Series ADPS/EDPS Differential Pressure Switch With Dual Scale Field Adjustable Set Point Knob. The Series ADPS/EDPS Adjustable Differential Pressure Switch is designed for pressure, vacuum, and differential pressures. The dual scaled adjustment knob in inches water column and pascals allows changes to the switching pressure to be made without a pressure gage.

Series 1950 Explosion-Proof Differential Pressure Switches. Specifications - Installation and Operating Instructions. Bulletin E-57.

A normally open type manual reset switch such as Dwyer®Instruments, Inc. Part No. A-601 is connected to the terminals in Sections B and C. The circuit must be "armed by momentarily closing the switch while the black pointer is to the right of the set point.

Manual Reset Model 1900-MR - includes special snap switch which latches on pressure increase above the setpoint. Switch must be manually reset after pressure drops below the setpoint. To order change base model to 1900 and add MR suffix after range number. Example: 1900-10-MR. Available on -1, -5, -10 or -20 ranges only.

Add to Wish List Add to Compare. Dwyer 1900 Series Low Differential Pressure Switch for Air or Non-Combustible Gas; Repeatability ±3%; Single SPDT Output. 1/8" NPTF Process Connection. Three Screw-Type Electrical Connections: Common, N/O, and N/C. Screw-Type Setpoint Adjustment Inside Conduit Enclosure. Includes Manual Reset Option.

The Dwyer 1900-5-MR Compact Low Differential Pressure Switch 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 fluidics, refrigeration, oven and dryer applications.

The 1950G is very compact, about half the weight and bulk of equivalent conventional explosion-proof switches. Easy access to the SPDT relay and power supply terminals is provided by removing the top plate of the aluminum housing. A supply voltage of 24 VDC, 120 or 240 VAC is required.

The Series DHC Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with both current and voltage outputs. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time, and cost.

Series DH3 Digihelic® Differential Pressure Controller Bulletin B-30 ® DWYER INSTRUMENTS, INC. P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Phone: 219/879-8000 Fax: 219/872-9057 dwyer-inst.com e-mail: [email protected]. SWITCH SPECIFICATIONS Switch Type: 2 SPDT relays. Electrical Rating:

Suitable for air and many other non-combustible gasses. Compact and low cost design; Simple design, volt free contact design; Optional manual reset and gold 

In this cooling application, the Dwyer differential pressure switch senses the increasing restriction to air flow caused by icing and actuates the defrost cycle. Two static tips are