Dwyer 476A Pressure Meter, 478A Differential Pressure Meter
Handheld digital pressure meter; 476A measures single pressure, 478A measures differential pressure, accuracy ±1.5% FS, extruded aluminium housing.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The 476A is a single-pressure type and the 478A is a differential-pressure type handheld digital manometer. The 476A has a range of -20 to 20" w.c. and an accuracy of ±1.5% FS. Both feature an extruded aluminium housing, 4-digit LCD display and 9V alkaline battery power, making them suitable for on-site rapid differential pressure comparison and equipment maintenance checks.
| Parameter Name | Technical Specifications |
|---|---|
| Main specifications | |
| Medium | Air and compatible gases |
| Wetted materials | Consult factory |
| Accuracy | ±1.5% FS @ 72°F (22.2°C). Includes linearity and repeatability |
| Pressure hysteresis | ±0.1% of FS. |
| Pressure limits | 5 psig (.34 bar). |
| Temperature limit | 0~140°F (-17.8~60°C). |
| Thermal effect | 0.05% F.S./°F. |
| Display | 4-digit LCD (digits 0.425" high x 0.234" wide). |
| Power Supply | 9 V alkaline battery, user replaceable |
| Pressure connection | Barbed connection for 3/16" or 1/4" I.D. tubing |
| Weight | 10.8 oz (306 g). |
| Certification | CE. |
| Model selection | |
| 476A-0 | Digital manometer, range -20 to 20" w.c. |
| 478A-0 | Digital differential manometer, range -4 to 4" w.c. |
| 478A-1 | Digital differential manometer, range -60 to 60" w.c. |
- 476A single-pressure type range -20 to 20" w.c.; 478A differential-pressure type measures positive/negative/differential pressure
- Accuracy ±1.5% FS (22.2°C), including linearity and repeatability
- Extruded aluminium housing for excellent durability
- 4-digit LCD, 9V alkaline battery powered
On-site rapid comparison of micro differential pressure
For temporary measurement and acceptance testing of differential pressure in air conditioning and cleanrooms.
Equipment maintenance pressure checks
Verify differential pressure across fans and filters before and after during servicing.
Need selection advice or bulk quotation?
Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
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