Description

Series 1950G Explosion-proof Differential Pressure Switch, Explosion-proof, Weatherproof, Compatible with Natural Gases

 

DWYER Series 1950G Differential Pressure Switch combines the best features of the popular Dwyer® Series 1950 Pressure Switch with the benefit of natural gas compatibility. DWYER Series 1950G Differential Pressure Switch Units are rain-tight for outdoor installations, and are UL listed for use in Class I, Groups A, B, C, & D; Class II, Groups E, F, & G and Class III atmospheres, Directive 2014/34/EU (ATEX) Compliant for 2813 II 2G Ex db IIB+H2 T6, CSA & FM approved for Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G and Class III atmospheres. IECEx Ex db IIB+H2  T6 (-40°C<Ta<+60°C). The 1950G is very compact, about half the weight and bulk of equivalent conventional explosion-proof switches.

Product Applications

• Natural gas applications
• Process applications
• All-weather applications

 

Features

• Compatible with natural gas
• External set point screw provides easy access that simplifies making adjustments without opening or disassembling enclosure
• Easily accessible electrical connection simplifies the installation

 

Specifications

• Service: Air and compatible combustible gases.
• Wetted Materials: Consult factory.
• Temperature Limits: 0 to 140°F (-17 to 60°C). Note: Set point drift may occur with ambient temperature changes.
• Pressure Limits: 45″ w.c. (11.2 kPa) continuous; 10 psig (68.95 kPa) surge.
• Enclosure Rating: NEMA 3 (IP54), NEMA 7 and 9.
• Switch Type: 1 Form C relay (SPDT).
• Electrical Rating: 10 A, 120/240 VAC, 28 VDC. Resistive 50 mA, 125 VDC.
• Power Requirements: 24 VDC ±10%. 120 or 240 VAC ±10% optional.
• Electrical Connections: Internal terminal block.
• Process Connections: 1/8″ female NPT.
• Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.
• Set Point Adjustment: Screw type on top of housing.
• Weight: 2 lbs 15.7 oz (1.35 kg).
• Agency Approvals: ATEX, CE, CSA, FM, IECEx, UL.

 

Models & Ordering

 

120 VAC

Model	Description
1950G-0-B-120-NA	Explosion-proof differential pressure switch, range .15-.50″ w.c., approx. deadband @ min. set point .06, approx. deadband @ max. set point .11.
1950G-00-B-120-NA	Explosion-proof differential pressure switch, range .07-.15″ w.c., approx. deadband @ min. set point .04, approx. deadband @ max. set point .06.
1950G-1-B-120-NA	Explosion-proof differential pressure switch, range .4-1.6″ w.c., approx. deadband @ min. set point .11, approx. deadband @ max. set point .29.
1950G-10-B-120-NA	Explosion-proof differential pressure switch, range 3-11″ w.c., approx. deadband @ min. set point .9, approx. deadband @ max. set point 1.8.
1950G-20-B-120-NA	Explosion-proof differential pressure switch, range 4-20″ w.c., approx. deadband @ min. set point 1.2, approx. deadband @ max. set point 3.0.
1950G-5-B-120-NA	Explosion-proof differential pressure switch, range 1.4-5.5″ w.c., approx. deadband @ min. set point .4, approx. deadband @ max. set point .9.

 

24 VDC

Model	Description
1950G-0-B-24-NA	Explosion-proof differential pressure switch, range .15-.50″ w.c., approx. deadband @ min. set point .06, approx. deadband @ max. set point .11.
1950G-00-B-24-NA	Explosion-proof differential pressure switch, range .07-.15″ w.c., approx. deadband @ min. set point .04, approx. deadband @ max. set point .06.
1950G-1-B-24-NA	Explosion-proof differential pressure switch, range .4-1.6″ w.c., approx. deadband @ min. set point .11, approx. deadband @ max. set point .29.
1950G-10-B-24-NA	Explosion-proof differential pressure switch, range 3-11″ w.c., approx. deadband @ min. set point .9, approx. deadband @ max. set point 1.8.
1950G-20-B-24-NA	Explosion-proof differential pressure switch, range 4-20″ w.c., approx. deadband @ min. set point 1.2, approx. deadband @ max. set point 3.0.
1950G-5-B-24-NA	Explosion-proof differential pressure switch, range 1.4-5.5″ w.c., approx. deadband @ min. set point .4, approx. deadband @ max. set point .9.