Detector (ZFKE)

Converter (ZKME)

Detector with flow guide tube

Zirconia Oxygen Analyzer for Hazardous Location (ZKME, ZFKE ZFKE)

Fast response + no sampling involved — ideal for combustion management in boilers or furnaces

Use of flow guide tube — low maintenance

Flameproof design — ideal for oxygen analysis in hazardous areas, for example, petrochemical plants

  • Easily replaceable zirconia element
  • Fast response: 4 s to 7 s
  • Operation available without opening the cover
  • TIIS and NEPSI flameproof certified

Easily replaceable zirconia element

General specifications

Item Specifications
Target O2 in incombustible gas
Principle Direct insertion zirconia sensor
Range 0 to 2…50 vol% (user configurable two ranges)
(in 1 vol% steps)
Repeatability ≤ ±0.5% FS
Linearity ≤ ±2% FS
Response time 4–7 s for 90% response (from calibration gas inlet)
Warm-up time Approx. 30 min
(20 min when using ejector)
Analog output 4–20 mA DC (allowable load resistance ≤ 500Ω) or
0–1 V DC (output resistance ≥ 100Ω)
Power supply Rated voltage
100–120 V AC (operating voltage: 90–132 V AC)
200–240 V AC (operating voltage: 190–264 V AC)
Rated frequency 50/60 Hz
Power consumption Max. 240 VA
Normal 70 VA

Detector ZFKE

Item Specifications
Gas temperature Flow guide tube type: -10°C to +600°C
Gas pressure -3 kPa to +3 kPa
Operating temperature -10°C to +60°C
Enclosure Dustproof and rainproof, IEC IP66 equivalent
Weight Approx. 3 kg (excluding the flow guide tube)
Ejector air inlet flow rate 5 L/min to 10 L/min
Ex-proof standards TIIS Ex d IIB T4
NEPSI Ex d IIC T4 Gb
Flow guide tube With or without blow-down nozzle
Flange: JIS 5K 65A FF or as specified
Insertion length: 0.3, 0.5, 0.75, or 1 m

Converter ZKME

Item Specifications
Contact output 6 points, SPST, 250 V AC/3 A or 30 V DC/3 A (under maintenance, device error, alarm, zero calibration, span calibration, under blow-down)
Contact input 3 points, ON: 0 V, OFF: 5 V, ≤ 10 mA (remote hold, calculation reset, heater OFF, blow down, inhibition of calibration, calibration start, range change)
Communication RS232C (MODBUS)
RS485 (MODBUS) (option)
Combustion efficiency display (option)
Operating temperature -20°C to +55°C
Enclosure Dustproof and rainproof, IEC IP65 equivalent
Weight Approx. 22 kg (excluding cable and detector)
Ex-proof standards TIIS Ex d IIB T6
NEPSI Ex d IIC T6 Gb

Zirconia Oxygen Analyzer for Hazardous Location (ZKME, ZFKE ZFKE)