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

3000MR or 3000MRS Series in Flame-Proof ATEX Enclosures

Using solid state technology, the SERIES AT23000MR AND AT23000MRS ATEX Approved Photohelic® Switch/Gages combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage. Gage reading is unaffected by switch operation and will indicate accurately even if power is interrupted. AT23000MR series employ versatile electromechanical relays with low amperage ratings-ideal for dry circuits. For applications requiring high cycle rates, choose AT23000MRS models with SPST (NO) solid state relays. Easy to adjust set point indicators are controlled by knobs located on the gage face (accessible opening case after de-energizing instrument). All models provide both low and high limit control. Compatible with air and other non-combustible, non-corrosive gases, they can be used in systems with pressures to 25 psig (1.725 bar). Optional construction is available for use to either 35 psig (2.42 bar) or 80 psig (5.51 bar).

Important notes for installation:
• Cables must be fitted through 1/2" NPT cable gland or ATEX conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to keep IP66 rating (IP65 with option OPV, overpressure relief valve).
• Open cover only after de-energizing instrument.
• Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous area.

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

California Residents:  Click Here for Proposition 65 WARNING.

Product Applications

  • Hazardous area pressure measurement and switching
  • Pneumatic conveying
  • Air conditioning systems
  • Clean rooms
  • Fume exhaust systems

Models & Ordering

Build Your Custom Part. Use our Product Configurator

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); Case: -76 to 140°F (-60 to 60°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 Approved Products from Comhas with ECN:
BVI 14ATEX0072.
Agency Approvals:
CE 1370 II2 GD Ex d IIC Gb T6; -60°C ≤ Ta ≤ +60°C Ex tb IIIC Db T 85°C.

Features

  • Gage reading unaffected by switch operation and will continue to read pressure even during power loss
  • Zero and range adjustments outside of gage means no disassembly in normal service
  • Solid-state design allows for switching in high cycle rate applications without degradation
  • Flame-proof ATEX enclosure with optional glass window and aluminum housing protects the device in hazardous areas while giving local visibility to process pressure and set point status

Videos

Model Chart

EXAMPLE AT23000-00  MR  00 X X X O 1 X T2 Series AT23000MR-00-XXX-AO1XT2 Photohelic® Gage with ATEX Enclosure, range .05-0-.2, electromechanical relays, standard 15 psig, aluminum housing, 1/8" npt female brass pressure port, standard plug without overpressure relief valve, stainless steel tag
SERIES AT23000-00                     Photohelic® Gage with ATEX Enclosure
RANGE 3000                  
3000
3001
3002
3003
3004
3005
3006
3008
3010
3015
3020
3025
3030
3040
3050
3060
3080
3100
3150
3000
3300
3301
3302
3304
3310
3320
3330
3000
3000
3201
3202
3203
3204
3205
3210
3215
3220
3230
3000
3000
3000
3000
3000
3000
3300
3300
3300
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3300
3300
3300
3300
3000
3000
3000
3000
3000
3300
3300
3300
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3000
3300
3300
3000
3000
3000
  00
0


















00N
0






00AV
0AV









6MM
10MM
25MM
50MM
80MM
100MM
20MM
30MM
40MM
15CM
20CM
25CM
50CM
80CM
100CM
150CM
200CM
250CM
300CM
4CM
10CM
20CM
30CM
60PA
125PA
250PA
500PA
750PA
120PA
250PA
500PA
1KPA
1.5KPA
2KPA
3KPA
4KPA
5KPA
8KPA
10KPA
15KPA
20KPA
25KPA
30KPA
1KPA
3KPA
20MBAR
100MBAR
500MBAR
                0-0.25" w.c.
0-0.5" w.c.
0-1" w.c.
0-2" w.c.
0-3" w.c.
0-4" w.c.
0-5" w.c.
0-6" w.c.
0-8" w.c.
0-10" w.c.
0-15" w.c.
0-20" w.c.
0-25" w.c.
0-30" w.c.
0-40" w.c.
0-50" w.c.
0-60" w.c.
0-80" w.c.
0-100" w.c.
0-150" w.c.
.05-0-.2" w.c.
.25-0-.25" w.c.
.5-0-.5" w.c.
1-0-1" w.c.
2-0-2" w.c.
5-0-5" w.c.
10-0-10" w.c.
15-0-15" w.c.
0-.25" w.c. & 300-2000 FPM AV
0-.5" w.c. & 500-2800 FPM AV
0-1 psid
0-2 psid
0-3 psid
0-4 psid
0-5 psid
0-10 psid
0-15 psid
0-20 psid
0-30 psid
0-6 mm w.c.
0-10 mm w.c.
0-25 mm w.c.
0-50 mm w.c.
0-80 mm w.c.
0-100 mm w.c.
10-0-10 mm w.c.
15-0-15 mm w.c.
20-0-20 mm w.c.
0-15 cm w.c.
0-20 cm w.c.
0-25 cm w.c.
0-50 cm w.c.
0-80 cm w.c.
0-100 cm w.c.
0-150 cm w.c.
0-200 cm w.c.
0-250 cm w.c.
0-300 cm w.c.
2-0-2 cm w.c.
5-0-5 cm w.c.
10-0-10 cm w.c.
15-0-15 cm w.c.
0-60 Pa
0-125 Pa
0-250 Pa
0-500 Pa
0-750 Pa
60-0-60 Pa
125-0-125 Pa
250-0-250 Pa
0-1 kPa
0-1.5 kPa
0-2 kPa
0-3 kPa
0-4 kPa
0-5 kPa
0-8 kPa
0-10 kPa
0-15 kPa
0-20 kPa
0-25 kPa
0-30 kPa
.5-0-.5 kPa
1.5-0-1.5 kPa
0-20 mbar
0-100 mbar
0-500 mbar
                   
GAGE TYPE   MR
MRS
                  Electromechanical Relays
Solid State Relays
PRESSURE RATING    

 

X
MP
HP 

              Standard 15 psig
Medium Pressure 35 psig
High Pressure 80 psig 
CONSTRUCTION                     Standard Construction
TEMPERATURE RATING           X
LT 
          Standard
Low Tempurature Option 
HOUSING MATERIAL             A         Aluminum
COVER               B
O
      Blind Top Cover
Glass Top Cover
PRESSURE CONNECTION                 1
    1/8" npt female Brass Pressure Port
1/8" npt female Stainless Steel Port 
OVERPRESSURE PLUG                   X
OPV
  Standard Plug without Overpressure Relief Valve
Overpressure Relieft Valve material same as port
TAG                     T2 Stainless Steel Tag

 

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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