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Handheld Digital Manometer measures positive, negative and differential pressures. It is housed in rugged, extruded aluminum case. It is lightweight, fast and easy-to-use and is featured with selectable English/metric units. Also, it is FM approved. Our Glass Level Indicator is ideal for field calibration, monitoring or trouble shooting HVAC systems, clean rooms, or a wide range of other low pressure pneumatic systems. This handy instrument measures positive, negative or differential pressures of air and natural gases in ranges from 1 in. W.C. (0.249 kPa) to 150 PSID (10.34 bar). The Series 475-FM is approved and is intrinsically safe for hazardous locations, Class 1, Div. 1, Group A, B, C, D, T4. It’s simple operation and easy-to-read digital display makes it an indispensable test instrument for the plant engineer, industrial hygienist and HVAC technician. When used with a Dwyer® Pitot tube (see Flow and Air Velocity), the Series 475-FM Mark III can also be used as an air velocity gage. See the complete 475-1-FM-AV kit described below.
The Series 475-FM Mark III is housed in a durable extruded aluminum case with its solid state circuitry mounted on a tough fiberglass epoxy circuit board. To meet the most demanding applications and to provide stability of instrument reading, the 1 in. w.c. range is compensated for position sensitivity through the use of a unique patented dual sensor system. A standard 9 volt battery provides up to 100 hours of operation. It has dual push pads on the front panel control on-off, auto zero and pressure unit selection. No set-up or leveling. The large 0.42 LCD display is easy to read, minimizing data collection errors. Units include a “low battery” indicator. The pressure sensor used is a highly stable silicon piezoresistive device. Standard connections are dual sized for 1/8" or 3/16" I.D. vinyl or rubber tubing. Complete instructions are conveniently printed on rear of housing.
475-AV Air Velocity Kit : Includes the Series 475-FM Manometer, two A-303 static pressure tips two 9 ft. lengths 3/16 I.D. rubber tubing, no. 166-6- CF Pitot tube, A-397 step drill, A-532 air velocity slide chart and instruction bulletin H-11, all packed in a tough, molded plastic carrying case with die cut foam liner. To order, add AV suffix to any standard 475 model no.
A-402A Carrying Case : Tough gray nylon pouch protects any Series 475 Manometer. Double zippered for quick and easy access. With belt loop that snaps closed.
|Service||Air and compatible combustible gases|
|Wetted Materials||Consult factory|
|Accuracy||±0.5% F.S., 60 to 78oF (15.6 to 25.6oC); ±1.5% F.S. from 32
to 60°F and 78 to 104oF (0 to 15.6oC and 25.6 to 40oC).
|Pressure Hysteresis||±0.1% of full scale.|
|Temperature Limits||0 to 140oF (-17.8 to 60oC)|
|Compensated Temperature Limits||32 to 104oF (-0 to 40oC)|
|Storage Temperature Limits||-4 to 176oF (-20 to 80oC)|
|Display||0.42(10.6 mm) 4 digit LCD|
|Power Requirements||9 volt alkaline battery. Battery not connected|
|Weight||10.8 oz (306 g).|
|Connections||Two barbed connections for use with 1/8 (3.18 mm) or
3/16 (4.76 mm) I.D. tubing. Two compression fittings for use with 1/8
(3.18 mm) I.D. x 1/4(6.35 mm) O.D. tubing for 475-7-FM & 475-8-FM
|Agency Approvals:||FM, CE.|
|Model Number||English Range||Metric RAnge||Maximum Pressure|
|475-000-FM-||0-1.000 in w.c.||.2491 kPa||5 psig|
|475-00-FM||0-4.000 in w.c.||0.996 kPa||5 psig|
|475-0-FM||0-10.00 in w.c.||2.491 kPa||5 psig|
|475-1-FM||0-20.00 in w.c.||4.982 kPa||10 psig|
|475-2-FM||0-40.00 in w.c.||9.96 kPa||10 psig|
|475-3-FM||0-200.0 in w.c.||49.82 kPa||30 psig|
|475-4-FM||0-10.00 psi||.6895 bar||30 psig|
|475-5-FM||0-20.00 psi||1.379 bar||60 psig|
|475-6-FM||0-30.00 psi||2.069 bar||60 psig|
|475-7-FM||0-100.0 psi||6.895 bar||150 psig|
|475-8-FM||0-150.0 psi||10.34 bar||200 psig|