Environmental

Bosch BME688 environmental sensor on STEMMA QT/Qwiic breakout with 3–5 V input, onboard 3.3 V regulator and level shifting. I2C or SPI interface.

Sensirion SCD40 photoacoustic NDIR CO₂ sensor on STEMMA QT/Qwiic breakout with on-board 3.3 V regulation and I2C level shifting. Measures CO₂, temperature, and humidity.

Analog pressure sensor (0-150 PSI range) with 5 VDC excitation. Outputs a voltage proportional to pressure (approximately 0 to 4.5 V over the full range). Threaded connection (1/8" NPT male) allows it to be installed in a pressure line. Commonly used for measuring fuel, oil, or air pressure in automotive and industrial systems.

Bosch BME280 sensor breakout for temperature, humidity, and barometric pressure. Measures humidity (±3% accuracy), pressure (±1 hPa), and temperature (±1.0°C). Supports I2C and SPI communication. Onboard 3.3V regulator and level shifting allow 3-5V supply and logic compatibility, making it easy to use with Arduino (5V) or Raspberry Pi (3.3V).

Dual-channel NDIR CO₂ sensor module with integrated humidity and temperature sensing, internal RH/T compensation, and selectable I2C, Modbus-TTL UART, and PWM outputs.