Dwyer Instruments 1638-5 Pressure Switch
For high-precision air pressure monitoring in commercial HVAC and industrial process control, the Dwyer Instruments 1638-5 Pressure Switch is the technician's standard for reliability. Engineering with a large diaphragm design, this unit provides superior sensitivity for detecting differential pressure within a range of 2.0 to 6.0" w.c. The 1630 series is purpose-built for clean air and non-combustible gases, utilizing a silicone rubber diaphragm and a single-pole double-throw (SPDT) snap switch capable of handling 15-amp electrical loads at up to 480 VAC. This high current rating often eliminates the need for auxiliary relays in fan proving and filter monitoring circuits. The 1638-5 model features a 1/8" female NPT process connection and an integrated visible set point indicator, allowing for rapid field adjustments via the internal screw-type mechanism. To maintain its ±1% repeatability, ensure the housing is mounted in a vertical plane to prevent gravitational bias on the diaphragm assembly.
Key Benefits- High Current Capacity: The 15A SPDT switch directly manages most small motor and heater loads without additional components.
- Visual Calibration: An enclosed scale and visible indicator allow for precise set point adjustment and easier troubleshooting.
- Industrial-Grade Construction: Zinc-plated 16-gauge steel housing provides durability in demanding mechanical rooms.
- Precise Low-Range Sensing: A large diaphragm surface area ensures an approximate deadband of 0.07 to 0.25" w.c. for tight control loops.
- Versatile Media Compatibility: Rated for use with air, nitrogen, helium, and other non-corrosive, non-combustible gases.
Does this switch require a specific mounting position?
Yes, for the factory calibration and differential air pressure accuracy to remain valid, the unit must be mounted with the diaphragm in a vertical plane. Horizontal mounting will shift the set point due to the weight of the diaphragm.
What is the maximum pressure this switch can withstand?
The 1638-5 is rated for a continuous pressure of 10 psig and a maximum surge pressure of 25 psig. Exceeding these limits can damage the silicone diaphragm or the internal linkage.
Can I use this for both high and low pressure applications?
The SPDT switch configuration allows you to wire the unit for normally open or normally closed operation, making it suitable for both pressure-rise and pressure-drop detection in HVAC ductwork.
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 1638-5 Pressure Switch
For high-precision air pressure monitoring in commercial HVAC and industrial process control, the Dwyer Instruments 1638-5 Pressure Switch is the technician's standard for reliability. Engineering with a large diaphragm design, this unit provides superior sensitivity for detecting differential pressure within a range of 2.0 to 6.0" w.c. The 1630 series is purpose-built for clean air and non-combustible gases, utilizing a silicone rubber diaphragm and a single-pole double-throw (SPDT) snap switch capable of handling 15-amp electrical loads at up to 480 VAC. This high current rating often eliminates the need for auxiliary relays in fan proving and filter monitoring circuits. The 1638-5 model features a 1/8" female NPT process connection and an integrated visible set point indicator, allowing for rapid field adjustments via the internal screw-type mechanism. To maintain its ±1% repeatability, ensure the housing is mounted in a vertical plane to prevent gravitational bias on the diaphragm assembly.
Key Benefits- High Current Capacity: The 15A SPDT switch directly manages most small motor and heater loads without additional components.
- Visual Calibration: An enclosed scale and visible indicator allow for precise set point adjustment and easier troubleshooting.
- Industrial-Grade Construction: Zinc-plated 16-gauge steel housing provides durability in demanding mechanical rooms.
- Precise Low-Range Sensing: A large diaphragm surface area ensures an approximate deadband of 0.07 to 0.25" w.c. for tight control loops.
- Versatile Media Compatibility: Rated for use with air, nitrogen, helium, and other non-corrosive, non-combustible gases.
Does this switch require a specific mounting position?
Yes, for the factory calibration and differential air pressure accuracy to remain valid, the unit must be mounted with the diaphragm in a vertical plane. Horizontal mounting will shift the set point due to the weight of the diaphragm.
What is the maximum pressure this switch can withstand?
The 1638-5 is rated for a continuous pressure of 10 psig and a maximum surge pressure of 25 psig. Exceeding these limits can damage the silicone diaphragm or the internal linkage.
Can I use this for both high and low pressure applications?
The SPDT switch configuration allows you to wire the unit for normally open or normally closed operation, making it suitable for both pressure-rise and pressure-drop detection in HVAC ductwork.
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
For high-precision air pressure monitoring in commercial HVAC and industrial process control, the Dwyer Instruments 1638-5 Pressure Switch is the technician's standard for reliability. Engineering with a large diaphragm design, this unit provides superior sensitivity for detecting differential pressure within a range of 2.0 to 6.0" w.c. The 1630 series is purpose-built for clean air and non-combustible gases, utilizing a silicone rubber diaphragm and a single-pole double-throw (SPDT) snap switch capable of handling 15-amp electrical loads at up to 480 VAC. This high current rating often eliminates the need for auxiliary relays in fan proving and filter monitoring circuits. The 1638-5 model features a 1/8" female NPT process connection and an integrated visible set point indicator, allowing for rapid field adjustments via the internal screw-type mechanism. To maintain its ±1% repeatability, ensure the housing is mounted in a vertical plane to prevent gravitational bias on the diaphragm assembly.
Key Benefits- High Current Capacity: The 15A SPDT switch directly manages most small motor and heater loads without additional components.
- Visual Calibration: An enclosed scale and visible indicator allow for precise set point adjustment and easier troubleshooting.
- Industrial-Grade Construction: Zinc-plated 16-gauge steel housing provides durability in demanding mechanical rooms.
- Precise Low-Range Sensing: A large diaphragm surface area ensures an approximate deadband of 0.07 to 0.25" w.c. for tight control loops.
- Versatile Media Compatibility: Rated for use with air, nitrogen, helium, and other non-corrosive, non-combustible gases.
Does this switch require a specific mounting position?
Yes, for the factory calibration and differential air pressure accuracy to remain valid, the unit must be mounted with the diaphragm in a vertical plane. Horizontal mounting will shift the set point due to the weight of the diaphragm.
What is the maximum pressure this switch can withstand?
The 1638-5 is rated for a continuous pressure of 10 psig and a maximum surge pressure of 25 psig. Exceeding these limits can damage the silicone diaphragm or the internal linkage.
Can I use this for both high and low pressure applications?
The SPDT switch configuration allows you to wire the unit for normally open or normally closed operation, making it suitable for both pressure-rise and pressure-drop detection in HVAC ductwork.
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.
