Gas sensors used

2 or 3 units containing:

  • CO2 sensor Telaire 6613: Nondispersive Infrared (NDIR) infrared source/sensor - Datasheet.pdf, RS232.pdf
    • Range: 0-2000PPM, accuracy: pm ±30PPM, response time: <2min
    • Communication: RS232 / I2C
  • Temperature / humidity sensor HYT271: datasheet.pdf, I2C.pdf
    • Temp: Range: -40 °C to +125 °C, max error: ±0.05%
    • Hum: Range: 0-100%, max error: ±1.8%, response time <4s
    • Communication: I2C
  • O2 sensor PSR-11-39-MDSX: Operates by measuring the electricity generated by a small electro-galvanic fuel cell.
    • Range: 0-100%, signal output: 10-14mV, response 90%: 10sec, expected Life: 42months
    • Communication: high impedance analogue voltage, interface: MCP606
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