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Dwyer Instruments
Dwyer Series 475 Mark III Digital Manometer
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Dwyer 475 Mark III: IS digital manometer; 1 in w.c.–150 psid; ±0.5% FS. RFQ.
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RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Accuracy
±0.5% FS at 60–78 °F; ±1.5% FS outside
Display
4-digit LCD 0.42 in
Approvals
CE; FM Class I Div 2 Groups A–D T4
Type
Intrinsically safe handheld digital manometer (Series 475)
Ranges
1 in w.c. to 150 psid model chart
Hysteresis
±0.1% FS
Fits intrinsically safe handheld differential pressure checks where you need a Dwyer Series 475 Mark III. Digital manometer with model ranges from 1 in w.c. to 150 psid, accuracy ±0.5% FS at 60–78 °F (±1.5% FS outside), hysteresis ±0.1% FS, 4-digit LCD, 9 V alkaline battery, service on air and compatible combustible gases, operating 0 to 140 °F.
Key advantages
- Type — IS handheld digital manometer
- Ranges — 1 in w.c. to 150 psid
- Accuracy — ±0.5% FS (60–78 °F)
- Hysteresis — ±0.1% FS
- Service — Air / compatible combustible gases
Typical applications
- Field DP checks.
- HVAC / process manometry.
- IS area pressure surveys.
Selection guide
- Range model
- Gas compatibility
- IS approvals needed
Common mistakes
- Wrong range model.
- Incompatible gas media.
- Accuracy outside 60–78 °F window.
When to RFQ / what to tell us
- Range model.
- Quantity, ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 41034 |
| Brand | Dwyer Instruments |
| Model | Series 475 Mark III Digital Manometer |
| Product type | Digital Manometer |
| Type | Intrinsically safe handheld digital manometer (Series 475) |
| Ranges | 1 in w.c. to 150 psid model chart |
| Accuracy | ±0.5% FS at 60–78 °F; ±1.5% FS outside |
| Hysteresis | ±0.1% FS |
| Display | 4-digit LCD 0.42 in |
| Power | 9 V alkaline battery |
| Service | Air and compatible combustible gases |
| Temp limits | 0 to 140 °F operating |
Documents
FAQ
Q: Accuracy? A: ±0.5% FS at 60–78 °F.
Q: Ranges? A: 1 in w.c. to 150 psid by model.
Q: What should I send for a quote? A: Range model, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Accuracy | ±0.5% FS at 60–78 °F; ±1.5% FS outside |
| Display | 4-digit LCD 0.42 in |
| Approvals | CE; FM Class I Div 2 Groups A–D T4 |
| Type | Intrinsically safe handheld digital manometer (Series 475) |
| Ranges | 1 in w.c. to 150 psid model chart |
| Hysteresis | ±0.1% FS |
| Power | 9 V alkaline battery |
| Service | Air and compatible combustible gases |
| Temp Limits | 0 to 140 °F operating |
| Weight | 10.8 oz (306 g) |