Dwyer 1900 Series Compact Low Differential Pressure Switches

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Dwyer 1900 Series Compact Low Differential Pressure Switches

Price 16800 INR/ Piece

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MOQ : 2 Pieces

Dwyer 1900 Series Compact Low Differential Pressure Switches Specification

Seal Material
Diaphragm: Silicone or Buna-N

Sensor Type
Differential Pressure

Thread
1/8 NPT Female Pressure Connections

Display
Non-Display

Grade
Industrial

Outer Size
70 x 94 x 39 mm (approx)

Material
Die cast aluminum housing, Polycarbonate cover

Processing Type
Factory-Fixed Set Point (Field adjustable option available)

Mount Type
Surface or Vertical Mount

Scale Range
0.03 to 20 in. w.c. (7.5 to 5,000 Pa)

Accuracy
2% of Set Point

Finishing
Textured Gray Epoxy-Coated Housing

Accessories
Two mounting screws, Two pressure barbs, Instruction manual

Maximum Pressure
28 in. Hg (950 mbar)

Repeatability
1% of Full Scale

Electrical Rating
15 A @ 125/250/480 VAC, 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC

Typical Applications
Air proving in ducts, fans, blowers, filter monitoring, high/low limit control

Enclosure Protection
NEMA 1 (IP20)

Agency Approvals
UL, CSA, CE

Temperature Range
-30 to 140F (-34 to 60C)

Set Point Adjustment
Screw-type external adjustment

Switch Type
SPDT Snap Switch

Weight
Approx. 170 g

Dwyer 1900 Series Compact Low Differential Pressure Switches Trade Information

Minimum Order Quantity
2 Pieces

Payment Terms
Cash Against Delivery (CAD), Cash in Advance (CID), Cash Advance (CA), Cash on Delivery (COD)

Main Export Market(s)
Asia

Main Domestic Market
All India

About Dwyer 1900 Series Compact Low Differential Pressure Switches

Dwyer 1900 Series Compact Low Differential Pressure Switches

For air and non-combustible compatible gases, Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure and prevents tampering. UL, CE and CSA listed, and FM approved.

Dwyer 1900 Series Offers

Features

Oversized check valves for smooth controlled operation
Mash proof vent valve (no needle valve)
Patented non-oil based lubricants used on all moving parts
Dual O-rings on all pistons to ensure zero leakage

Applications

Air conditioning refrigeration coil icing detection; defrost cycle initiation
Clogged filter detection
Variable air volume controller

Reliable Differential Pressure Switching

Engineered for industrial precision, the Dwyer 1900 Series offers reliable switching performance for low differential pressures. Its robust snap switch mechanism and factory-set or field-adjustable set points ensure dependable operation, making them suitable for safety-critical control and monitoring applications.

User-Friendly Design and Installation

Featuring screw-type external set-point adjustment and clear, textured Gray epoxy-coated housing, these switches are both durable and easy to operate. The included accessories, such as mounting screws and pressure barbs, simplify installation for both surface and vertical mounting configurations.

Wide Range of Applications

From air proving in ducts and blower systems to monitoring steam, oil, or gas lines, the 1900 Series adapts to numerous environments. Its compact form factor and high repeatability support use in tight spaces where dependable performance is crucial.

FAQ's of Dwyer 1900 Series Compact Low Differential Pressure Switches:

Q: How do I adjust the set point on the Dwyer 1900 Series Pressure Switch?

A: The set point can be easily modified using the screw-type external adjustment provided on the switch. Simply turn the adjustment screw until the desired trigger point is reached. For field-adjustable models, this process allows you to tailor sensitivity to suit your application requirements.

Q: What types of systems can I use the 1900 Series switch with?

A: The switch is suitable for monitoring differential pressure in a variety of systems, including air ducts, fans, blowers, filters, as well as installations that handle steam, oil, and gas. Its NEMA 1 (IP20) rating makes it ideal for indoor industrial environments.

Q: When should I choose a 1900 Series over other pressure switches?

A: Select the 1900 Series when you require precise differential pressure monitoring and high repeatability (1% of full scale) in spaces with limited room. Its compact size, adjustable set point, and broad agency approvals make it ideal for both new installations and retrofit projects.

Q: Where should the Dwyer 1900 Series be mounted for optimal performance?

A: This switch can be surface or vertically mounted, depending on application needs. Always follow the installation instructions provided in the manual for secure and accurate placement, ensuring the pressure connections are properly aligned and supported.

Q: What is the benefit of the 1900 Series' SPDT snap switch?

A: The Single Pole Double Throw (SPDT) snap switch delivers quick and reliable contact action, supporting both control and alarm functions. It allows for direct connection to control circuits, making your system more responsive and dependable.

Q: How does the 1900 Series handle over-pressure situations?

A: With a maximum pressure capability of 28 in. Hg (950 mbar), the 1900 Series is built to withstand temporary over-pressures within its rated limits. However, maintaining operation within the recommended range helps ensure long-term accuracy and switch lifespan.

Q: What accessories are provided with the Dwyer 1900 Series switch?

A: Each switch package includes two mounting screws, two pressure barbs for pressure connection, and a detailed instruction manual to guide your installation and setup process.

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