The STCC4 sensor is tailored for environments with minimal, gradual changes, such as stationary indoor settings. It estimates CO₂ concentration by measuring thermal conductivity, which differs markedly between CO₂ (16,6 mW/(m·K)) and air (26,2 mW/(m·K)). Human respiration is the primary indoor source affecting conductivity. Thermal conductivity is influenced by temperature, humidity, and pressure. The STCC4 integrates a dedicated I²C interface for the SHT4x RH&T sensor, enabling automatic temperature and humidity compensation. Supports continuous and single-shot measurements, and includes sleep mode.
Features:
- Thermal conductivity-based CO₂ measurement
- 100 % factory-calibrated
- Accuracy ±(100 ppm + 10 % of reading) from 400 – 5000 ppm
- Typical response time: 20 s (τ63, continuous measurement mode)
- Digital I²C interface, calibrated output
- Two pin-selectable I²C addresses
- Recommended environmental conditions:
- Temperature: 10 to 40 °C
- Humidity: 20 to 80 %RH, non-condensing, max dew point 35 °C
- Pressure: 85 000 to 110 000 Pa (no compensation), 70 000 to 110 000 Pa (with pressure compensation)
- Electrical specifications:
- Supply voltage: 3,3 V typ, 2,7 to 5,5 V
- Average supply current: 950 µA (continuous), 100 µA (single shot, 10 s interval)
- Tape and reel package, reflow solderable
- 8-pin LGA package, 4x3x1,2 mm, MSL
Product benefits:
- STCC4 + SHT4x is the ideal sensor base for indoor air quality applications.
Applications:
- Indoor air quality monitors, smart thermostats, air conditioners
Development Tool:
- SEK-STCC4 - STCC4 breakout board with cable for SEK SensorBridge
Schedule a meeting to request a sample for your project
Need to test a component during development? Schedule a meeting with us to discuss your project and request a sample. Please provide a brief description of your project in the form below to help us prepare for our meeting.
Note: Samples are provided for development projects only, not for individual personal use.
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