United Electric J21K-150 Pressure Switch
The United Electric J21K-150 is a rugged, NEMA 4 differential pressure switch engineered for precision monitoring in demanding HVACR and industrial process environments. This unit features an adjustable differential pressure range of 0 to 40 PSID, utilizing a high-sensitivity opposing metal bellows design to detect pressure variances between two sources. The SPDT snap-action switch output provides versatile control logic, rated for 15A at 125/250/480 VAC, making it ideal for filter status monitoring, proof of flow, and equipment protection in chillers or compressors. Specifically identified as an direct replacement for the J21K-150-9538, this model is housed in an epoxy-coated die-cast aluminum enclosure, ensuring durability against moisture and dust in both indoor and outdoor installations. Technicians can rely on its ±1% repeatability for critical HVAC differential pressure control applications where mechanical reliability is paramount over complex electronic sensors.
Key Benefits- Precise Range Control: Internal 5/16-inch hex screw adjustment allows for field-calibrated settings between 0 and 40 PSID.
- Rugged Environmental Protection: The gasketed NEMA 4 (IP66) enclosure is built to withstand harsh mechanical rooms and outdoor exposure.
- Versatile Electrical Compatibility: Single-pole double-throw (SPDT) contacts support both normally open and normally closed wiring configurations.
- Reliable Sensing Mechanism: Sealed brass bellows provide mechanical sensing that operates independently of control system power or communication networks.
- Direct OEM Compatibility: Functionally identical to model J21K-150-9538 for easy drop-in replacement on existing equipment.
How do I adjust the set point on the J21K-150?
Remove the four cover screws to access the internal red 5/16" hex adjusting screw. Turning it clockwise raises the set point, while counter-clockwise lowers it.
Can this switch be used for liquid media?
Yes, the brass and bronze wetted materials are compatible with water, glycol, and non-corrosive gases typically found in HVACR systems.
What are the pressure connection sizes?
The unit features dual 1/4" NPTF process connections positioned for easy manifold or pipe mounting.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $694.51
-65%$694.51
$243.08United Electric J21K-150 Pressure Switch
The United Electric J21K-150 is a rugged, NEMA 4 differential pressure switch engineered for precision monitoring in demanding HVACR and industrial process environments. This unit features an adjustable differential pressure range of 0 to 40 PSID, utilizing a high-sensitivity opposing metal bellows design to detect pressure variances between two sources. The SPDT snap-action switch output provides versatile control logic, rated for 15A at 125/250/480 VAC, making it ideal for filter status monitoring, proof of flow, and equipment protection in chillers or compressors. Specifically identified as an direct replacement for the J21K-150-9538, this model is housed in an epoxy-coated die-cast aluminum enclosure, ensuring durability against moisture and dust in both indoor and outdoor installations. Technicians can rely on its ±1% repeatability for critical HVAC differential pressure control applications where mechanical reliability is paramount over complex electronic sensors.
Key Benefits- Precise Range Control: Internal 5/16-inch hex screw adjustment allows for field-calibrated settings between 0 and 40 PSID.
- Rugged Environmental Protection: The gasketed NEMA 4 (IP66) enclosure is built to withstand harsh mechanical rooms and outdoor exposure.
- Versatile Electrical Compatibility: Single-pole double-throw (SPDT) contacts support both normally open and normally closed wiring configurations.
- Reliable Sensing Mechanism: Sealed brass bellows provide mechanical sensing that operates independently of control system power or communication networks.
- Direct OEM Compatibility: Functionally identical to model J21K-150-9538 for easy drop-in replacement on existing equipment.
How do I adjust the set point on the J21K-150?
Remove the four cover screws to access the internal red 5/16" hex adjusting screw. Turning it clockwise raises the set point, while counter-clockwise lowers it.
Can this switch be used for liquid media?
Yes, the brass and bronze wetted materials are compatible with water, glycol, and non-corrosive gases typically found in HVACR systems.
What are the pressure connection sizes?
The unit features dual 1/4" NPTF process connections positioned for easy manifold or pipe mounting.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The United Electric J21K-150 is a rugged, NEMA 4 differential pressure switch engineered for precision monitoring in demanding HVACR and industrial process environments. This unit features an adjustable differential pressure range of 0 to 40 PSID, utilizing a high-sensitivity opposing metal bellows design to detect pressure variances between two sources. The SPDT snap-action switch output provides versatile control logic, rated for 15A at 125/250/480 VAC, making it ideal for filter status monitoring, proof of flow, and equipment protection in chillers or compressors. Specifically identified as an direct replacement for the J21K-150-9538, this model is housed in an epoxy-coated die-cast aluminum enclosure, ensuring durability against moisture and dust in both indoor and outdoor installations. Technicians can rely on its ±1% repeatability for critical HVAC differential pressure control applications where mechanical reliability is paramount over complex electronic sensors.
Key Benefits- Precise Range Control: Internal 5/16-inch hex screw adjustment allows for field-calibrated settings between 0 and 40 PSID.
- Rugged Environmental Protection: The gasketed NEMA 4 (IP66) enclosure is built to withstand harsh mechanical rooms and outdoor exposure.
- Versatile Electrical Compatibility: Single-pole double-throw (SPDT) contacts support both normally open and normally closed wiring configurations.
- Reliable Sensing Mechanism: Sealed brass bellows provide mechanical sensing that operates independently of control system power or communication networks.
- Direct OEM Compatibility: Functionally identical to model J21K-150-9538 for easy drop-in replacement on existing equipment.
How do I adjust the set point on the J21K-150?
Remove the four cover screws to access the internal red 5/16" hex adjusting screw. Turning it clockwise raises the set point, while counter-clockwise lowers it.
Can this switch be used for liquid media?
Yes, the brass and bronze wetted materials are compatible with water, glycol, and non-corrosive gases typically found in HVACR systems.
What are the pressure connection sizes?
The unit features dual 1/4" NPTF process connections positioned for easy manifold or pipe mounting.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
