant gases. TELEDYNE Gas & Flame Detection offers a detector version with a wide range of sensors (infrared, electrochemical, semiconductor) according to your application needs. It is also available with or without display. Simplicity Sensor replacement does not require any special menu access. Just replace the sensor without even powering down the transmitter! Reduced maintenance As the only consumable element, the CTX 300 sensor is easily replaceable. New sensors come pre-calibrated from the factory. So during the sensor ex-change, no calibration gas is required, nor adjustments to the detector, or remote central controller are required. FEATURES: Detection of toxic gases or oxygen Interchangeable and pre-calibrated sensor modules Local display (optional) Durable in harsh environments Up to 5 years of life for O2 sensor   PART NUMBER GAS TYPE OF SENSOR RANGE (ppm) OPERATING TEMPERATURE WC3oO2F O2 Electrochimic 30.0 % -20 °C la +50 °C WC30O2G 30.0 % -40 °C to +50 °C WC3AO2G 30.0 % -20 °C to +50 °C WC3oO2S 100 % +5 °C to +40 °C WC3oCOA CO Electrochimic 100 -20 °C to +50 °C WC3oCOB 300 -20 °C to +50 °C WC3oCOC 1000 -20 °C to +50 °C WC3oCOD 1.00 % -20 °C to +50 °C WC3oCO2A CO2 Infrarosu 0.50% (5000ppm) -40 °C to +50 °C WC3oCO2B 5.00 % -40 °C to +50 °C WC3oCO2C 100 % -40 °C to +50 °C WC3oHSA H2S Electrochimic 30.0 -20 °C to +50 °C WC3oHSB 100 -20 °C to +50 °C WC3oHSC 1000 -20 °C to +50 °C WC3oNOA NO Electrochimic 100 -20 °C to +50 °C WC3oNOB 300 -20 °C to +50 °C WC3oNOC 1000 -20 °C to +50 °C WC3oN2A NO2 Electrochimic 10.0 -20 °C to +50 °C WC3oN2B 30.0 -20 °C to +50 °C WC3oSOA SO2 Electrochimic 10.0 -20 °C to +50 °C WC3oSOB 30.0 -20 °C to +50 °C WC3oSOC 30.0 -20 °C to +50 °C WC3oCL2 Cl2 Electrochimic 10.0 -20 °C to +50 °C WC3oH2A H2 Electrochimic 2000 -20 °C to +50 °C WC3oH2B 2 % -20 °C to +50 °C WC3oHLA HCl Electrochimic 30.0 -20 °C to +50 °C WC3oHLB 100 -20 °C to +50 °C WC3oHNA HCN Electrochimic 10.0 -20 °C to +50 °C WC3oHNB 30.0 -20 °C to +50 °C WC3oNH3 NH3 Electrochimic 100 -20 °C to +40 °C WC30NH3F 100 -40 °C to +40 °C WC3oNH1 1000 -20 °C to +40 °C WC30NH1F 1000 -40 °C to +40 °C WC30NH2 5000 -20 °C to +40 °C WC3oOET ETO/PO Electrochimic 30.0 -20 °C to +50 °C WC3oHFA HF Electrochimic 10.0 -10 °C to +30 °C WC3oO3A O3 Electrochimic 1.00 -20 °C to +50 °C WC3oPH3 PH3 Electrochimic 1.00 -20 °C to +50 °C WC3oCLO ClO2 Electrochimic 3.00 -20 °C to +50 °C WC3oCCL COCl2 Electrochimic 1.00 -20 °C to +40 °C CTX300-507 Methylene chloride Semiconductor 500 -20 °C to +55 °C CTX300-508 Methyl chloride Semiconductor 500 -20 °C to +60 °C CTX300-657 Toluene Semiconductor 500 -20 °C to +50 °C CTX300-660 Xylene Semiconductor 500 -20 °C to +55 °C CTX300-656 Ethanol Semiconductor 500 -20 °C to +50 °C CTX300-500 R12 Semiconductor 10000 -20 °C to +55 °C CTX300-501 R22 Semiconductor 2000 -20 °C to +55 °C CTX300-509 R123 Semiconductor 2000 -20 °C to +55 °C CTX300-502 R134a Semiconductor 2000 -20 °C to +55 °C CTX300-505 R11 Semiconductor 10000 -20 °C to +55 °C CTX300-506 R23 Semiconductor 10000 -20 °C to +55 °C CTX300-511 R143a Semiconductor 2000 -20 °C to +55 °C CTX300-521 R245fa Semiconductor 1000 -20 °C to +55 °C CTX300-512 R404a Semiconductor 2000 -20 °C to +55 °C CTX300-513 R507 Semiconductor 2000 -20 °C to +55 °C CTX300-514 R410a Semiconductor 1000 -20 °C to +55 °C CTX300-515 R32 Semiconductor 1000 -20 °C to +55 °C CTX300-525 HFO-1234ze Semiconductor 1000 -20 °C to +55 °C CTX300-662 HFO-1234yf Semiconductor 1000 -20 °C to +55 °C   PART NUMBER ACCURACY (% at PA FULL SCALE) LIFE SPAN (IN MONTHS) T(50) (SECONDS) WC3oO2F +/- 1.5 % 28 10 WC30O2G +/- 1.5 % 60 10 WC3AO2G +/- 1.5 % 60 10 WC3oO2S +/- 1.5 % 36 < 20 WC3oCOA +/- 1.5 % 48 15 WC3oCOB +/- 1.5 % 48 15 WC3oCOC +/- 1.5 % 48 15 WC3oCOD +/- 1.5 % 48 < 20 WC3oCO2A +/- 2 % 60 <20 WC3oCO2B +/- 2 % 60 <20 WC3oCO2C +/- 2 % 60 <20 WC3oHSA +/- 1.5 % 36 15 WC3oHSB +/- 1.5 % 36 15 WC3oHSC +/- 1.5 % 36 15 WC3oNOA +/- 1.5 % 36 15 WC3oNOB +/- 1.5 % 36 15 WC3oNOC +/- 1.5 % 36 15 WC3oN2A +/- 1.5 % 24 20 WC3oN2B +/- 1.5 % 24 20 WC3oSOA +/- 1.5 % 36 15 WC3oSOB +/- 1.5 % 36 15 WC3oSOC +/- 1.5 % 36 15 WC3oCL2 +/- 1.5 % 24 50 WC3oH2A +/- 1.5 % 24 50 WC3oH2B +/- 1.5 % 24 50 WC3oHLA +/- 1.5 % 24 50 WC3oHLB +/- 1.5 % 24 50 WC3oHNA +/- 2 % 18 30 WC3oHNB +/- 2 % 18 30 WC3oNH3 +/- 3 % 24 <20 WC30NH3F +/- 3 % 24 <20 WC3oNH1 +/- 3 % 24 <20 WC30NH1F +/- 3 % 24 - WC30NH2 +/- 3 % 24 <20 WC3oOET +/- 3 % 36 50 WC3oHFA +/- 3 % 12 50 WC3oO3A +/- 3 % 18 40 WC3oPH3 +/- 3 % 12 40 WC3oCLO +/- 2 % 24 50 WC3oCCL +/- 1.5 % 18 50 CTX300-507 +/- 15 % relative to alarm threshold 36 40 CTX300-508 36 40 CTX300-657 36 20 CTX300-660 36 20 CTX300-656 36 20 CTX300-500 36 30 CTX300-501 36 30 CTX300-509 36 30 CTX300-502 36 30 CTX300-505 36 30 CTX300-506 36 30 CTX300-511 36 30 CTX300-521 36 30 CTX300-512 36 30 CTX300-513 36 30 CTX300-514 36 20 CTX300-515 36 20 CTX300-525 36 30 CTX300-662 36 30   Clear readability Highly sensitive, lighted display allows local reading Effective power-up indication by indicator lights Indication of maintenance or fault function by LED High-Level technology Pre-calibrated sensor avoiding the need to use unstable gases on site for calibration purposes High-performance semiconductor type detector (detection of freon gas, etc.) Available in an infrared version for CO2 Advanced design Highly resistant to environmental elements Avoids having to use protective covers Heavy-duty Use of polycarbonate and stainless steel mounting hardware Resistant to corrosive agents (H2S, HCl, sea spray,…) Durable housing Specifically adapted options Removable filters, interchangeable without opening the housing (which is dust-proof, condensation-proof and water resistant) Splash guard Gas collector cone Mounting brackets Pitot tubes, floats, heating protective device, etc. Remote calibration cup Enclosure: Polycarbonate housing Function: 4-20 mA output analog transmitter Display: Highly visible backlight LCD display unit (optional, gas dependent) Indicator lights: In operation: green color: Failure / maintenance: orange color Wiring: 2 wires shielded cable for CTX300 without display 3 wires shielded cable for CTX300 with display Cable entry: M16 cable gland (outer diameter 4 to 10 mm) Power supply: 15 to 32 V DC Maximum Power Consumption: CTX 300 without display unit: 60 mA, CTX 300 with display unit: 110 mA, CTX 300 without display semiconductor versions: 100mA Operating temperature: without display: -40°C to +50°C (-40°F to +122°F), sensor dependent with display: -20°C to +50°C (-4°F to +122°F), sensor dependent Sealing: IP 54, NEMA 3 & 3R Weight: 520 g (18.2 oz) Certification: EMC according to EN 50270:06 CSA CLASS 812 86, CLASS 4812 06 (SIGNAL APPLIANCES) all versions exept CO2 versions Impedance: 32 ohms max loop for CTX 300 with display unit and for semiconductors sensor versions, 64 ohms max loop for CTX 300 without display unit Product Data Sheet

The MultiTox DGi-TT7-E is an intelligent gas detector employing an array of sensor types. The device has been designed for ease of operation and maintenance. All DGi-TT7-E are constructed from a common housing and electronics with the detection properties being determined by the type of sensor (cartridge) used. A wide range of cells are available, these cells are intrisically safe protected, and may be replaced with the detector powered which minimises the system down time. The intelligent, microprocessor driven unit is fully configurable using a wireless hand-held terminal (TLU) or by using the hard wired HART option giving true flexibility to the installer and reduced service costs. Elements such as relay operation and alarm levels are all set via the TLU, a hazardous area approved hand-held unit. The unit may be interfaced directly with a wide range of panels, controllers and PLC’s etc. Its integral daylight readable alphanumeric display indicates local status and alarm level. Thanks to the hot swat field cabling technology, the sensor can be changed in a hazardous area without requiring area declassification. The device offers HART Protocol 7th edition output as an option which allows full configuration and diagnostics over nonproprietary interface. Features High visible display On board relays Display color is status dependent Technical data General: Technology Auto heating of electrochemical cell Output signal: Standard 4-20mA, max. load impedance 700 (Std. ) 2 x configurable Relays max 1 A / 30V Option HART(R) HART Protocol (7th edition) (pending) Option 0-22mA (User configurable) Option Lonworks (Syntel) Local display 4 digit LED display with automatic intensity adjustment Electrical: Power supply 24V DC, RANGE (18 - 28V DC) Power consumption 2W NOMINAL, 7.8W MAX. HEATING Connection 0.3 mm2 (22 AWG) - 1.5 mm2 (1 6 AWG) Shielded cable recommended Environmental: Storage -40°C to +70°C (-40°F to +158°F) Transmitter 0°C to +20°C (0°F to +68°F) Cartridge / Cell Operation See above table of gases Humidity 99% RH (non-condensing) Pressure Atmospheric pressure +/- 10% Ingress IP66 RFI /EMI Complies with EN50270 Housing: Material 316 L stainless steel Weight 4 Kg (8Lbs) Approvals: ATEX II 2 G Ex d ia I IC T6 Gb (-20°C to +60°C) Certificate number LCIE 13 ATEX 3024 X IECEx Ex d ia I IC T6 Gb - IECEx LCIE 13.001 X Accessories: TLU600 Infrared remote control unit AS056-250 Sun shade AS005 Calibration cup AS051 Calibration cup for breakable ampoules AS011 -2 Sample flow housing AS019 Splash guard CAL-K1 C-xxAE-1 A1 -00 Calibration kit (xx = gas to be specified) CAL-A00-xxAF-000-00 Box of 10 breakable gas ampoule (xx = 31 for1 00ppm NH3, 39 for 50ppm H2S) For use with AS051 cup AS047 Display protection Other products (stainless steel range): DG-TT7-S MultiTox, Solid-State (MOS) Gas Detector DF-TV7 MultiFlame, Flame Detector DG-TX7 MultiXplo, Flammable Gas Detector   Product Data Sheet

What is the Oldham Simtronics GD1-L0P-31KH-0XJ-A3?The Oldham Simtronics GD1-L0P-31KH-0XJ-A3 is: GD1 System H2S 200 ppm*m, 75m range, ATEX, IECEx, 4-20mA, sink, HART. The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings. The GD1 Open Path Laser Gas Detectors group in the 2026 price book lists 24 orderable part numbers, and ordered against ATEX approval, with the 4-20 mA current sink output stage, covering 200 ppm*m.What are the specifications of the GD1 Open Path Laser Gas Detectors?Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-L0P-31KH-0XJ-A3 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 GD1 laser open path H2S gas detector already in our catalogue.

What is the Oldham Simtronics GD1-L0P-31KK-0XH-A3?The Oldham Simtronics GD1-L0P-31KK-0XH-A3 is: GD1 System H2S 1,000 ppm*m, 75m range, ATEX, IECEx, 4-20mA, source, HART. The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings. The GD1 Open Path Laser Gas Detectors group in the 2026 price book lists 24 orderable part numbers, and ordered against ATEX approval, with the 4-20 mA current source output stage, covering 1,000 ppm*m.What are the specifications of the GD1 Open Path Laser Gas Detectors?Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-L0P-31KK-0XH-A3 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 GD1 laser open path H2S gas detector already in our catalogue.

What is the Oldham Simtronics GD1-L0P-31KL-0XJ-A3?The Oldham Simtronics GD1-L0P-31KL-0XJ-A3 is: GD1 System H2S 2,000 ppm*m, 75m range, ATEX, IECEx, 4-20mA, sink, HART. The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings. The GD1 Open Path Laser Gas Detectors group in the 2026 price book lists 24 orderable part numbers, and ordered against ATEX approval, with the 4-20 mA current sink output stage, covering 2,000 ppm*m.What are the specifications of the GD1 Open Path Laser Gas Detectors?Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-L0P-31KL-0XJ-A3 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 GD1 laser open path H2S gas detector already in our catalogue.

What is the Oldham Simtronics GD1-L0P-31KN-0XH-A3?The Oldham Simtronics GD1-L0P-31KN-0XH-A3 is: GD1 System H2S 10,000 ppm*m, 75m range, ATEX, IECEx, 4-20mA, source, HART. The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings. The GD1 Open Path Laser Gas Detectors group in the 2026 price book lists 24 orderable part numbers, and ordered against ATEX approval, with the 4-20 mA current source output stage, covering 10,000 ppm*m.What are the specifications of the GD1 Open Path Laser Gas Detectors?Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-L0P-31KN-0XH-A3 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 GD1 laser open path H2S gas detector already in our catalogue.

What is the Oldham Simtronics GD1-L0R-31KH-0XJ-A3?The Oldham Simtronics GD1-L0R-31KH-0XJ-A3 is: GD1 Receiver H2S 200 ppm*m, ATEX, IECEx, 4-20mA, sink, HART, Standard range. The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings. The GD1 Open Path Laser Gas Detectors group in the 2026 price book lists 24 orderable part numbers, and ordered against ATEX approval, with the 4-20 mA current sink output stage, covering 200 ppm*m.What are the specifications of the GD1 Open Path Laser Gas Detectors?Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-L0R-31KH-0XJ-A3 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 GD1 laser open path H2S gas detector already in our catalogue.

What is the Oldham Simtronics GD1-L0T-31KH-0XJ-A3?The Oldham Simtronics GD1-L0T-31KH-0XJ-A3 is: GD1 Transmitter H2S 200 ppm*m, 75m range. ATEX, IECEx, 4-20mA, sink, HART. The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings. The GD1 Open Path Laser Gas Detectors group in the 2026 price book lists 24 orderable part numbers, and ordered against ATEX approval, with the 4-20 mA current sink output stage, covering 200 ppm*m.What are the specifications of the GD1 Open Path Laser Gas Detectors?Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-L0T-31KH-0XJ-A3 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 GD1 laser open path H2S gas detector already in our catalogue.

What is the Oldham Simtronics GD1-X00-TT05?The Oldham Simtronics GD1-X00-TT05 is: Gas test cell with carry case (Long type). The GD1 is a laser based open path detector for hydrogen sulphide, built as a separate transmitter and receiver. The transmitter emits an infrared laser beam, shaped as a cone rather than a focused pointer beam, and the receiver measures how much light the gas absorbs along the line of sight. The laser diode wavelength is monitored more than 500 times per second so that the absorption line keeps matching the target gas, which is why the detector needs no on-site calibration for its whole life and shows no cross interference from other gases. The laser is Class 1 and eye safe, and both transmitter and receiver have heated optics inside stainless steel housings.About the GD1 Open Path Laser Gas Detectors lineThis part is an accessory for the GD1 Open Path Laser Gas Detectors line. The specification below describes the detectors it is used with, not the accessory itself.Detection method: near infrared laser scanning with a tunable laser diode, Class 1 eye safeDetected gas: hydrogen sulphide (H2S)Range: 0 to 200 ppm*m default; path length 5 to 75 mAccuracy and repeatability: better than plus or minus 8 ppm*m (under plus or minus 4% of full range)Response time: 5 secondsOutput: 4-20 mA sink or source, factory set, maximum load impedance 500 ohm, with HARTFault signalling: 1 mA fault, 2 mA beam block, optional 3 mA warning; beam block declared above 98% obscurationAlignment tolerance plus or minus 0.3 degrees, with heated optics on both transmitter and receiverSafety Integrity Level 2, with a functional test interval of once per yearCalibration factory set, no field recalibrationWhat should you check before ordering?The GD1 carries a 5 year limited warranty, and it is void if the detector was installed or operated outside the procedures in the operating manual. Alignment is the field risk worth planning for: the laser beam presents a smaller target area than a conventional open path system, so it needs higher alignment accuracy to reach sufficient optical transmission, and poor alignment reduces system performance rather than failing outright. During alignment the 4-20 mA output holds at 2 mA and at power up it holds 1 mA, so a control room seeing those values during commissioning is reading a documented state, not a fault.How do the part numbers differ?The price book lists three orderable forms of the same optical path: a complete System (transmitter and receiver together), a Transmitter on its own, and a Receiver on its own, so a damaged half can be replaced without rebuying the pair.Where is it used?Typical service: Perimeter and fence line hydrogen sulphide monitoring; Open outdoor structures where a single path replaces multiple point detectors; Property boundary monitoring on oil and gas sites; Installations where cross interference from other gases must be excluded.How do I order or get a quote?PE Energy supplies the Oldham Simtronics GD1-X00-TT05 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 GD1 laser open path H2S gas detector already in our catalogue.