SCD40 Gas Sensor Module Detects CO2 Carbon Dioxide Temperature and Humidity Sensor I2C Communication – KSH 2,500 at HIMASTORES Mombasa – best electronics in Kenya
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SCD40 Gas Sensor Module Detects CO2 Carbon Dioxide Temperature and Humidity Sensor I2C Communication

SKU: HMJ581 Category: Sensors
KSH 2,500.00
Out of Stock

Product Description

SCD40 CO2, Temperature, and Humidity Sensor Module

I2C Communication Gas Sensor for Air Quality Monitoring

The SCD40 is a compact photoacoustic CO2 sensor that combines a carbon dioxide detector with integrated temperature and humidity sensing on a single chip using Sensirion's PASens® and CMOSens® technology [citation:6][citation:8]. It's an ideal choice for indoor air quality monitoring, ventilation control, and scientific experiments [citation:9].

True CO2 Detection - Uses photoacoustic technology for real PPM measurement, not approximation [citation:9]
Compact 3in1 Solution - Measures CO2, temperature, and humidity in one tiny package [citation:6]
Supply voltage range: 2.4V to 5.5V with 15mA typical current [citation:2][citation:6]
I2C address fixed at 0x62 [citation:1][citation:4][citation:9]
The sensor should NOT be exposed to condensation or humidity above 95%RH, as this can permanently damage the device [citation:1]

Technical Specifications

ParameterValue
CO2 Range0 to 40,000 ppm (specified 400-2000 ppm) [citation:1][citation:2][citation:6]
CO2 Accuracy±(50 ppm + 5% m.v.) [citation:1][citation:2][citation:6]
Temperature Range-10°C to +60°C [citation:2][citation:6]
Temperature Accuracy±0.8°C (15-35°C) [citation:1][citation:2]
Humidity Range0 to 95%RH (non-condensing) [citation:1][citation:2][citation:6]
Humidity Accuracy±6RH (1535°C, 2065%RH) [citation:1][citation:2]
I2C Address0x62 [citation:1][citation:4][citation:7]
Dimensions10.1 x 10.1 x 6.5mm [citation:2][citation:6][citation:9]

= Key Features =

Photoacoustic Sensing Principle - Direct and accurate CO2 concentration measurement [citation:8][citation:10][citation:12]

Integrated Sensor Fusion Builtin SHT4x sensor compensates readings for ambient conditions [citation:1][citation:11]

I2C Digital Interface Simple 2wire communication with built-in CRC verification [citation:1][citation:9]

Multiple Measurement Modes Supports periodic, lowpower, and single-shot commands [citation:1]

Automatic SelfCalibration Routine that automatically adjusts to its environment over time [citation:10][citation:12]

Factory Calibrated - Ready to use with calibration certificate from Sensirion [citation:2][citation:6]

= Applications =

  1. Indoor and outdoor air quality monitoring
  2. Smart ventilation system regulation [citation:6]
  3. Greenhouse and agriculture environmental sensing
  4. Scientific experiments and laboratory use [citation:9]
  5. WELL Building Standard™ compliance checking [citation:6]
True CO2 Sensor Provides more reliable readings compared to VOCbased approximation [citation:9]
ThirdParty Support Works with Adafruit, SparkFun, Tasmota, M5Stack, and Arduino libraries [citation:8][citation:9][citation:10]

√ Multiple Qwiic/STEMMA QT ready breakout boards available [citation:4][citation:7][citation:9]

√ Supports ESPHome and ESP-IDF via community components [citation:1]

Connection and Usage Guidelines

The SCD40 communicates via I2C and can be powered directly from 3.3V or 5V [citation:4]. Breakout boards often include onboard voltage regulation and level shifting for easy integration [citation:4][citation:9]. It supports different measurement modes:

  • *Periodic Mode*: Continuous measurement at regular intervals [citation:1]
  • *LowPower Periodic Mode*: Lower sampling rate for batterypowered projects [citation:1]
  • *SingleShot Mode*: Ondemand measurement, though not supported by the SCD40 (this feature requires the SCD41 or SCD43) [citation:1]

Easy Integration - Works with many microcontroller platforms including Arduino and Raspberry Pi [citation:9]

ReadytoUse Factory calibrated and includes automatic selfcalibration [citation:2][citation:10]

√ Commonly available in breakout board form factor [citation:4][citation:7][citation:9]

√ Compatible with standard I2C libraries across various platforms

√ Onboard signal compensation enhances accuracy [citation:1]

Troubleshooting

Sensor not communicating:

  • Verify I2C address is 0x62 [citation:1][citation:4]
  • Check supply voltage (2.4-5.5V) [citation:2][citation:5]
  • Add appropriate pull-up resistors if not present on the module [citation:4]

Inaccurate readings:

  • Allow sensor to stabilize in fresh air for calibration period [citation:10]
  • Ensure environmental conditions are within specified range [citation:1]
  • Avoid exposing sensor to condensation or high humidity above 95%RH [citation:1]