Sensors and Systems for combustion technology

LT3-F for the failsafe Lamtec CO/O2 regulation (SIL2)

LT3-F for the failsafe Lamtec CO/O2 regulation (SIL2)
  • Display of O2 and COe measured values
  • Calibration of measurements
  • Up to 1200 °C flue gas temperatures
  • COe measurement not influenced by ingress air


Mounting house of sheet steel

Protection class:

IP54 with display

Dimensions (HxWxD):

300 x 300 x 120 mm


approx. 6 kg

Ambient temperature operation:

-20 °C ... +60 °C

Ambient temperature transport and storage:

-20 °C ... +70 °C

Power supply:

120 VAC ... 230 VAC, 50 ... 60 Hz

Power consumption:

Typically 30 W

Maximum 69 W

Range of measuring:

O2: 0 ... 21 Vol. % (configurable)
COe: 0 ... 10.000 ppm (configurable)


O2: 0,1 Vol. %
COe: 1 ppm

Analogue, digital Inputs/Outputs:

see download area (technical data LT3-F)

Measuring probe:

see selection criteria



EC type-examination certificate:

  • DIN EN 16340:2014-10
  • DIN EN 13611:2011-12
  • DIN EN 60730-1:2012-10

SIL 2 Confirmation:

  • DIN EN 61508 part 1-7
  • DIN EN 16340

EC-declaration of conformity:

  • 2009/142/EC (Gas Appliance Directive)
  • 2014/35/EU (Low Voltage Directive)
  • 2014/30/EU (EMC Directive)

SIL2 capable measuring system LT3-F (electronics) and KS1D (sensor) as a system component of the CO/O2 regulation. Usable only in connection with BT300/ETAMATIC/FMS/VMS. The Lambda Transmitter LT3-F is an electronic evaluation device, that was developed for the continuous measurement of O2 concentration and the oxidizing flue gas particles (CO/H2) in the super-stichiometric range in connection with the combination probe KS1D.  

Permissible fuels:

  • Residue free gaseous hydrocarbons (SIL 2 capable)
  • Domestic fuel (SIL 2 capable)
  • Lignite/coal (not SIL 2 capable)
  • Biomass (wood) (not SIL 2 capable)

Direct measurement in combustible gases are not possible.

  IP54 with display

Housing and type

Display and operation

Wall mounting housing

LSB remote software for PC, incl. USB/CAN module and connecting cable, from Windows XP

Options via additional modules:

Analogue outputs

Digital outputs

Digital inputs

Efficiency calculation


KS1D combination probe
(sensor only, without housing)

KS1D combination probe
with housing, MEV and SEA

KS1D-HT combination probe
with flue gas bypass tube