Differential pressure switch, range 4-20" w.c., approx. deadband @ min. set point 0.40, approx. deadband @ max. set point 0.60.
Series 1950 Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer® Series 1900 Pressure Switch with an integral explosionproof and weatherproof housing, making it an exceptional value for either application. It is CE, UL and CSA listed, FM approved for use in Class I, Div 1, Groups C and D, Class II Groups E, F, and G and Class III hazardous atmospheres NEMA 7 and 9. Rain tight NEMA 3 (IP54), weatherproof features include a drain plug and O-ring seal in cover. Electrical connections are easily made by removing front cover. For convenience the set point adjustment screw is located on the outside of the housing. Twelve models offer set points from .03 to 20 in w.c. (0.0075 to 5 kPa) and from .5 to 60 psi (0.035 to 3.5 bar). The unit is very light and compact - about half the weight and bulk of other explosion-proof or weatherproof switches with separate enclosures.
Easy access to the SPDT switch for electrical hook-up is provided by removing the top plate of the three-part aluminum housing. Adjustment to the set point of the switch can be made without disassembling the housing. The unit is very compact, about half the weight and bulk of equivalent conventional explosion-proof switches.
- Explosion-proof and weatherproof housing provides device protection for outdoor use or harsh environment operation
- External set point screw provides easy access that simplifies making adjustments without opening or disassembling enclosure
- Easily accessible electrical connection simplifies the installation
- Compliance: CE, CSA, FM, UL
- Deadband: 0.4 to 0.6 inH²O
- Electrical Connection: Screw Terminal
- Enclosure Ratings: IP54, NEMA Type 3, NEMA Type 7, NEMA Type 9
- Materials, Wetted: Consult Factory
- Measurement Pressure Type: Differential
- Measurement Pressure, Max: 20 inH²O
- Measurement Pressure, Min: 4 inH²O
- Media Compatibility: Air, Argon, Carbon dioxide, Helium, Nitrogen, Non-Corrosive Dry Gases
- Mounting Orientation: Vertical Diaphragm
- Operating Temperature, Max: 140 °F
- Operating Temperature, Min: -40 °F
- Process Connection Size: 1/8 in
- Process Connection Type: NPT Female
- Proof Pressure: Up to 45 inH²O
- Set Point Adjustment: External Screw
- Switch Note: Mica silver (STD) and phenolic silver: 15A @ 125, 250, 480 VAC, 60Hz; Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC; Phenolic gold: 1A 125, VAC, 60Hz
- Switch Rating: Mica silver (STD) and phenolic silver: 15A @ 125, 250, 480 Vac, 1/8 HP @ 125 Vac, 1/4 HP @ 250 Vac; Phenolic gold: 1A @ 125 Vac
- Switch Type: SPDT NO/NC, Selectable
- Weight: 1.5 kg
Applications
- HVAC applications
- Process applications
- All-weather applications
