Measures positive, negative, or differential pressures of air and natural gases in ranges from 1” WC to 150 PSID. ±0.5% full scale accuracy. Large LCD and two-button operation. FM approved intrinsically safe for Class I, Div 2, Groups A-D hazardous locations.
The Dwyer 475 digital manometer can be used for monitoring natural gas pressures or boilers or other combustion equipment, for field calibration of other instruments, monitoring or troubleshooting HVAC systems, and when used with a Dwyer pitot tube, can be used as an air velocity gauge.
- For air and compatible combustible gases
- Accuracy ±0.5% full scale; Pressure hysteresis ±0.1% full scale
- Good for temperatures 0° to 140° F
- 0.42” four-digit LCD
- Powered by user-replaceable 9-volt alkaline battery
- CE, FM approvals
Model Selection Guide
Use this table to find the right model for your application. Don't see the style or range you need? Call a Lesman sales specialist at 800-953-7626
Measuring Range | Max Pressure | Click for Price and Availability |
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0" to 1.000" WC | 5 PSIG | 475-000-FM |
0" to 4.000" WC | 5 PSIG | 475-00-FM |
1" to 10.00" WC | 5 PSIG | 475-0-FM |
0" to 20.00" WC | 10 PSIG | 475-1-FM |
0" to 40.00" WC | 10 PSIG | 475-2-FM |
0" to 200.0" WC | 30 PSIG | 475-3-FM |
0 to 10.00 PSI | 30 PSIG | 475-4-FM |
0 to 20.00 PSI | 60 PSIG | 475-5-FM |
0 to 30.00 PSI | 60 PSIG | 475-6-FM |
0 to 100.0 PSI | 150 PSIG | 475-7-FM |
0 to 150.0 PSI | 200 PSIG | 475-8-FM |
Accessories | Nylon Carrying Pouch | A-402A |
Protective Rubber Boot | A-47X-BOOT |
Measuring Range | 1" WC to 150 PSID |
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