Temperature sensor, humidity sensor, CO₂ sensor, surface-mounted

Information

Datasheet

Arcus SK30-THC-CO2-R KNX Sensor for Flush Mounting – White or Anthracite

The SK30-THC-CO2-R by Arcus-EDS is a versatile KNX sensor for flush-mounted wall installation. It measures and controls temperature, relative humidity, and CO₂ levels in indoor environments. With a compact design that fits standard 55 mm frames, this sensor is ideal for modern building automation and HVAC systems in KNX environments.

Available Variants:

• White – Article number: 30532351  |  EAN: 642125989411
• Antracite – Article number: 30532352  |  EAN: 642125989442

Applications:

• Measurement and control of indoor temperature, humidity, and CO₂
• Decentralized control of KNX valves and thermal actuators
• Automatic ventilation control based on air quality and humidity
• Evaluation of external switches and push buttons for control functions

Features and Functions:

• Integrated sensors for temperature, relative humidity, and CO₂
• Calculated values: absolute humidity, dew point, and enthalpy
• Control functions for heating and cooling (can be combined)
• Setpoint temperatures for Comfort, Standby, Economy, and Protection via KNX
• Manual setpoint adjustment via integrated rotary controller
• Storage of minimum and maximum temperatures
• Heat and frost alarms with KNX notifications
• Configurable limits for temperature, humidity, and CO₂
• Fan control via humidity/CO₂ thresholds and external inputs
• Dew point detection with regulation to prevent condensation
• Controller output: 0–100% or PWM (programmable) for thermal actuators
• Valve rinsing function
• Four logic blocks for linking internal and external signals
• Two floating binary inputs/outputs
• Status indication via LED display

Technical Specifications:

• Measured values: Temperature, relative humidity, CO₂ concentration
• Calculated values: Absolute humidity, dew point, enthalpy
• Temperature range: -10 to +50 °C
• Temperature resolution: 0.02 °C
• Temperature accuracy: ±0.4 °C (5–60 °C), otherwise ±0.8 °C
• Humidity range: 0–95% RH, resolution 0.02%, accuracy ±3% (20–80%)
• CO₂ range: 400–5000 ppm
• CO₂ accuracy: < ±(50 ppm + 2% of the measured value)
• Rotary controller: Setpoint adjustment ±5 °C
• Binary I/Os: 2 (floating)
• Operating voltage: KNX bus 21–32 VDC
• Power consumption: approx. 240 mW at 24 VDC
• Operating temperature: -10 to +50 °C
• Storage temperature: -25 to +60 °C
• Ambient humidity: 0–95% RH, non-condensing
• Bus coupler: Integrated
• ETS compatibility: From version 4 (HLK305)
• Connection terminals: KNX 2-pole clamps (red/black)
• Protection class: IP20
• Housing material: Plastic
• Dimensions: Fits standard 55 mm frame

Important Note:

This sensor is designed for flush mounting in standard 55 mm wall frames. All measuring elements are integrated within the housing. No external power supply is required for KNX operation.