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See Detail for PDF and Specifications for more information. 1620 Single and Dual Pressure Gage is one of Dwyer's "Old Faithful Switch" design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Models 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. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

Try out Dwyer's highest precision 1630 Large Diaphragm Differential Pressure Switch Visual Set Point Adjustment in 5 Standard Ranges, 0.05" to 12" w.c. Repetitive Accuracy within ±1%Pressure Switches
Provides maximum dependability. a visible set point indicator for added maximum convenience. CAUTION: Use Only with Air or Compatible Gages/Gauges.

1640 Floating Contact Null Switch for High and Low Actuation is a unique electric switch design by Dwyer Instrument, Inc. innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the Series 1630 switches. The Model 1640, however, is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

1800 Low Differential Pressure Switches for General Industrial Service, set Points from 0.07" to 85" w.c., Repetitive Accuracy within 2%, UL and CSA listed, FM approved. Essential for industrial environments, small size and low price with 2% repeatability for enough accuracy for all but the most demanding applications. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

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(SEE Details for PDF Specifications) 1900 Compact Low Differential Pressure Switches, Dwyer Instruments most popular series combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluid, refrigeration, oven and dryer applications. 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. Internal location helps prevent tampering. UL, CE and CSA listed, and FM approved. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

43000 Capsu-Photohelic Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic gage. The Capsu-Photohelic switch/gage employs an encapsulated sensing element for use with both liquids and gases at pressures to 500 psig (34 bar).

Optional cast brass case is available for water or based liquids.

This item is entered separately in order to add more than 1 options to cart and/or purchase separately. Air Filter Kit Accessory package for using switches to measure the resistance of air flow through filters without a gage include 2 pressure tips with intergral compression fitting, 2 5f lengths of 1/4 aluminum tubing and 2 1/8" NPT to 1/4 tubing compression fittings.

See Details for PDF Specifications. A3000 is a 3-in-One Indicating Gage, Lo-limit and Hi-Limit Control Set points are instantly adjusted with front knobs. Photohelic® Switch/Gages function as versatile, highly repeatable pressure switches combined with a precise pressure gage employing the time-proven Magnehelic® gage design.

Dwyer A4 Differential Pressure Switch Adjustable Set Point, High Overpressure
Rugged Series A4 Differential Pressure Switch offers field adjustments and can handle system pressures up to 6000 psig. Piston design allows mounting in any orientation. The switch is capable of carrying moderate shock and vibratory loads. Application: Compatible gases.

Dwyer's Accessories Models for Static Pressure Sensors are for use with:

Manometers

Magnehelic® Gages

Pressure Switches

Controllers to pick up or sense static pressure drop across air filters and cooling coils, blower input and discharge pressures, etc.