OMS 420 Ex O2 & COe in-situ monitoring system for use in hazardous area zone 2

O2[Translate to Englisch:] [Translate to Englisch:] [Translate to Englisch:]

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
Technical Data
Measuring range
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
Dimensions and other data
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