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

Basic-Equipment

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

Downloads

Flyer OMS 420 Ex

PDF, 1 MB

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