Dwyer Instruments 1638-0 Pressure Switch
The Dwyer Instruments 1638-0 Pressure Switch is a high-precision, large diaphragm differential pressure switch engineered for critical HVAC and industrial process monitoring. Designed for use with air and non-combustible gases, this low pressure switch features an adjustable range of 0.05" w.c. to 0.25" w.c., making it ideal for duct air control and sensitive differential pressure sensing. The unit utilizes a single pole double throw (SPDT) switch, rated at 15 amps for 120-480 VAC, allowing it to handle many small electrical loads without additional relays. A key feature for field technicians is the visible set point indicator, which simplifies calibration and troubleshooting by providing a clear internal scale. To maintain the ±1% repeatability rating, the silicone rubber diaphragm must be installed in a vertical plane. With 1/8" female NPT process connections and a rugged 16-gauge steel housing, the 1638-0 provides the high sensitivity required for damper positioning and cleanroom applications.
Key Benefits- Visible Set Point Scale: Allows for rapid verification of set points and onsite adjustment using the internal screw without specialized gauges.
- High Current Capacity: 15A electrical rating supports direct control of motors and dampers, reducing wiring complexity.
- Precision Sensitivity: Large diaphragm design ensures accurate response to minute pressure changes as low as 0.05" w.c.
- Industrial Construction: Zinc-plated 16-gauge steel housing provides durability in demanding mechanical rooms and industrial environments.
What is the proper mounting orientation for the Dwyer 1638-0?
This switch is position-sensitive and must be mounted with the diaphragm in a vertical plane to ensure the accuracy of the calibrated set point.
Can this switch be used for combustible gas applications?
No, the 1638-0 is specifically rated for air and non-combustible, compatible gases only. Always verify media compatibility with the silicone rubber diaphragm.
What is the deadband for this specific model?
The approximate deadband for the 1638-0 ranges between 0.04" to 0.05" w.c., which is the fixed difference between the set point and the reset point.
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: $560.78
-65%$560.78
$196.27Dwyer Instruments 1638-0 Pressure Switch
The Dwyer Instruments 1638-0 Pressure Switch is a high-precision, large diaphragm differential pressure switch engineered for critical HVAC and industrial process monitoring. Designed for use with air and non-combustible gases, this low pressure switch features an adjustable range of 0.05" w.c. to 0.25" w.c., making it ideal for duct air control and sensitive differential pressure sensing. The unit utilizes a single pole double throw (SPDT) switch, rated at 15 amps for 120-480 VAC, allowing it to handle many small electrical loads without additional relays. A key feature for field technicians is the visible set point indicator, which simplifies calibration and troubleshooting by providing a clear internal scale. To maintain the ±1% repeatability rating, the silicone rubber diaphragm must be installed in a vertical plane. With 1/8" female NPT process connections and a rugged 16-gauge steel housing, the 1638-0 provides the high sensitivity required for damper positioning and cleanroom applications.
Key Benefits- Visible Set Point Scale: Allows for rapid verification of set points and onsite adjustment using the internal screw without specialized gauges.
- High Current Capacity: 15A electrical rating supports direct control of motors and dampers, reducing wiring complexity.
- Precision Sensitivity: Large diaphragm design ensures accurate response to minute pressure changes as low as 0.05" w.c.
- Industrial Construction: Zinc-plated 16-gauge steel housing provides durability in demanding mechanical rooms and industrial environments.
What is the proper mounting orientation for the Dwyer 1638-0?
This switch is position-sensitive and must be mounted with the diaphragm in a vertical plane to ensure the accuracy of the calibrated set point.
Can this switch be used for combustible gas applications?
No, the 1638-0 is specifically rated for air and non-combustible, compatible gases only. Always verify media compatibility with the silicone rubber diaphragm.
What is the deadband for this specific model?
The approximate deadband for the 1638-0 ranges between 0.04" to 0.05" w.c., which is the fixed difference between the set point and the reset point.
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 Dwyer Instruments 1638-0 Pressure Switch is a high-precision, large diaphragm differential pressure switch engineered for critical HVAC and industrial process monitoring. Designed for use with air and non-combustible gases, this low pressure switch features an adjustable range of 0.05" w.c. to 0.25" w.c., making it ideal for duct air control and sensitive differential pressure sensing. The unit utilizes a single pole double throw (SPDT) switch, rated at 15 amps for 120-480 VAC, allowing it to handle many small electrical loads without additional relays. A key feature for field technicians is the visible set point indicator, which simplifies calibration and troubleshooting by providing a clear internal scale. To maintain the ±1% repeatability rating, the silicone rubber diaphragm must be installed in a vertical plane. With 1/8" female NPT process connections and a rugged 16-gauge steel housing, the 1638-0 provides the high sensitivity required for damper positioning and cleanroom applications.
Key Benefits- Visible Set Point Scale: Allows for rapid verification of set points and onsite adjustment using the internal screw without specialized gauges.
- High Current Capacity: 15A electrical rating supports direct control of motors and dampers, reducing wiring complexity.
- Precision Sensitivity: Large diaphragm design ensures accurate response to minute pressure changes as low as 0.05" w.c.
- Industrial Construction: Zinc-plated 16-gauge steel housing provides durability in demanding mechanical rooms and industrial environments.
What is the proper mounting orientation for the Dwyer 1638-0?
This switch is position-sensitive and must be mounted with the diaphragm in a vertical plane to ensure the accuracy of the calibrated set point.
Can this switch be used for combustible gas applications?
No, the 1638-0 is specifically rated for air and non-combustible, compatible gases only. Always verify media compatibility with the silicone rubber diaphragm.
What is the deadband for this specific model?
The approximate deadband for the 1638-0 ranges between 0.04" to 0.05" w.c., which is the fixed difference between the set point and the reset point.
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.
