Sensors and Systems for combustion technology

Lambda Probe LS1 - oxygen probe

LS1 The proven sensor for measuring O2 in waste gases.
  • 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

Measuring system

Zirkonium-dioxide cell / current-probe

Measuring principle

Curent 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 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


Probe signal

0 ... 400/600 mA

TUV suitability approved

13. and 17.BlmSchV with Lambda Transmitter LT1

Zirkonium-dioxide probe (current probe) for a 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.
  • Optimised combustion


Area of use



up to 500 °C

Oil EL, gas

Types available for aggressive measuring gases as well as gas-tight types

Intelligent CO/O2 control in combination with probe KS1D

LS1 type for
probe installation fitting (PIF)

up to 1400 °C

Oil EL, heavy fuel oil, gas, coal and special fuels

Types available for aggressive measuring gases

Intelligent CO/O2 control in combination with probe KS1D