Dwyer 475-00-FM Manometer 4 inch WC Intrinsically Safe FM Approved is designed to measure positive, negative, and differential pressure of air and natural gases from 0 to 4.000 in w.c. The Dwyer 475-00-FM can also measure air velocity when used with a pitot tube. The Dwyer 475-00-FM features tough aluminum housing, an easy-to-read display, automatic zeroing, and is intrinsically safe to use in hazardous locations.
- Dwyer 475-00-FM Manometer 4 inch WC Intrinsically Safe
- Measures positive, negative, and differential pressure
- Measures differential pressure of air and natural gases from 0 to 4.000 in w.c.
- Works as an air velocity gauge when used with a pitot tube (not included)
- Tough aluminum housing to protect the instrument in harsh work environments
- English and metric units
- Metal tips are field replaceable
- Automatic 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 475-00-FM Manometer 4 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: 475-00-FM | ||
English Range | Metric Range | Maximum Pressure |
0 to 4.000 in w.c. | 0.996 kPa | 5 psig |
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Applications: | Dwyer 475-00-FM Manometer 4 inch WC Intrinsically Safe |
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 Gas Pressure Testing (Used to test for both high and low pressure downstream of a pressure regulator) Filter pressure testing (High DP across filter indicates filter is dirty and needs to be changed) Duct Traverses (Will not measure airflow but can read velocity pressures off a pitot tube) Gas input to furnaces Gas input to boilers Exhaust gas testing |
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