United Electric J21K-S150B Pressure Switch
The United Electric J21K-S150B Pressure Switch is an industrial-grade differential control designed for precision monitoring in HVAC/R and process systems. Engineered with welded 316L stainless steel bellows, this model provides high-sensitivity detection for filter status monitoring, proof of flow, and chiller protection. The J21K-S150B features a field-adjustable range of 0 to 40 PSID, allowing technicians to fine-tune setpoints via an internal red 5/16 hex nut. Its SPDT snap-action switch is rated for 15A at 125/250/480 VAC, ensuring reliable performance in demanding compressor and vacuum pump applications. Housed in a NEMA 4X epoxy-coated die-cast aluminum enclosure, it offers superior resistance to moisture and corrosion. With a 1/2 inch NPTF process connection and repeatability within ±1%, this differential pressure switch is a standard-issue component for contractors managing building automation systems and heavy-duty refrigeration units.
Key Benefits- Durable Construction: Heavy-duty, epoxy-coated enclosure and 316L stainless steel wetted parts provide long-term reliability in corrosive environments.
- Field Adjustability: The 0-40 PSID range with an internal hex screw allows for precise calibration to specific system requirements.
- High Load Capacity: Rated at 15A resistive, the SPDT contact handles high-voltage industrial loads without the need for additional relays.
- Environmental Protection: The NEMA 4X/NEMA 1 rated housing protects internal components from dust, water, and debris.
- Can this switch be used for liquid flow verification? Yes, the 316L stainless steel bellows are compatible with water, glycol, and various gases, making it an excellent choice for proof of flow in hydronic systems.
- How do I adjust the differential setpoint? Adjustments are made internally by turning the red 5/16 hex nut to achieve the desired trip point within the 0 to 40 PSID window.
- Is this suitable for outdoor chillers? Yes, when installed with watertight conduit fittings, the gasketed enclosure meets NEMA 4X standards for weather protection.
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: $1,179.67
-65%$1,179.67
$412.88United Electric J21K-S150B Pressure Switch
The United Electric J21K-S150B Pressure Switch is an industrial-grade differential control designed for precision monitoring in HVAC/R and process systems. Engineered with welded 316L stainless steel bellows, this model provides high-sensitivity detection for filter status monitoring, proof of flow, and chiller protection. The J21K-S150B features a field-adjustable range of 0 to 40 PSID, allowing technicians to fine-tune setpoints via an internal red 5/16 hex nut. Its SPDT snap-action switch is rated for 15A at 125/250/480 VAC, ensuring reliable performance in demanding compressor and vacuum pump applications. Housed in a NEMA 4X epoxy-coated die-cast aluminum enclosure, it offers superior resistance to moisture and corrosion. With a 1/2 inch NPTF process connection and repeatability within ±1%, this differential pressure switch is a standard-issue component for contractors managing building automation systems and heavy-duty refrigeration units.
Key Benefits- Durable Construction: Heavy-duty, epoxy-coated enclosure and 316L stainless steel wetted parts provide long-term reliability in corrosive environments.
- Field Adjustability: The 0-40 PSID range with an internal hex screw allows for precise calibration to specific system requirements.
- High Load Capacity: Rated at 15A resistive, the SPDT contact handles high-voltage industrial loads without the need for additional relays.
- Environmental Protection: The NEMA 4X/NEMA 1 rated housing protects internal components from dust, water, and debris.
- Can this switch be used for liquid flow verification? Yes, the 316L stainless steel bellows are compatible with water, glycol, and various gases, making it an excellent choice for proof of flow in hydronic systems.
- How do I adjust the differential setpoint? Adjustments are made internally by turning the red 5/16 hex nut to achieve the desired trip point within the 0 to 40 PSID window.
- Is this suitable for outdoor chillers? Yes, when installed with watertight conduit fittings, the gasketed enclosure meets NEMA 4X standards for weather protection.
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-S150B Pressure Switch is an industrial-grade differential control designed for precision monitoring in HVAC/R and process systems. Engineered with welded 316L stainless steel bellows, this model provides high-sensitivity detection for filter status monitoring, proof of flow, and chiller protection. The J21K-S150B features a field-adjustable range of 0 to 40 PSID, allowing technicians to fine-tune setpoints via an internal red 5/16 hex nut. Its SPDT snap-action switch is rated for 15A at 125/250/480 VAC, ensuring reliable performance in demanding compressor and vacuum pump applications. Housed in a NEMA 4X epoxy-coated die-cast aluminum enclosure, it offers superior resistance to moisture and corrosion. With a 1/2 inch NPTF process connection and repeatability within ±1%, this differential pressure switch is a standard-issue component for contractors managing building automation systems and heavy-duty refrigeration units.
Key Benefits- Durable Construction: Heavy-duty, epoxy-coated enclosure and 316L stainless steel wetted parts provide long-term reliability in corrosive environments.
- Field Adjustability: The 0-40 PSID range with an internal hex screw allows for precise calibration to specific system requirements.
- High Load Capacity: Rated at 15A resistive, the SPDT contact handles high-voltage industrial loads without the need for additional relays.
- Environmental Protection: The NEMA 4X/NEMA 1 rated housing protects internal components from dust, water, and debris.
- Can this switch be used for liquid flow verification? Yes, the 316L stainless steel bellows are compatible with water, glycol, and various gases, making it an excellent choice for proof of flow in hydronic systems.
- How do I adjust the differential setpoint? Adjustments are made internally by turning the red 5/16 hex nut to achieve the desired trip point within the 0 to 40 PSID window.
- Is this suitable for outdoor chillers? Yes, when installed with watertight conduit fittings, the gasketed enclosure meets NEMA 4X standards for weather protection.
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.
