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OMS 420 Ex

O2 & COe in-situ monitoring system for use in hazardous area zone 2 The O2 and COe monitor is dedicated for continuous combustion optimisation at:
  • various industrial furnaces/ovens/boilers, with hazard of explosive atmosphere
  • petroleum refinery plants
  • petrochemical plants
  • gas separation, blast furnace, coke oven or ther syngas plants

  • Hazardous area designation of use: Zone 2 or Class 1, Div 2, Gr A/B/C/D
  • Special IP 65 pressurized cabinet and z-purge controller, complying to II 3G Ex pz II T3 Gc
  • Easy and fast, on site replaceable detector head with sensors (O2 & COe)
  • Integrated control unit with backlit display, operating key pad, dual galvanic isolated 4 … 20 mA output and digital output RS 485 (Modbus RTU)
  • Stainless steel SS316Ti flange 4″ ANSI-150Ibs with flow guidance probe tubes, from 250mm up to 2m length
  • Unique hot solid electrolyte sensor for combustible COe-measurement without need for sample dilution with air as required for catalytic bead sensors (Pellistors) (Option)
  • Unique blow-back system for dusty flue gases (Option)
  • Integrated auto-calibration for accurate measurements (Option)
  • Dust tight and water proof enclosure, with optional ATEX heater for very low ambient air temperatures or optional ATEX Vortec cooler for high ambient temperatures

O2
0 ... 25 % (zirconium dioxide)
COe
0 ... 1.000 ppm (hot solid electrolyte)
Temperature
up to 1.000 °C
Pressure
900 to 1.100 mbar
Flow Velocity
min. 1 m/sec to max. 30 m/sec

O2
0 ... 25 % (zirconium dioxide)
COe
0 ... 1.000 ppm (hot solid electrolyte)
Temperature
up to 1.000 °C
Pressure
900 to 1.100 mbar
Flow Velocity
min. 1 m/sec to max. 30 m/sec

Warm up time
Minimum 30 minutes
Ex classification
II 3G Ex pz II T3 Gc
Response time
< 10 seconds
Flange
flange 4" ANSI-150lbs, stainless steel 1.316Ti
Probe tube length
250 mm to 2.000 mm, Inconel steel
Interfaces
Dual, analog output 4 ... 20 mA, isolated, max. load 500R, RS 485 digital interface (Modbus RTU), DIN-rail RS 485/Profibus converter
Calibration
Manual or automatic (user free settable), 1 point (offset) or 2 points (offset and span)
Power supply
100 ... 240Vac / 47 ... 63 Hz / 100 W (300 W with cabinet heater)
Compressed air
6 ... 8 bar, free of dust, oil and water free (DP -20°C or less)
Ambient conditions
+5°C ... +45°C (+65°C with ATEX vortec cooler) and -45°C ... +45°C with cabinet heater
Dimensions
650x500x350 mm (HxWxD)
Protection
IP 65
Weight
approx. 25 kg