S8 Miniature CO2 Sensor & Development Kit

SE-0031, CM-0116 (DEV Kit)

• Smallest NDIR Sensor on the Market
• Measures Up To 3.2% CO2

The S8 Miniature CO2 Sensor is the smallest non-dispersive infrared (NDIR) sensor on the market today. Thanks to a new optical path design, it can accurately measure carbon dioxide levels up to 2% with extended range measurement up to 3.2% by volume.

The S8 is designed to be used as a carbon dioxide safety switch. During normal operation, the sensor measures ambient CO2 concentration and compares the result with a user-programmed high-level set point. If high CO2 levels are detected, an open collector circuit in the sensor outputs a logic OR alarm.

To make the sensor useful for human safety applications, an internal diagnostic routine sets Fault Alarm in the event that any malfunction is detected. In addition, an alarm filter makes the S8 resistant to random disturbances while matching requested response time.

Specifications:

• CO2 Measurement: non-dispersive infrared (NDIR)
• Measurement Range: 400 – 20,000 ppm (2%)
• Extended Range: Up to 3.2% at reduced accuracy
• Accuracy: ± 0.02% ± 3% of reading
• Sensor Life Expectancy: > 15 years
• Maintenance Interval: no maintenance required
• Self-Diagnostics: complete function check of the sensor module 
• Warm-up Time: 2 minutes

Electrical / Mechanical:

• Output OC
• Communication: UART, Modbus protocol with RS485 capability
• Dimensions: 32.7 × 19.7 × 9.9 mm (LxWxH)  < 8 grams.
• Power Input: 5 VDC, ± 5%
• Current Consumption: 300mA peak, 30 mA average

Warranty:

• 90 days

Documentation (pdf)

Modbus Communication (pdf)