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Dwyer Instruments
Dwyer A3000 Photohelic Pressure Switch/Gage
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المعاملات الرئيسية
Measuring range
Full-scale ranges from 0–0.25 in w.c. up to 30 psi
Accuracy
±2% FS at 70 °F (21.1 °C); ±3% on -0 and ±4% on -00 models
Process connection
1/8 in female NPT
Approvals
CE; CSA; UL
Service
Air and non-combustible compatible gases
Pressure Limits
−20 in Hg to 25 psig standard; MP 35 psig; HP 80 psig
| المعامل | القيمة |
|---|---|
| Measuring range | Full-scale ranges from 0–0.25 in w.c. up to 30 psi |
| Accuracy | ±2% FS at 70 °F (21.1 °C); ±3% on -0 and ±4% on -00 models |
| Process connection | 1/8 in female NPT |
| Approvals | CE; CSA; UL |
| Service | Air and non-combustible compatible gases |
| Pressure Limits | −20 in Hg to 25 psig standard; MP 35 psig; HP 80 psig |
| Temperature Limits | 20 to 120 °F (−6.67 to 48.9 °C); low-temperature option available |
| Size | 4 in dial face; 5 in OD × 8-1/4 in deep |
| Weight | 4 lb (1.81 kg) |
| Switch Type | Each setpoint has 2 Form C relays (DPDT) |
| Repeatability | ±1% of FS |
| Electrical Rating | 10 A @ 28 VDC; 10 A @ 120/240 VAC |
| Power Requirements | 120 VAC 50/60 Hz standard; 240 VAC and 24 VAC optional |
| Setpoint | Front-knob adjustable hi/lo; individual deadband <1% FS (one pointer width) |
| Special Features | 3-in-1 Magnehelic gage + phototransistor hi/lo switch; continuous gage reading independent of switch/power |