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Dwyer 1620 Series Single and Dual Pressure Switches

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Dwyer 1620 Series Single and Dual Pressure Switches

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MOQ : 1 Piece

Dwyer 1620 Series Single and Dual Pressure Switches Specification

Display
No Display (Switch Only)

Seal Material
Nitrile Rubber

Grade
Industrial

Outer Size
Enclosure: 5 x 2 x 3 (approx.)

Thread
1/8 NPT Female

Sensor Type
Mechanical Diaphragm

Material
Die Cast Aluminum Housing

Processing Type
Factory Assembled

Mount Type
Surface (Wall) Mount

Scale Range
.15-1.5" w.c

Accuracy
2% of Full Scale

Finishing
Epoxy Coated Die Cast

Measure Pressure Of
Gas

Accessories
Mounting Screws, Instruction Manual

Deadband
Fixed or Adjustable, Model Dependent

Set-Point Adjustment
Screwdriver Adjustable

Agency Approvals
UL, CE

Mounting Orientation
Vertical, Diaphragm Down

Repeatability
1% of Set Point

Electrical Rating
15A @ 120-480 VAC; 1/8 HP @ 125-250 VAC

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

Pressure Ratings
Single & Dual Set-Point Models Available

Weight
Approximately 2 lb (0.9 kg)

Typical Applications
Fan control, Filter monitoring, Duct static pressure, Air flow proving

Contact Type
Single-Pole, Double-Throw (SPDT)

Enclosure Rating
NEMA 4X

Dwyer 1620 Series Single and Dual Pressure Switches Trade Information

Minimum Order Quantity
1 Piece

Payment Terms
Cash Against Delivery (CAD), Cash on Delivery (COD), Cheque, Telegraphic Transfer (T/T), Paypal, Delivery Point (DP), Cash Advance (CA)

Main Export Market(s)
Western Europe, Australia, North America, Eastern Europe, Middle East, Central America, Africa, South America, Asia

Main Domestic Market
All India

About Dwyer 1620 Series Single and Dual Pressure Switches

Dwyer 1620 Series Single and Dual Pressure Switches

High Reliability, Repetitive Accuracy within 1%

On the Series 1620 Single and Dual Pressure Switch, our old faithful switch design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single electric switch and Model 1627 has dual electric switches. Model 1627 can therefore provide dual control when required. It can be set to open or close two independent electrical circuits, each preset for its own actuation pressure. Both units have diaphragm sealed motion take outs providing maximum protection against leakage.

CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

Product Applications

Damper positioning
Duct air control

Features

Up to 3900 readings can be saved
Entire memory can be read out in only 10 seconds
Watertight housing (IP65)
Com Soft 3 Basic Windows-compatible software facilitates graphs and tables, prints data, smoothes measurement curves, targeted value observation using cross hair function as well as logger programming and setting of limit values
Data transfer via serial interface

Specifications

Service: Air and non-combustible, compatible gases
Wetted Materials: Consult factory
Temperature Limits: -30 to 130F ( -34.4 to 54.4C)
Pressure Limits: Max. 50 in. w.c. (12.44 kPa) continuous, 2 psig (13.79 kPa) surge
Switch Type: 1626, Single-pole doublethrow (SPDT); 1627, two Single-pole double-throw (SPDT)
Repeatability: 1%
Electrical Rating: 15 A @ 120-480 VAC, 60 Hz. Resistive, 1/8 HP @ 125 VAC,1/4 HP @ 250 VAC, 60 Hz
Electrical Connections: 3 screw type, common, normally open and normally closed
Process Connections: 1/8" female NPT
Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations
Set Point Adjustment: Screw Adjustment

Robust Construction for Demanding Environments

Engineered with a die-cast aluminum housing and sealed with nitrile rubber, the 1620 Series is built to withstand harsh industrial settings. The epoxy coating and NEMA 4X rating guarantee protection against dust, corrosion, and water, ensuring longevity and reliable performance. Its compact size and vertical mounting configuration facilitate easy installation in tight spaces.

Precise Control and Versatile Adjustability

With screwdriver-adjustable set-points, the Dwyer 1620 switches provide repeatable accuracy within 1% of the set value, ideal for applications requiring strict monitoring, such as HVAC systems and airflow proving. Dual and single set-point options cater to a variety of operational needs, while adjustable deadbands offer flexibility for process optimization.

Certified Safety and Broad Compatibility

UL and CE approvals make the Dwyer 1620 suitable for global industrial standards. The switches feature robust electrical ratings-up to 15A at 120-480 VAC-and are compatible with standard 1/8 NPT process connections. Their mechanical diaphragm sensors ensure reliable operation without the need for displays, simplifying maintenance and operation.

FAQ's of Dwyer 1620 Series Single and Dual Pressure Switches:

Q: How do I adjust the set-point on the Dwyer 1620 pressure switch?

A: The set-point on the Dwyer 1620 pressure switch is easily adjustable using a standard screwdriver. Simply locate the adjustment screw, typically accessible from outside the enclosure, and turn it to achieve your desired pressure setting within the switch's operating range.

Q: What environments are suitable for installing the 1620 Series pressure switches?

A: These pressure switches are ideal for industrial settings, thanks to their NEMA 4X, epoxy-coated enclosure that protects against dust, water, and corrosion. They are suitable for indoor and outdoor applications where operating temperatures remain between -30 and 140F (-34 to 60C).

Q: When should I use a single versus a dual set-point model?

A: Single set-point models are suited for applications needing straightforward on/off control at a specific pressure, such as basic fan control. Dual set-point models are recommended when two independent switching actions are required, such as for high/low alarms or complex process automation.

Q: Where should the pressure switch be mounted for optimal operation?

A: For optimal performance, mount the Dwyer 1620 vertically with the diaphragm facing downward. Surface or wall mounting using the provided screws ensures stable positioning and accurate pressure measurement.

Q: What gases can the 1620 Series pressure switches measure?

A: These switches are designed for use with air and compatible gases. The nitrile rubber seal and die-cast aluminum housing provide chemical resistance, but ensure the measured gas does not contain corrosive substances that could damage these materials.

Q: What are the main benefits of using the 1620 Series for my application?

A: Key benefits include high accuracy (2% of full scale), repeatable set-point adjustment, rugged construction, and broad agency approvals (UL, CE). These features deliver reliable operation, simplified installation, and compatibility with global standards in demanding industrial processes.

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