Dwyer Adjustable Set-Point Air Pressure Switch
The Dwyer Large Diaphragm Pressure Switch: Adj is an adjustable set-point air pressure switch with a range of 0.2 in wc to 1 in wc and SPDT switching. It features a 1/8 in sample line connection size (MPN 1638-1).
SKU 3G-OTH-68359
Also listed as: 16381 · 1638 1
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The Dwyer Large Diaphragm Pressure Switch: Adj is an adjustable set-point air pressure switch with a range of 0.2 in wc to 1 in wc and SPDT switching. It features a 1/8 in sample line connection size (MPN 1638-1).
Frequently Asked Questions
What is the Dwyer 1638-1 large diaphragm pressure switch used for?
The Dwyer 1638-1 is an adjustable set-point air pressure switch used to monitor low differential air pressure in HVAC, cleanroom, and industrial ventilation systems. It actuates an SPDT electrical contact when pressure reaches the set point between 0.2 in wc and 1 in wc.
What are the specifications of the Dwyer 1638-1 pressure switch?
The Dwyer 1638-1 is an adjustable large diaphragm pressure switch with a set-point range of 0.2 in wc to 1 in wc, SPDT contact, and a 1/8 in sample line connection size. It is manufactured by Dwyer and carries MPN 1638-1.
Where to buy the Dwyer 1638-1 pressure switch worldwide?
3G Electric supplies the Dwyer 1638-1 pressure switch worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this adjustable air pressure switch.
How to install the Dwyer 1638-1 large diaphragm pressure switch?
Mount the Dwyer 1638-1 in a clean, dry location with the diaphragm vertical. Connect the 1/8 in sample line to the pressure source. Adjust the set-point screw to the desired trip pressure between 0.2 in wc and 1 in wc. Wire the SPDT contacts per your control circuit.
Used in
Common applications for DwyerDwyer Products
3G Electric supplies Dwyer adjustable set-point air pressure switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
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Compatible alternatives & equivalents
- Dwyer Adjustable set-point air pressure switch with SPDT contact configuration. Set-point range 0.15 to 1.5 in wc. 1/8 in NPT sample line connection. Operates at 120 to 480V AC. Used for monitoring or controlling air pressure in HVAC and industrial air-handling systems
- Dwyer This adjustable set-point air pressure switch from Dwyer has a range of 3 to 12 inches of water column. It features a single-pole double-throw (SPDT) switching action and operates at 125V AC. The switch includes a 1/8 inch sample line connection and is housed in a conduit box enclosure. It is used in HVAC and industrial process systems to monitor or control air pressure, actuating an alarm or control function when the set point is reached
