Dwyer Handheld Digital Manometer
The Dwyer 475-FM Series Mark III handheld digital manometer is ideal for field-calibrating, monitoring, or troubleshooting HVAC systems, clean rooms, and a wide range of other low-pressure applications. This handy instrument measures positive, negative, or differential pressures of air and natural gases. The 475-FM Series is approved and intrinsically safe for hazardous locations, Class 1, Division 1, Groups A, B, C, D, and T4.
- Measures positive, negative or differential pressure
- Handheld and battery powered
- Intrinsically safe for hazardous locations
Service:Air and some combustible gases
Accuracy:±0.5% FS, 60º to 78ºF (15.6º to 25.6ºC); ±1.5% FS from 32º to 60ºF (0º to 15.6ºC) and 78º to 104ºF (25.6º to 40ºC)
Temp limits:32º to 104ºF (0º to 40ºC)
Display:0.5" liquid crystal, 3-1/2 digits
Pressure range/limit
475-000-FM:0-1.000 "W.C. (0-0.249 kPa)/10 "W.C. (2.5 kPa) max
475-00-FM:0-4.00 "W.C. (0-0.995 kPa)/5 psig (35 kPa) max
475-0-FM:0-10.00 "W.C. (0-2.49 kPa)/5 psig (35 kPa) max
475-1-FM:0-19.99 "W.C. (0-4.97 kPa)/20 psig (138 kPa) max
Power requirements:9V alkaline battery included
Connections:2 barbed connections for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing
Agency approvals:FM, CE
Weight:10.8 oz (0.31 kg)
Air velocity kit Option -AV:Includes the 475-FM manometer, (2) static pressure tips, (2) 9' lengths of 3/16" ID rubber tubing, (1) 166-6-CF pitot tube, (1) A-397 step drill bit, air velocity slide chart, instructions, and a molded plastic carrying case.
