Dwyer AT3A3000 ATEX Certified Photohelic® Differential Pressure Gauge/Switch
ATEX certified Photohelic differential pressure gauge/switch, 2 sets of DPDT relays, standard pressure rating 25 psig.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The AT3A3000 is an ATEX certified Photohelic differential pressure gauge/switch featuring an aluminium flameproof enclosure with a glass viewing window for observing the setpoint pointers and process pressure. It incorporates 2 sets of phototransistor-driven DPDT relays, with a standard pressure rating of 25 psig and optional 35 or 80 psig.
| Parameter Name | Technical Specifications |
|---|---|
| Main specifications | |
| Housing | Aluminium flameproof enclosure with glass window |
| Relay | 2 sets of DPDT, phototransistor-driven, adjustable high/low limits |
| Pressure Resistance | Standard 25 psig (1.7 bar), optional 35 psig (2.4 bar) or 80 psig (5.5 bar) |
| Certification | ATEX CE 0477 Ex II 2G Ex db IIC T5/T6 Gb; II 2D Ex tb IIIC T75°C Db |
| Process connection | 1/8" NPT female |
| Installation requirements | Cable must be routed through a 1/2" NPT cable gland or ATEX conduit entry; tighten cover and gland after wiring to maintain IP66; open cover only when de-energised |
| Model selection | |
| Selection table | Published on the official website as a screenshot of the selection table; for complete model numbers and ranges, see the official manual "AT3A3000.i.pdf" in the documentation package. |
- ATEX flameproof enclosure (aluminium housing + glass window)
- 2 sets of phototransistor-driven DPDT relays, high/low limit control
- Setpoints can be interlocked to create a variable deadband, suitable for fan and damper control
- Standard 25 psig, optional 35 or 80 psig
- Three-in-one design reduces the number of field instruments
Hazardous area ventilation differential pressure control
Starts/stops fans based on differential pressure to maintain slight positive pressure in hazardous areas.
Differential pressure monitoring for explosion-proof cabinets and analyser shelters
Monitors positive pressure in the cabin to ensure safe operation of electrical equipment.
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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