Dwyer Instruments 1638-1 Pressure Switch
The Dwyer Instruments 1638-1 Pressure Switch is a high-precision, large diaphragm pressure switch designed specifically for industrial service and HVAC applications like duct air control, damper positioning, and air conditioning system monitoring. This 1630 series model operates within a precise range of 0.20" w.c. to 1.0" w.c. with a tight approximate deadband of 0.04" to 0.06" w.c., ensuring reliable differential pressure sensing for air and non-combustible, compatible gases. Built with a 16-gauge steel housing and a silicone rubber diaphragm, it withstands demanding environments with temperature limits ranging from -30°F to 110°F. The internal SPDT switch features a robust 15A electrical rating at 120-480 VAC, allowing it to handle most small electrical loads or motor starters without additional relays. Installation is straightforward via 1/8" female NPT process connections, though technicians must ensure the diaphragm is mounted in a vertical plane to maintain repeatability and factory calibration accuracy. The visible set point indicator and internal adjustment screw simplify field configuration and performance verification.
Key Benefits for Technicians- Precision Control: The large diaphragm design provides superior low-range accuracy and ±1% repeatability for sensitive air volume applications.
- High Current Capacity: Rated for 15 amps, this industrial pressure switch can directly control small motors or dampers, reducing the need for companion relays.
- Visible Set Point: An integrated scale and indicator allow for immediate visual confirmation of the actuation point during routine maintenance.
- Rugged Build: Constructed with a zinc-plated steel housing and stainless steel calibration spring to survive industrial environments.
- Standardized Connections: Features universal 1/8" female NPT ports and screw-type electrical terminals for quick field wiring.
Is the Dwyer 1638-1 suitable for outdoor use?
Standard models are intended for indoor environments or protected enclosures. For unusually wet or oily conditions, a specific weatherproof housing should be utilized.
What is the maximum pressure this switch can handle?
The unit has a continuous rated pressure of 10 psig and can withstand surge pressures up to 25 psig without damage.
How do I adjust the set point in the field?
Technicians can adjust the actuation point using the internal screw-type adjustment located within the transparent range spring enclosure. Always verify the setting using a calibrated manometer in the final mounting position.
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.
Dwyer Instruments 1638-1 Pressure Switch
The Dwyer Instruments 1638-1 Pressure Switch is a high-precision, large diaphragm pressure switch designed specifically for industrial service and HVAC applications like duct air control, damper positioning, and air conditioning system monitoring. This 1630 series model operates within a precise range of 0.20" w.c. to 1.0" w.c. with a tight approximate deadband of 0.04" to 0.06" w.c., ensuring reliable differential pressure sensing for air and non-combustible, compatible gases. Built with a 16-gauge steel housing and a silicone rubber diaphragm, it withstands demanding environments with temperature limits ranging from -30°F to 110°F. The internal SPDT switch features a robust 15A electrical rating at 120-480 VAC, allowing it to handle most small electrical loads or motor starters without additional relays. Installation is straightforward via 1/8" female NPT process connections, though technicians must ensure the diaphragm is mounted in a vertical plane to maintain repeatability and factory calibration accuracy. The visible set point indicator and internal adjustment screw simplify field configuration and performance verification.
Key Benefits for Technicians- Precision Control: The large diaphragm design provides superior low-range accuracy and ±1% repeatability for sensitive air volume applications.
- High Current Capacity: Rated for 15 amps, this industrial pressure switch can directly control small motors or dampers, reducing the need for companion relays.
- Visible Set Point: An integrated scale and indicator allow for immediate visual confirmation of the actuation point during routine maintenance.
- Rugged Build: Constructed with a zinc-plated steel housing and stainless steel calibration spring to survive industrial environments.
- Standardized Connections: Features universal 1/8" female NPT ports and screw-type electrical terminals for quick field wiring.
Is the Dwyer 1638-1 suitable for outdoor use?
Standard models are intended for indoor environments or protected enclosures. For unusually wet or oily conditions, a specific weatherproof housing should be utilized.
What is the maximum pressure this switch can handle?
The unit has a continuous rated pressure of 10 psig and can withstand surge pressures up to 25 psig without damage.
How do I adjust the set point in the field?
Technicians can adjust the actuation point using the internal screw-type adjustment located within the transparent range spring enclosure. Always verify the setting using a calibrated manometer in the final mounting position.
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
Shipping & Returns
Description
The Dwyer Instruments 1638-1 Pressure Switch is a high-precision, large diaphragm pressure switch designed specifically for industrial service and HVAC applications like duct air control, damper positioning, and air conditioning system monitoring. This 1630 series model operates within a precise range of 0.20" w.c. to 1.0" w.c. with a tight approximate deadband of 0.04" to 0.06" w.c., ensuring reliable differential pressure sensing for air and non-combustible, compatible gases. Built with a 16-gauge steel housing and a silicone rubber diaphragm, it withstands demanding environments with temperature limits ranging from -30°F to 110°F. The internal SPDT switch features a robust 15A electrical rating at 120-480 VAC, allowing it to handle most small electrical loads or motor starters without additional relays. Installation is straightforward via 1/8" female NPT process connections, though technicians must ensure the diaphragm is mounted in a vertical plane to maintain repeatability and factory calibration accuracy. The visible set point indicator and internal adjustment screw simplify field configuration and performance verification.
Key Benefits for Technicians- Precision Control: The large diaphragm design provides superior low-range accuracy and ±1% repeatability for sensitive air volume applications.
- High Current Capacity: Rated for 15 amps, this industrial pressure switch can directly control small motors or dampers, reducing the need for companion relays.
- Visible Set Point: An integrated scale and indicator allow for immediate visual confirmation of the actuation point during routine maintenance.
- Rugged Build: Constructed with a zinc-plated steel housing and stainless steel calibration spring to survive industrial environments.
- Standardized Connections: Features universal 1/8" female NPT ports and screw-type electrical terminals for quick field wiring.
Is the Dwyer 1638-1 suitable for outdoor use?
Standard models are intended for indoor environments or protected enclosures. For unusually wet or oily conditions, a specific weatherproof housing should be utilized.
What is the maximum pressure this switch can handle?
The unit has a continuous rated pressure of 10 psig and can withstand surge pressures up to 25 psig without damage.
How do I adjust the set point in the field?
Technicians can adjust the actuation point using the internal screw-type adjustment located within the transparent range spring enclosure. Always verify the setting using a calibrated manometer in the final mounting position.
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.
