Lambda Transmitter LT3 KS1D

  • Combined Oand CO/Hmeasuring
  • Measuring directly inside flue gas
  • Applicable up to 1200 °C
  • Independent of infiltrated air (COe)
  • Ex design
Tecnical Data
Measuring range :O2: 0-21 % (configurable)
COe: 1ppm in CO range 0…10.000 ppm (configurable)
Housing:Sheet steel
Protection type following  DIN 40050IP66, without display
IP54, with embedded start-up assistant inside front door
Dimensions (HxBxT) mm300 x 300 x 120
ColorGrey, RAL 7035
WeightAppr. 6kg
Ambient temperature
-5 °C … + 60 °C
Ambient temperature
transport and storage:
-20 °C … + 70 °C
Power supply:120 VAC / -30%…230 VAC / +10%, 50…60Hz
Power consumption:30W (normal operation)
69W (heating)
Resolution O2:

0-21 % (configurable)

Resolution COe:1 ppm in CO range 0…1000 ppm
Preciseness of measuring:
(with combination probe KS1D)
O2:   ±5% of measurement value 
(max ± 0,3 Vol. % O2)
COe:  ±25% of measurement value
(not better than +/- 20 ppm after prior calibration for application conditions with a CO-reference measuring)
Setting time (60 % time):O2:   T 60 < 10 s
COe: T 60 < 2 s
Time for readiness
with KS1D (cold start-up)
Appr. 10min after „POWER ON“
(Initial start-up appr. 60min)
Analogue output, via analogue output module:Analogue output  1 (O2 measurement value)
– Range of setting:   0…25 % O2
– Factory setting 0…10 Vol.% O2 -> 4…20 mA
Analogue output 2 (CO-measurement value)
–  Range of setting: 0…1000 ppm
– Factory setting 0…1000 ppm -> 4…20 mA
Digital outputs
via digital output module:
Control element:Integrated LT3 User Interface with LCD-graphic display 45×27 mm (BxH)
External start-up assistant with LCD-graphic display 60×32 mm (BxH) (Option)
Interface:LAMTEC System Bus (LSB)

SIL 1 Confirmation:

  • DIN EN 61508

The Lambda transmitter LT3 in connection with the combination probe KS1D is developed for simultaneous measurement of O2 concentration and oxidizing gas elements (CO/H2), displayed as COequivalent in exhaust gases of combustion plants within hyperstoichiometric ranges (λ > 1).

The display and handling of the LT3 is managed via user interface inside the front door (belongs to standard delivery), with the following functions:

  • Display of O2 and COe measurement values
  • Password entry
  • Informationen about probe and fuel, for warnings and failures, for software versions, CRC and serial number
  • Calibration of measurement
  • Setup (maintenance, filter time, analogue output, probe exchange, display)
selection Criteria
Housings and typesDisplay and operationAccessory
Wall mounting housingOptional user interface inside front-doorProbe installation fitting (PIF)
 Start-up assistent in german / english or french languageGas extraction device (GED)
 LSB Remote software for PCOutside-isolation / Flange blankets