LS1 - Oxygen Probe

  • Calibration with ambient air
  • Linear measurement signal
  • For applications up to 1400 °C
  • Fast reaction and response
  • Increasing measurement precision in the range of 0 ... 21 % O2


Zirconium-dioxide probe (current probe) for continuous measuring of oxygen concentration, in a range Lambda >1 without special gas conditioning, in combustion gases, industry exhaust gases, and in oven atmospheres.

Lambda-probe LS1, combined with Lambda Transmitter LT1, forms a system for direct and continuous measuring of O2 concentration.


  • Industry and power plants of all kinds Approved by German Technical Inspectorate (TÜV)
  • Federal Immission Control Directives (BlmSchV) 13. and 17.
  • Optimized combustion

Selection criteria:

TemperatureArea of useSpecials

Up to 500 °C  

Oil EL, GasTypes available for aggressive measuring
gases as well as gas-tight types
LS1 type for probe installation fitting (PIF)

Up to 140 °C

Oil EL, heavy fuel oil,
Special fuels
Types available for aggressive measuring gases

Intelligent CO/O2 control in combination with probe KS1D

Technical data:

Measuring system Zirconium-dioxide cell / current-probe
Measuring principle Current probe (Current-mode)
Probe current = linear ƒ(O2-content)
Probe current for 21 Vol.% O2 300 to 600 mA
Operating temperature of measuring cell (sensor) 750 to 850 °C
Heating-up time

60 min. until stand-by at 21 % O2
120 min. until thermal balance

Setting time after the measurement-value jump t90 < 20 sec with standard measuring-gas-extractor, 450 mm long
Range of measuring 0-21 Vol. % O2 calibration with air
Preciseness of measuring ± 0,2 Vol. % O2 after calibration with
LT1 Lamda Transmitter
Protection type IP42
Probe signal 0 ... 400/600 mA
TUV suitability approved 13. and 17.BlmSchV with Lambda Transmitter LT1