Series AT23000MR/3000MRS ATEX/IECEx Approved Photohelic® Switch/Gage

3000MR or 3000MRS Series in Flame-Proof Enclosures

This Series is no longer available, please see Series AT-3000MR/MRS for the suggested replacement.

Please see Series 3000MR/MRS for non-ATEX/IECEx approved.

California Residents:  Click Here for Proposition 65 WARNING.

Specifications

Service:
Air and non-combustible, compatible gases.
Wetted Materials:
Consult factory.
Accuracy:
±2% of FS at 70°F (21.1°C). ±3% on -0, -60 Pa and ±4% on -00 models.
Pressure Limits:
-20 in Hg to 25 psig (-0.677 bar to 1.72 bar). MP option: 35 psig (2.41 bar), HP option: 80 psig (5.52 bar).
Temperature Limits:
20 to 120°F. (-6.67 to 48.9°C). Option LT low temperature to -20°F (28.8°C); (Note: Product temperature limits differ from case).
Power Requirements:
24 VDC, regulated ±10%.
Electrical Wiring:
Screw terminals.
Mounting Orientation:
Diaphragm in vertical position.
Dial Size:
4" (101.6 mm).
Set Point Adjustment:
Adjustable knobs on face behind enclosure cover. Follow instructions and safety warnings to open cover.

SWITCH SPECIFICATIONS (3000MR)
Switch Type:
Each setpoint has 1 Form C relay (SPDT).
Relay Contacts:
(resistive load) 1 Form C rated 1.0 A @ 30 VDC, 0.3 A @ 110 VDC or 0.5 A @ 125 VAC. Gold over clad silver - suitable for dry circuits.
SWITCH SPECIFICATIONS
Switch Type:
Each setpoint has a solid state relay.
Switching Voltage:
20 to 280 VAC (47 to 63 Hz).
Switching Current:
1.0 amp (AC) max., 0.01 mA (AC) min., (2) SPST NO.
Enclosure Rating:
IP66. IP65 with option OPV, overpressure relief valve.
Housing Material:
Aluminum.
Finishing:
Texture epoxy coat RAL7038.
Pressure Connections:
1/8" NPT female brass (SS optional). In presence of acetylene it is necessary to use SS.
Electrical Connections:
Two 1/2" FNPT. Cable gland not included.
Weight:
12.5 lb (5.7 kg).
ATEX Certificate:
BVI 14ATEX0072.
Agency Approvals:
ATEX Compliant CE 1370 Ex II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C=Tamb=+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db

Approvals

Drawings

Questions

Question
What restrictions, if any, are imposed for the Magnehelic® and Photohelic® gages in vacuum service?
Answer
In applications involving higher vacuums than 20" Hg, leakage due to gage housing porosity becomes the limiting factor.

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