Mini-Sewi KNX T and TH

Indoor Sensors

The Sensors Mini-Sewi KNX T and Mini-Sewi KNX TH measures the ambient temperature. Mini-Sewi KNX TH additionally captures the air humidity and calculates the dew-point. Via the bus, the indoor sensors can receive external values of temperature or humidity and process them further with their own data to a total value (mixed value, e.g. room average).

All measurement values can be used for the control of limit-dependent switching outputs. States can be linked via AND logic gates and OR logic gates. In addition, an integrated actuating variable comparator can compare and output variables that were received via communication objects.

An integrated PI-controller controls a heating/cooling (according to temperature). Mini-Sewi KNX TH offers a second controller for ventilation (humidification/dehumidification according to humidity) and a warning can be output to the bus as soon as the comfort field, as per DIN 1946, is left.


N° 70400 Mini-Sewi KNX T temperature sensor
N° 70401 Mini-Sewi KNX TH sensor for temperature and humidity

Mini-Sewi KNX T and TH
  • Measuring the temperature, with mixed value calculation. The share of internal measurement value and external value can be set as a percentage
  • Threshold values can be adjusted per parameter or via communication objects
  • PI-controller for heating (one or two-stage) and cooling (one or twostage) according to temperature. Regulation according to separate setpoints or basic setpoint temperature 
  • 4 AND and 4 OR logic gates, each with 4 inputs. All switching events as well as 16 logic inputs (in the form of communications objects) can be used as inputs for the logic gates. The output of each gate can be configured optionally as 1-bit or 2 x 8-bit
  • 2 actuation variable comparators to output minimum, maximum or average values. 5 inputs each for values received via communication objects Configuration is made using the KNX software ETS

Mini-Sewi KNX TH additionally:

  • Measuring the air humidity (relative, absolute), with mixed value calculation. The share of internal measurement value and external value can be set as a percentage
  • Bus message, whether the values for temperature and air humidity are within the comfort field (DIN 1946)
  • Dew point calculation
  • PI controller for humidity according to humidity: Ventilate/Air (one-stage) or Ventilate (one or two-stage)
Housing Plastic
Colour White matt
Assembly Surface, wall or ceiling installation
Protection category IP 20
Dimensions Ø approx. 51 mm, height approx. 19 mm
Total weight approx. 20 g
Ambient temperature Operation -20…+60°C, storage -20…+70°C
Ambient humidity max. 95% RH, avoid condensation
Operating voltage KNX bus voltage
Bus current max. 10 mA
Data output KNX +/- bus plug-in terminal

Mini-Sewi T:

Communication objects 124
Temperature sensor measurement range -20°C … +60°C

Mini-Sewi TH:

Communication objects 179
Temperature sensor measurement range -20°C … +60°C
Humidity sensor measurement range 0% rH … 100% rH
made in germany