United Electric J21K-140 Pressure Switch
The United Electric J21K-140 Pressure Switch is a high-sensitivity differential pressure switch engineered for precise monitoring in demanding HVAC and industrial environments. This unit utilizes opposing brass bellows to accurately detect the pressure drop across filters, coils, or heat exchangers. With an adjustable range of 0 to 6 PSID and a tight deadband of 0.1 to 0.4 PSI, it provides the low-end resolution required for airflow proving and high-limit safety cutouts in air handling units. The SPDT switch is rated for 15A at up to 480 VAC, allowing for direct control of heavy-duty motors and alarm circuits. Encased in a rugged, NEMA 4X epoxy-coated enclosure, the J21K-140 (cross-compatible with J21K-140-9532) maintains reliable performance in outdoor or wash-down settings. Field adjustments are simplified via an internal 5/16-inch hex screw, ensuring the setpoint remains secure from unauthorized tampering while providing ±1% repeatability for critical process control.
- Dual Bellows Design: Features opposing metal bellows to sense minute pressure differences with professional-grade accuracy.
- High-Capacity Switching: The 15A SPDT output supports diverse electrical loads across 125, 250, and 480 VAC systems.
- Industrial Protection: The NEMA 4 rating ensures the internal mechanism is protected against dust, rain, and hose-directed water.
- HVAC Optimization: Tailored for low-pressure differential applications like pump status verification and filter monitoring.
- Seamless Integration: Compact footprint with 1/4 inch FNPT pressure connections fits easily into standard piping and ductwork configurations.
Common Questions
Is the J21K-140 suitable for liquid media?
Yes, the brass and bronze wetted parts are compatible with water, glycol, and non-corrosive gases typically found in commercial hydronic and compressed air systems.
How do I adjust the differential setpoint on this switch?
Adjustments are made internally to prevent accidental shifts. Use a 5/16-inch wrench on the hex nut to increase or decrease the pressure at which the SPDT contacts trip.
Can this replace a J21K-140-9532 model?
Absolutely. The J21K-140 is tech-identical to the 9532 factory stock number, sharing the same 0-6 PSID range and form factor.
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-140 Pressure Switch
The United Electric J21K-140 Pressure Switch is a high-sensitivity differential pressure switch engineered for precise monitoring in demanding HVAC and industrial environments. This unit utilizes opposing brass bellows to accurately detect the pressure drop across filters, coils, or heat exchangers. With an adjustable range of 0 to 6 PSID and a tight deadband of 0.1 to 0.4 PSI, it provides the low-end resolution required for airflow proving and high-limit safety cutouts in air handling units. The SPDT switch is rated for 15A at up to 480 VAC, allowing for direct control of heavy-duty motors and alarm circuits. Encased in a rugged, NEMA 4X epoxy-coated enclosure, the J21K-140 (cross-compatible with J21K-140-9532) maintains reliable performance in outdoor or wash-down settings. Field adjustments are simplified via an internal 5/16-inch hex screw, ensuring the setpoint remains secure from unauthorized tampering while providing ±1% repeatability for critical process control.
- Dual Bellows Design: Features opposing metal bellows to sense minute pressure differences with professional-grade accuracy.
- High-Capacity Switching: The 15A SPDT output supports diverse electrical loads across 125, 250, and 480 VAC systems.
- Industrial Protection: The NEMA 4 rating ensures the internal mechanism is protected against dust, rain, and hose-directed water.
- HVAC Optimization: Tailored for low-pressure differential applications like pump status verification and filter monitoring.
- Seamless Integration: Compact footprint with 1/4 inch FNPT pressure connections fits easily into standard piping and ductwork configurations.
Common Questions
Is the J21K-140 suitable for liquid media?
Yes, the brass and bronze wetted parts are compatible with water, glycol, and non-corrosive gases typically found in commercial hydronic and compressed air systems.
How do I adjust the differential setpoint on this switch?
Adjustments are made internally to prevent accidental shifts. Use a 5/16-inch wrench on the hex nut to increase or decrease the pressure at which the SPDT contacts trip.
Can this replace a J21K-140-9532 model?
Absolutely. The J21K-140 is tech-identical to the 9532 factory stock number, sharing the same 0-6 PSID range and form factor.
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.
Product Information
Product Information
Shipping & Returns
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Description
The United Electric J21K-140 Pressure Switch is a high-sensitivity differential pressure switch engineered for precise monitoring in demanding HVAC and industrial environments. This unit utilizes opposing brass bellows to accurately detect the pressure drop across filters, coils, or heat exchangers. With an adjustable range of 0 to 6 PSID and a tight deadband of 0.1 to 0.4 PSI, it provides the low-end resolution required for airflow proving and high-limit safety cutouts in air handling units. The SPDT switch is rated for 15A at up to 480 VAC, allowing for direct control of heavy-duty motors and alarm circuits. Encased in a rugged, NEMA 4X epoxy-coated enclosure, the J21K-140 (cross-compatible with J21K-140-9532) maintains reliable performance in outdoor or wash-down settings. Field adjustments are simplified via an internal 5/16-inch hex screw, ensuring the setpoint remains secure from unauthorized tampering while providing ±1% repeatability for critical process control.
- Dual Bellows Design: Features opposing metal bellows to sense minute pressure differences with professional-grade accuracy.
- High-Capacity Switching: The 15A SPDT output supports diverse electrical loads across 125, 250, and 480 VAC systems.
- Industrial Protection: The NEMA 4 rating ensures the internal mechanism is protected against dust, rain, and hose-directed water.
- HVAC Optimization: Tailored for low-pressure differential applications like pump status verification and filter monitoring.
- Seamless Integration: Compact footprint with 1/4 inch FNPT pressure connections fits easily into standard piping and ductwork configurations.
Common Questions
Is the J21K-140 suitable for liquid media?
Yes, the brass and bronze wetted parts are compatible with water, glycol, and non-corrosive gases typically found in commercial hydronic and compressed air systems.
How do I adjust the differential setpoint on this switch?
Adjustments are made internally to prevent accidental shifts. Use a 5/16-inch wrench on the hex nut to increase or decrease the pressure at which the SPDT contacts trip.
Can this replace a J21K-140-9532 model?
Absolutely. The J21K-140 is tech-identical to the 9532 factory stock number, sharing the same 0-6 PSID range and form factor.
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.
