Instrumentation
	Pressure	Switches
	Compact Low Differential Pressure Switch  1900				Ultra Sensitive Pressure Switch       PQ
		Set Points from 0.07" to 20" w.c.,				Large Diaphragm, Magnetic Mercury
		Repetitive Accuracy within 3%.				Switch. Optional enclosures are
		Designed for air conditioning service,				offered for outdoor applications
		they also serve many fluidics,				needing weather resistant
		refrigeration, oven and dryer				construction (PQW) or where
		applications. UL, CE and CSA listed,				hazardous conditions demand the
		and FM approved.				ex-proof protection provided by the
		FOR USE ONLY WITH AIR OR				PQE series. The latter is rated for
		COMPATIBLE GASES.				Class I,Group C/D;Class II,Group E,F,G
	Explosion-proof Differential Pressure Switch				Explosion-proof Differential Pressure Switch
		1950				1950G
		Compact, Low Cost, Explosion-proof				Compatible with Natural Gases. Units
		and Weatherproof.				are rain-tight for outdoor installations.
		set points from 0.3 to 20"w.c. and				Easy access to the SPDT relay and
		from .5 to 60 psi. For use only with air				power supply terminals is provided
		or compatible gases. Applications				by removing the top plate of the
		with hazardous atmospheres and a				aluminum housing. A supply voltage
		single positive pressure may require				of 24  VDC, 120  or  240 VAC  is
		special venting.				required.