Whitmore®’s Desiccant Breather line, Air Sentry®, sets the standard for contamination control. These breathers have state-of-the-art features that reduce particulate and moisture contamination, keeping your equipment and fluids lasting longer.
The innovative breather line integrates check valve technology in a desiccant breather and offers replacement cartridges, to significantly reduce maintenance costs.
The clear view 360 degree design makes it easy to inspect the saturation of the color-changing silica gel from a distance. The inert silica gel turns from gold to dark green to visually indicate the adsorption of moisture and confirm the breather is getting the job done.
Air Sentry products cover a wide range of application requirements. The line consists of Good, Better and Best options designed to meet your specific application and duration specification.
D-Series Desiccant Breathers
Air Sentry’s D-Series Breathers are manufactured from top quality raw materials to meet the demands of today’s stationary fluid management applications.
These breathers from Whitmore Manufacturing utilize 100% silica gel that offers fast moisture adsorption.
The activated carbon used in every D Series Whitmore breather enhances their capability to handle fumes and odors.
All models of the D Series have a solid particle filtration system and are designed to provide an airflow rating of 20 cfm.
Moreover, they are compatible with a wide range of materials and are designed to offer impressive impact resistance.
The D Series has various Whitmore breather models including D-101, D-104, D-154, D-102, D-103, D-104, and D-108.
These models are ideal for various stationary applications including fluid reservoirs, oil storage tanks, pumps, and transformers.
| Model | Item Number | Height | Mounting Connection | Maximum Adsorption Capacity |
| D-101 | 095D101 | 5 in 12.7 cm | 1″ slip fit | 8.6 fl oz 254 mL |
| D-154 | 095D154 | 5 in 12.7 cm | 1″ MNPT | 8.6 fl oz 254 mL |
| D-102 | 095D102 | 8 in 20.3 cm | 1″ slip fit | 16.56 fl oz 489 mL |
| D-103 | 095D103 | 8 in 20.3 cm | 1″ MNPT | 16.56 fl oz 489 mL |
| D-104 | 095D104 | 8 in 20.3 cm | 2″ MNPT | 16.56 fl oz 489 mL |
| D-108 | 095D108 | 10 in 25.4 cm | 2″ MNPT | 21.47 fl oz 634 mL |
L-Series Desiccant Breathers
Air Sentry’s L-Series Desiccant Breathers utilize 100% silica gel, and they are specially engineered for a wide range of applications including vacuum lines, air exhaust lines, and marine vehicles.
Every L Series Whitmore breather features an in-line filter/dryer system that removes residues and water vapor from lines.
In addition, they are capable of filtering particles that are as small as 2 micron in size.
The special design of these breathers from Whitmore Manufacturing thus ensures that the system outputs clean and dry air.
Moreover, the L-143 Whitmore breather has a pressure rating of 60 psi, thus making it a suitable option for most of today’s industrial applications.
M-Series Desiccant Breathers
Air Sentry’s M-Series Breathers are manufactured from heavy duty material and are suitable for a wide range of heavy duty applications including heavy mobile equipment and heavy duty off-road equipment.
The special design of every M-Series Whitmore breather makes them a suitable choice for environments with corrosive chemicals and high temperatures.
These breathers from Whitmore Manufacturing can be used in fluid reservoirs and fuel tanks to replace standard breather caps or vent tubes.
The filters of every M-series Whitmore breather are capable of filtering particles that are as small as 2 micron.
Moreover, the special design of these breathers prevents foaming or entry of fluids into the breather.
The M-Series has many models including M-103, M-104, M-105, M-106, and M-107.
R-Series Desiccant Breathers
Air Sentry’s R-Series breathers are specially engineered for today’s heavy duty applications.
These Whitmore breathers are suitable for hydraulic fluid tanks and reservoirs of cranes, construction vehicles, farm implements, railroads, and off-road trucks.
The special design of each Whitmore breather makes them suitable for use in off-road, construction and other applications that may expose machinery to high levels of vibrations.
In addition, these heavy duty breathers from Whitmore manufacturing company are a suitable replacement for standard breather caps.
Some of the models in Air Sentry’s R-Series include R-101, R-102, R-111, R-121, R-122, and R-123.
| Model | Item Number | Height | Diameter | Mounting Connection |
| R-101 | 095R101 | 6.5 in 16.5 cm | 5.2 in 13.2 cm | 1″ MNPT |
| R-102 | 095R102 | 9.5 in 24.1 cm | 5.2 in 13.2 cm | 1″ MNPT |
| R-111 | 095R111 | 6 in 15.2 cm | 5.2 in 13.2 cm | 1.125″ Female thread |
| R-121 | 095R121 | 6.5 in 16.5 cm | 5.2 in 13.2 cm | 2″ MNPT |
| R-122 | 095R122 | 9.5 in 24.1 cm | 5.2 in 13.2 cm | 2″ MNPT |
| R-123 | 095R122 | 12 in 30.5 cm | 5.2 in 13.2 cm | 2″ MNPT |
XR-Series Desiccant Breathers
XR-Series Desiccant Breathers are specially engineered by Whitmore Manufacturing Rockwall Tx for industries that demand high tolerance to harsh conditions.
Their special design makes them ideal for applications that expose systems to moisture, dust and high levels of vibrations.
These Whitmore breathers are suitable for use in wind mills, wind power systems, mobile equipment, and mining equipment.
The presence of check valves on the top cap of every XR-Series Whitmore breather prevents entry of solid particles and moisture.
In addition, they come with a metal reinforced base that is capable of withstanding high levels of vibrations.
Air Sentry’s XR-Series has many models including XR-108, XR-501, XR-502, XR-508, XR-521, and XR-522.
| Model | Item Number | Check Valve PSI In/Out | Height | Diameter |
| XR-108 | 095XR108 | 0.1 2.0 | 14 in 35.6 cm | 5.2 in 13.2 cm |
| XR-501 | 095XR501 | 0.1 0.1 | 8.5 in 21.6 cm | 5.2 in 13.2 cm |
| XR-502 | 095XR502 | 0.1 0.1 | 11.5 in 29.2 cm | 5.2 in 13.2 cm |
| XR-508 | 095XR508 | 0.1 0.1 | 14 in 35.6 cm | 5.2 in 13.2 cm |
| XR-521 | 095XR521 | 0.1 0.1 | 8.5 in 21.6 cm | 5.2 in 13.2 cm |
| XR-522 | 095XR522 | 0.1 0.1 | 11.5 in 29.2 cm | 5.2 in 13.2 cm |
X-Series Desiccant Breathers
Air Sentry’s X-Series Breathers are specially designed for applications in environments that have high levels of dust and humidity.
The design of this series of breathers from Whitmore Manufacturing makes them ideal for paper mills, mine quarries, steam cleaning rooms, and other high humidity/high dust applications.
Each X-Series Whitmore breather in this series features a reusable top cap and two check valves that help to extend the life of the desiccant.
In addition, just like other breathers produced by Whitmore Manufacturing Company, this product is designed to allow ease of maintenance.
Some of the breathers in this series include X-100, X-501, X-502, X-503, X-505, X-521, and X-522.
| Model | Item Number | Check Valve PSI In/Out | Height inches (cm) | Diameter inches (cm) |
| X-50 | 095X50 | 0.3 / 0.3 | 5 (12.7) | 3 (7.6) |
| X-100 | 095X100 | 0.3 / 0.3 | 6.25 (15.9) | 3.25 (8.3) |
| X-501 | 095X501 | 0.1/0.1 | 7 (17.8) | 5 (12.7) |
| X-502 | 095X502 | 0.1/0.1 | 10 (25.4) | 5 (12.7) |
| X-503 | 095X503 | 0.1/0.1 | 7 (17.8) | 5 (12.7) |
| X-505 | 095X505 | 0.1/0.1 | 10 (25.4) | 5 (12.7) |
| X-521 | 095X521 | 0.1/0.1 | 7 (17.8) | 5 (12.7) |
| X-522 | 095X522 | 0.1/0.1 | 10 (25.4) | 5 (12.7) |
Z-Series Desiccant Breathers
Air Sentry’s Z-Series Breathers are specially engineered for applications with space constraints.
The design of every Z-Series Whitmore breather makes them suitable for applications that have low airflow requirements.
This series of breathers from Whitmore Manufacturing Company are widely used in drums, gearboxes, totes, small oil containers and other limited space applications.
Some of the models in this series of Whitmore breathers include Z-131, Z-132, Z-133, Z-134, and Z-135.
| Model | Item Number | Height | Diameter | Maximum Adsorption Capacity |
| Z-131 | 095Z131 | 2 in 5.1 cm | 2 in 5.1 cm | 0.49 fl oz 14 mL |
| Z-132 | 095Z132 | 3.25 in 8.3 cm | 2 in 5.1 cm | 0.92 fl oz 27 mL |
| Z-133 | 095Z133 | 2 in 5.1 cm | 3.25 in 8.3 cm | 1.84 fl oz 54 mL |
| Z-134 | 095Z134 | 3.25 in 8.3 cm | 3.25 in 8.3 cm | 3.06 fl oz 90 mL |
| Z-135 | 095Z135 | 5.5 in 14.0 cm | 3.25 in 8.3 cm | 4.91 fl oz 145 mL |
Guardian® Series Desiccant Breathers
Air Sentry’s Guardian-Series breathers are specially engineered from a highly resistant material enabling them to deliver high resistance to impact.
The special construction of each Guardian-Series Whitmore breather also enables them to withstand exposure to chemicals.
Unlike most breathers manufactured by Whitmore Manufacturing, models of the Guardian-Series are suitable for diesel fuel applications.
The modular construction of models in this series of breathers enables users to customize their products depending on the needs of their applications.
Some of the add-on features that are available for these models include shield wash-down caps, high-capacity air filters, integrated compound vacuum/pressure gauges, and isolation check valves.
| Model | Item Number | Height | Diameter | Maximum Adsorption Capacity |
| G5S1N | 095G5S1N | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1NC | 095G5S1NC | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1NG | 095G5S1NG | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1NGC | 095G5S1NGC | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S2N | 095G5S2N | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S2NC | 095G5S2NC | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S2NG | 095G5S2NG | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S2NGC | 095G5S2NGC | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1B | 095G5S1B | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1BC | 095G5S1BC | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1BG | 095G5S1BG | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G5S1BGC | 095G5S1BGC | 9 in 22.3 cm | 5.125 in | 9.2 fl oz 272 mL |
| G8S1N | 095G8S1N | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1NC | 095G8S1NC | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1NG | 095G8S1NG | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1NGC | 095G8S1NGC | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S2N | 095G8S2N | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S2NC | 095G8S2NC | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S2NG | 095G8S2NG | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S2NGC | 095G8S2NGC | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1B | 095G8S1B | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1BC | 095G8S1BC | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1BG | 095G8S1BG | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G8S1BGC | 095G8S1BGC | 12 in 30.5 cm | 5.125 in | 17.2 fl oz 508.7 mL |
| G12S1N | 095G12S1N | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1NC | 095G12S1NC | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1NG | 095G12S1NG | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1NGC | 095G12S1NGC | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S2N | 095G12S2N | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S2NC | 095G12S2NC | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S2NG | 095G12S2NG | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S2NGC | 095G12S2NGC | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1B | 095G12S1B | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1BC | 095G12S1BC | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1BG | 095G12S1BG | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
| G12S1BGC | 095G12S1BGC | 16 in 40.6 cm | 5.125 in | 27.6 fl oz 816 mL |
Replacement Cartridges
| Model | Item Number | Height | Diameter | Maximum Adsorption Capacity |
| GRC5ACC | 095GRC5ACC | 5 in | 5 in | n/a |
| GRC5M | 095GRC5M | 5 in | 5 in | 4.6 fl oz 136 mL |
| GRC5MC | 095GRC5MC | 5 in | 5 in | 4.6 fl oz 136 mL |
| GRC5S | 095GRC5S | 5 in | 5 in | 9.2 fl oz 272 mL |
| GRC5SC | 095GRC5SC | 5 in | 5 in | 9.2 fl oz 272 mL |
| GRC8S | 095GRC8S | 8 in | 5 in | 17.2 fl oz 508.7 mL |
| GRC8SC | 095GRC8SC | 8 in | 5 in | 17.2 fl oz 508.7 mL |
| GRC12S | 095GRC12S | 12 in | 5 in | 27.6 fl oz 816 mL |
| GRC12SC | 095GRC12SC | 12 in | 5 in | 27.6 fl oz 816 mL |
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