


Dwyer Instruments 478A-0 | Digital differential manometer | Range -4 to 4" w.c.
Positive, negative, or differential pressures can be measured with the Dwyer 478A differential pressure digital manometer. It provides an immediate selection option with up to nine English and metric units, one-button auto-zero, and ±1.5% FS accuracy. The 478A is made to last because to its durable aluminum casing and auto power-off feature, which extends battery life.

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- Specifications
- Features
- Downloads
Accuracy | +/-1.5% FS @ 72°F (22.2°C). Includes linearity and repeatability |
Approvals | CE |
Connection | Process: For use with 3/16" or 1/4" I.D. tubing |
Display | 4 digit LCD (.425"H x .234"W digits) |
Material | Wetted: Consult factory |
Maximum Operating Pressure | 5 psig (.74 bar) |
Maximum operating temperature | 0 to 140°F (-17.8 to 60°C) |
Power | 9 V alkaline battery, installed non-functional, user replaceable |
PRESSURE | Hysteresis: +/-0.1% of FS |
Range | -4 to 4" w.c. |
Temperature | Compensated Temperature Limits: 32 to 104°F (0 to 40°C) |
Thermal Effect | 0.05% FS/°F |
Weight | 10.8 oz (306 g) |
- Accuracy at full scale ±0.5%.
- Durable aluminum extrusion housing.
- Auto-zero function with one button.
- Automatic shut-off feature to prolong battery life.
- Select up to nine English/metric units instantly.
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