技術(shù)參數(shù)
Item
SenseAir® S8
Target gas
CO2
Operating Principle
Non-dispersive infrared (NDIR)
Measurement range
0.04 to 5% volume CO2
Accuracy
±0.02% volume CO2 ±200pmm+10% of reading (Note 1)
Response time
2 minutes by 90% for diffusion sampling method model
Operating temperature
5 to 50 ℃
Operating humidity
0 to 95% RH non condensed (Note2)
Storage temperature
-40o to + 70o C
Dimensions (mm)
32.7 x 19.7 x 9.9
Weight
< 8 grams
Power supply
5V ±5% unprotected against surges and reverse connection
Power consumption
300 mA peak, 30 mA average
Sensor life
15 years in normal commercial environments
Serial communication
UART, Modbus protocol. (Note 3)
Direction control pin for direct connection to RS485 transceiver integrated circuit.
PWM output, 1 kHz
0 to 100% duty cycle for 0 to 20000 ppm
3.3V push-pull CMOS output, unprotected
Alarm_OC
10000/8000 ppm, Normally conducting max 100mA. Transistor open at CO2 High, OR Power Low, OR at Sensor Failure
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