




Dwyer Instruments 1900-5-MR | Compact Low Differential Pressure Switch | 1.40-5.5in w.c. | Manual Reset
The sophisticated design and meticulous construction of our most well-liked Series 1900 Compact Low Differential Pressure Switch enable these switches to carry out many of the functions of larger, more expensive units. In addition to serving several fluidics, refrigerator, oven, and dryer applications, they are made for air conditioning services. The Series 1900 switches feature set points ranging from 0.07 to 20" w.c. (1.8 to 508 mm) for air and non-combustible compatible gases. The range screw, which is placed inside the conduit enclosure, makes set point adjustment simple. A position that is internal deters tampering. FM approved, UL, CE, and CSA listed.

Free UAE shipping available
- Specifications
- Features
- Downloads
Ambiant temperature | -30-180 °F |
Approvals | CE |
Connection | Electrical: Screw Terminals |
Connection | Process: 1/8 NPT Female |
Gross weight | 0.97 lbs |
Net weight | 0.775 lbs |
Pressure Range | 10 Bar |
PRESSURE | Gauge Proof: 500 psig |
Series | Family: Dwyer Instruments Pressure Switches, 1900 Series |
Series | Product: 1900 |
Type | Contact: SPDT |
Type | Pressure Switch |
- Numerous industrial and OEM applications benefit from the high-value switch that is compact in size and repeatable.
- Numerous types, ranging from 0.07 in. to 20 in., can satisfy the strict OEM requirements for a low pressure switch.
- Simpler adjustments are made possible by the range screw enclosed inside enclosure, which also deters tampering.
Related Products

Dwyer Instruments DA-7031-153-7 | Pressure Switch

Dwyer Instruments DA-7031-153-7 | Pressure Switch

Dwyer Instruments CXA-S3 | 35-150 PSI | 1/4NPT | Pressure Switch

Dwyer Instruments CXA-S3 | 35-150 PSI | 1/4NPT | Pressure Switch

Dwyer Instruments DHC-209 | DIFFERENTIAL 489.00 35.0 317.85 | PRESSURE CONTROLLER RANGE 10.0 WC

Dwyer Instruments DHC-209 | DIFFERENTIAL 489.00 35.0 317.85 | PRESSURE CONTROLLER RANGE 10.0 WC

Dwyer Instruments CX-42 | 35-150 PSI 1/4 (4) | Pressure Switch

Dwyer Instruments CX-42 | 35-150 PSI 1/4 (4) | Pressure Switch

Dwyer Instruments CS-150 | Diaphragm Pressure Switch

Dwyer Instruments CS-150 | Diaphragm Pressure Switch

Dwyer Instruments A4-4 | 35-160 PSID INC | Pressure Switch

Dwyer Instruments A4-4 | 35-160 PSID INC | Pressure Switch

Dwyer Instruments A1F-O-SS-1-3 | Pressure Switch

Dwyer Instruments A1F-O-SS-1-3 | Pressure Switch

Dwyer Instruments A1F-O-SS-1-1 | Pressure Switch

Dwyer Instruments A1F-O-SS-1-1 | Pressure Switch