Dwyer 475-1-FM Manometer 20-inch WC Intrinsically Safe FM Approved

Dwyer 475-1-FM Digital Manometer, 20 inch WC, Intrinsically Safe, Dual Pressure

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The Dwyer 475-1-FM Manometer 20-inch WC Intrinsically Safe FM Approved is an excellent manometer for measuring positive, negative, and differential natural gas or air pressure in hazardous locations.

MFG Part No.: Spring-Summer

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Dwyer 475-1-FM Manometer 20-inch WC Intrinsically Safe FM Approved measures negative, positive, and differential pressures of natural gases and air from 0 to 20.000 in w.c. The Dwyer 475-1-FM also measures air velocity when used with a pitot tube. The Dwyer 475-1-FM features durable aluminum housing, a clear display, automatic zero button, and is intrinsically safe to use in hazardous locations.

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Characteristics:	Dwyer 475-1-FM Manometer 20-inch WC Intrinsically Safe FM Approved
	Positive, negative, and differential pressure measurements
	Measures differential pressure of natural gases and air from 0 to 20.000 in w.c.
	Measures air velocity when used with a pitot tube (not included)
	Durable aluminum housing protects the instrument in harsh environments
	Switch between English and metric units
	Field replaceable metal tips
	Auto Zero
	Intrinsically safe to use in hazardous locations (Class 1, Div 2, Groups A, B, C, D, T4 Ta = 70°C)
	*Upgradeable to air velocity kit and/or NIST certificate

Specifications:	Dwyer 475-1-FM Manometer 20 inch WC Intrinsically Safe
Service:	Air and compatible combustible gases
Wetted Materials:	Consult factory
Accuracy:	±0.5% FS, 60 to 78°F (15.6 to 25.6°C); ±1.5% FS from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C)
Pressure Hysteresis	±0.1% FS
Temperature Limits:	0 to 140°F (-17.8 to 60°C)
Compensated Temperature Limits:	32 to 104°F (0 to 40°C)
Storage Temperature Limits:	-4 to 176°F (-20 to 80°C)
Display:	0.42? (10.6 mm) 4 digit LCD
Power Requirements:	9 V alkaline battery, installed non-functional, user replaceable
Weight:	10.8 oz (306 g)
Process Connections:	Two barbed connections for use with 1/8? (3.18 mm) or 3/16? (4.76 mm) ID tubing. Two compression fittings for use with 1/8? (3.18 mm) ID x 1/4? (6.35 mm) OD tubing for 475-7 & 475-8 only
Agency Approvals:	CE, FM approved to Class I, Div 2, Groups A, B, C, D, T4 Ta = 70°C
Model Specific Specifications: 475-1-FM
English Range	Metric Range	Maximum Pressure
0 to 20.000 in w.c.	4.982 kPa	10 psig

Applications:	Dwyer 475-1-FM Manometer 20-inch WC Intrinsically Safe FM Approved
	HVAC technicians and contractors
	Check natrual gas input to furnaces, boilers, and other gas-fire units
	Gas, static, and differential pressures
	Test and calibrate pressure switches
	Diagnose AC system issues

Dwyer 475-1-FM Digital Manometer, 20 inch WC, Intrinsically Safe, Dual Pressure

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