Dwyer 1638 Series Precision Pressure Switch for HVAC Systems

Dwyer 1638 Series Precision Pressure Switches

Product Introduction

and 1638-5, these switches are ideal for HVAC systems, process control, and industrial applications requiring accurate pressure activation.

Product Features

Visible Set Point Indicator

A clear, easy-to-read dial allows real-time visualization of the pressure set point, simplifying initial setup, operation, and troubleshooting. This feature reduces downtime by enabling quick identification of activation thresholds without additional tools.

Large Diaphragm for Low-Range Accuracy

The switches utilize a large diaphragm design to deliver precise pressure sensing in low ranges, ensuring reliable activation at exact pressure points. This makes them suitable for applications where minor pressure fluctuations require responsive control, such as fan coil systems, air handlers, or fluid level monitoring.

High Current Load Capability

With the ability to support current loads up to 15 amps, the 1638 Series eliminates the need for additional relays or components in most small electrical systems. This simplifies wiring in HVAC installations, pump control, and process equipment, reducing installation costs and complexity.

Versatile Model Selection

Available models cover a range of pressure spans to match diverse application needs:

1638-0: Ultra-low range for delicate pressure sensing

1638-1/2/5/10: Graduated ranges for medium to higher low-pressure applications

Rugged Construction

Built to withstand industrial environments, the switches offer durable performance in HVAC ducts, process lines, and mechanical systems.

Applications

Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of measuring instruments , located in China xi’an City. Since 2008, Xi'an Kacise focused on the development and production of pressure, level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical and management personnel, through efforts of our entire staff, we have become a professional measuring instrument manufacturer and solution provider. And we are continuously trying to improve product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE, intrinsic safety explosion-proof and isolated safety explosion-proof certificates, etc. which ensure that our products comply with international standards.

Kacise sensors have already been exported to America, Spain, Australia, Chile and 20 other countries and regions, and received many favorable feedbacks. Our overseas distributers are also increasing. We regard “reasonable prices, efficient production time and good after-sales service” as our tenet, and hope to cooperate with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices, and provides industry-leading customer service. We personally get to know each of our customers, and we know how to discover the most valuable part of our business , to help others achieve their goals.