Intra-Sewi KNX L-Pr and TH-L-Pr

Built-in Type Brightness and Presence Detectors

The Sensor Intra-Sewi KNX L-Pr for the KNX building bus system captures brightness and motion in rooms.

The Sensor Intra-Sewi KNX TH-L-Pr additionally measures the temperature and the air humidity and calculates the dew-point. Via the bus, the indoor sensor can receive external values of temperature and humidity and process them further with its own data to a total value (mixed value, e.g. room average). Integrated PI-controllers control ventilation (humidification/dehumidification according to humidity) and heating/cooling (according to temperature).

The Sensor Intra-Sewi KNX TH-L-Pr can output a warning to the bus as soon as the comfort field, as per DIN 1946, is left. Actuating variable comparators can compare and output variables that were received via communication objects. 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.


N° 70670 Intra-Sewi KNX L-Pr Presence Detector with Brightness Sensor, white
N° 70672 Intra-Sewi KNX L-Pr Presence Detector with Brightness Sensor, black
N° 70680 Intra-Sewi KNX TH-L-Pr Presence, Brightness and Ambient Climate Sensor, white
N° 70682 Intra-Sewi KNX TH-L-Pr Presence, Brightness and Ambient Climate Sensor, black

Intra-Sewi KNX L-Pr and TH-L-Pr

Common features in all models:

• Brightness measurement with brightness control
• Motion detection
• Threshold values can be adjusted per parameter or via communication objects
• 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
• Configuration is made using the KNX software ETS

Additional functions Intra-Sewi KNX TH-L-Pr:

•Measuring the temperature and air humidity (relative, absolute), each 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 heating (one or two-stage) and cooling (one or two-stage) according to temperature. Regulation according to separate setpoints or basic setpoint temperature
• PI controller for humidity according to humidity: Ventilate/Air (one-stage) or Ventilate (one or two-stage)
• 2 actuation variable comparators to output minimum, maximum or average values. 5 inputs each for values received via communication objects

Housing Plastic, glass
Colour • similar to signal white RAL 9003
• similar to jet black RAL 9005
Assembly built-in, in false ceiling or connector socket
Protection category IP 30
Dimensions Ø approx. 80 mm;
height above wall approx. 5 mm
height in wall (installation) approx. 31 mm (incl. clamps)
Total weight approx. 50 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
BCU type Integrated microcontroller
PEI type 0
Group addresses max. 254
Assignments max. 254
Communication objects Intra-Sewi KNX TH-L-Pr: 252
Intra-Sewi KNX L-Pr: 122
Brightness sensor: Measurement range 0 lux … 2,000 lux (higher values can be measured an displayed)
Motion sensor: Coverage angle approx. 94° × 82° (see also Coverage area of the motion detector)
Range approx. 5 m

Only Intra-Sewi KNX TH-L-Pr:

Temperature sensor: Measurement range -20°C … +60°C
Humidity sensor: Measurement range 0% rH … 100% rH
made in germany