10Pcs/1pc SCD40 SCD41 GM-402B Gas Air Sensor Detect CO2 Carbon Dioxide Temperature Humidity Two-in-one Module I2C Communication

CD40/SCD41 has high precision and high cost performance. The module leads out the power supply and communication pins with a 2.54mm pitch pin interface. On-chip temperature and humidity compensation is achieved through the built-in temperature and humidity sensor to measure humidity and temperature. SCD40/SCD41 can realize intelligent adjustment of indoor ventilation system according to carbon dioxide concentration. Indoor air quality helps to maintain a healthy and efficient environment under low carbon dioxide concentration for a period of time.

Features

Benchmark accuracy, specified range, SCD40: 400-2000 ppm SD41: 400-5000 ppm

Supply voltage range: 2.4–5.5 V

High accuracy: ± (40 ppm+5%)

Digital I2C interface

Integrated temperature and humidity sensor

Low power operation to <0.4 mA average @5 V, 1 meas./5 minutes

Interface definition:

1.GND: Negative power input port

2.VDD: Positive power input port

3.SCL: I2C clock port

4.SDA: I2C data port

• Product Type: MEMS combustible gas sensor

• Detection gas: methane, propane, etc.

• Detection concentration: 1 ~ 10000ppm (C3H8)

• Loop voltage VC: ≤24V DC

• Heating voltage VH : 2.8V ± 0.1V AC or DC

• Load resistance RL: adjustable

• Heating resistor RH : 80Ω ± 20Ω (room temperature)

• Heating power consumption PH : ≤ 80mW

• Sensitive body resistance RS: 1KΩ～30KΩ (in 5000ppmCH4)

• Sensitivity S :R0(in air)/Rs(in 5000ppmCH4)≥2

• Concentration slope α: ≤0.9 (R5000ppm/R1000ppmCH4)

• Temperature, humidity: 20 °C ± 2 ° C; 55% ± 5% RH

• Standard test circuit: VH: 2.8V ± 0.1V; VC: 5.0V ± 0.1V

Circuit diagram: