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.


Air and non-combustible, compatible gases.
Wetted Materials:
Consult factory.
±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 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 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:
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.
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




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

Product Reviews

Only registered users can write reviews. Please Sign in or create an account