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Series AT-1800 ATEX/IECEx Approved Low Differential Pressure Switch

Series AT-ADPS ATEX/IECEx Approved Differential Pressure Switch

Series 1950G Explosion-Proof Differential Pressure Switch

Explosion-proof, Weatherproof, Compatible with Natural Gases

Series 1950G Explosion-Proof Differential Pressure Switch combines the best features of the popular Dwyer® Series 1950 Pressure Switch with the benefit of natural gas compatibility. 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.
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. A captive screw allows the cover to swing aside while remaining attached to the unit. Adjustment to the set point of the switch can be made without disassembly of the housing.

Product Applications

Natural gas applications
Process applications
All-weather applications

Starting at $564.60

Ordering

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120 VAC

24 VDC

Grouped product items
Model	Description	Availability*	Price
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60
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	1-3 days*	$564.60
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.	1-3 days*	$564.60
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.	1-2 Weeks*	$564.60
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60
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.	1-3 days*	$564.60

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).
Compliance:: ATEX, CE, CSA, FM, IECEx, UL.

Features

Support Library

Approvals

Drawings

Model Chart

EXAMPLE	1950G	00	B	120	AT	Series 1950G-00-B-120-AT Explosion-proof Differential Pressure Switch, range 0.07-0.15" w.c., Buna-N diaphragm, 120 VAC supply voltage, with aluminum tag.
SERIES	1950G					Explosion-proof Differential Pressure Switch
RANGE		00 0 1 5 10 20				0.07-0.15" w.c. 0.15-0.5" w.c. 0.4-1.6" w.c. 1.4-5.5" w.c. 3.0-11.0" w.c. 4.0-20.0" w.c.
DIAPHRAGM			B			Buna-N
INPUT VOLTAGE SUPPLY				120 240 24		120 VAC 240 VAC 24 VDC
OPTIONS					AT NA PRESET ST	Aluminum Tag Non-ATEX Approved Preset Stainless Steel Tag

FAQ

Questions

Question

Does Dwyer offer a fully UL/FM/CSA approved explosion proof pressure switch?

Answer

Yes. The 1950 and 1950G Series.

Related

Series 1950

Series 1950G

Question

What is the power consumption of a 24 VDC 1950G Pressure Switch?

Answer

The Current Draw for the 1950G 120mA @ 24VDC 30mA @ 120 VAC 15mA @ 240 VAC

Related

Series 1950G

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