SK20-TTHC-CO2-2B - KNX Temperature, Humidity and CO2 Sensor with PT1000 Input, 2 Binary Inputs
SK20-TTHC-CO2-2B - KNX Temperature, Humidity and CO2 Sensor with PT1000 Input, 2 Binary Inputs

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ARCUS EDS

SK20-TTHC-CO2-2B - KNX Temperature, Humidity and CO2 Sensor with PT1000 Input, 2 Binary Inputs

SKU: 30542261
(0)
✗ UL Listed
This product has not been certified by an NRTL (UL, ETL, CSA or equivalent). Installation in USA projects may require a Field Evaluation by a recognized laboratory. Consult your local AHJ before specifying.
~ Low Voltage · SELV
This device operates on a Safety Extra Low Voltage circuit — such as the KNX 29V bus or a DALI 16V bus (NEC Class 2). When powered by an NRTL-listed power supply, many AHJs accept non-listed SELV devices. Verify with your local AHJ before specifying.
$380.02 USD
-17% $456.02 USD $380.02 USD
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The SK20-TTHC-CO2-2B is a KNX room sensor that measures temperature, humidity and CO2 and includes an integrated room temperature controller (RTR). It is a practical choice for demand-controlled ventilation in offices, meeting rooms and classrooms. Absolute humidity, dew point and enthalpy are calculated on board. An extra input for an external PT1000 probe adds a second temperature measurement from -50 to +400 °C (-58 to 752 °F).

The complete white plastic unit measures 71 x 71 x 25 mm (2.8 x 2.8 x 0.98 in) and flush-mounts on a standard in-wall box. Two binary inputs accept local contacts, and the sensor runs on KNX bus power with no auxiliary supply.

Key Features

  • Temperature -10 to +50 °C (14 to 122 °F), resolution 0.02 °C (0.04 °F), accuracy ±0.4 °C (±0.72 °F) (5 to 60 °C (41 to 140 °F)), else ±0.8 °C (±1.4 °F)
  • Relative humidity 0 to 95 %, accuracy ±3 % (20 to 80 %); calculates absolute humidity, dew point and enthalpy
  • CO2 400 to 5000 ppm, accuracy ±(50 ppm + 5 % of reading)
  • External PT1000 input for a second temperature, -50 to +400 °C (-58 to 752 °F) (probe not included)
  • 2 binary inputs
  • White plastic housing 71 x 71 x 25 mm (2.8 x 2.8 x 0.98 in), flush mount on standard in-wall box, IP20
  • Integrated bus coupler and RTR; bus powered, no auxiliary supply; ETS application HLK305

Technical Specifications

Article no. 30542261
KNX bus voltage KNX 21-32 VDC
Power consumption approx. 240 mW at 24 VDC (bus powered)
Auxiliary supply Not required (bus powered)
Measuring Temperature -10..+50 °C (14 to 122 °F), res. 0.02 °C (0.04 °F), ±0.4 °C (±0.72 °F) (5..60 °C (41 to 140 °F)) else ±0.8 °C (±1.4 °F); humidity 0..95 % rH, res. 0.02 %, ±3 % rH (20..80 %) else ±5 %; CO2 400..5000 ppm, accuracy ±(50 ppm + 5 % of reading); calculates abs. humidity, dew point, enthalpy; 2nd temperature: external PT1000 input -50..+400 °C (-58 to 752 °F) (accuracy depends on probe; probe not included)
Inputs / outputs & connections 2 binary inputs; external PT1000 input
Protection rating IP20
Dimensions 71 x 71 x 25 mm (2.8 x 2.8 x 0.98 in)
Mounting Flush mount on standard in-wall box, indoor (complete white plastic unit)
Operating temperature -10 to +50 °C (14 to 122 °F) (storage -25 to +60 °C (-13 to 140 °F)); 0..95 % rH non-condensing

Application note: The PT1000 probe for the second temperature input is not included and is ordered separately.

Downloads

(CE certified; not UL/NRTL listed — verify local code requirements before specifying in US installations)

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