Electrochemical oxygen sensor with I2C output and 0–25 %Vol range. Compatible with 3.3–5 V microcontrollers; high stability for ambient O2 monitoring.
Electrochemical oxygen sensor with I2C output and 0–25 %Vol range. Compatible with 3.3–5 V microcontrollers; high stability for ambient O2 monitoring.
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
MQ gas sensors, VOC/eCO2 indicators, NDIR true-CO2 modules and PM1/PM2.5/PM10 particulate sensors — over 100 listings across very different detection chemistries.
Fermion: ENS160+BME280 Environmental Sensor (Breakout) visual previewFermion: ENS160+BME280 Environmental Sensor (Breakout)
Grove - Air quality sensor visual previewGrove - Air quality sensor
Grove indoor-air-quality sensor for a broad mix of CO, alcohol, acetone, thinner and formaldehyde. Single analog index, not a calibrated ppm reading.
BME680 Breakout - Air Quality, Temperature, Pressure, Humidity Sensor visual previewBME680 Breakout - Air Quality, Temperature, Pressure, Humidity Sensor
MQ-2 Gas Sensor visual previewMQ-2 Gas Sensor
Combustible gas and smoke sensor: LPG, propane, methane, alcohol, hydrogen and smoke response. Analog output plus a digital threshold pin. Needs heater preheat.
MQ-3 Gas Sensor visual previewMQ-3 Gas Sensor
Alcohol-biased MOX sensor for ethanol vapour and breath-alcohol style prototypes. Analog output plus a digital threshold pin. Needs heater preheat.
MQ-135 Gas Sensor visual previewMQ-135 Gas Sensor
Broad indoor-pollutant MQ sensor biased to NH3, NOx, benzene, smoke and CO2-style response. Analog output plus a digital threshold pin. Needs heater preheat.
Particulate Matter Sensor - SPS30 visual previewParticulate Matter Sensor - SPS30
Sensirion SPS30 optical particulate sensor. Use for PM monitoring, not as a VOC/eCO2 or combustible-gas substitute.
Particle, VOC, Humidity, and Temperature Sensor - SEN54 visual previewParticle, VOC, Humidity, and Temperature Sensor - SEN54
Sensirion SEN54 combined module: particulate matter plus VOC, humidity and temperature. Useful upgrade path from PM-only designs, but firmware and airflow change.
SparkFun Air Quality Sensor - SGP40 (Qwiic) visual previewSparkFun Air Quality Sensor - SGP40 (Qwiic)
Sensirion SGP40 Qwiic VOC-index sensor. Good for IAQ trends over I2C, not a gas-specific ppm sensor and not true CO2.
SparkFun Indoor Air Quality Sensor - ENS160 (Qwiic) visual previewSparkFun Indoor Air Quality Sensor - ENS160 (Qwiic)
ENS160 Qwiic indoor-air-quality sensor with AQI, TVOC and eCO2-style outputs. Not a true CO2 sensor and not an MQ drop-in.
Fermion: ENS160 Air Quality Sensor - TVOC/eCO2/AQI (Breakout) visual previewFermion: ENS160 Air Quality Sensor - TVOC/eCO2/AQI (Breakout)
ENS160 breakout with TVOC, eCO2 and AQI outputs over I2C/SPI. Similar sensing class to ENS160 Qwiic boards, but connector and board format differ.
Fermion: BME688 AI Environmental Sensor (VOC, Temperature, Humidity, Pressure) visual previewFermion: BME688 AI Environmental Sensor (VOC, Temperature, Humidity, Pressure)
BME688 multi-environment sensor: VOC plus temperature, humidity and pressure. Does not replace particulate or direct CO2 measurement.
Biomedical Sensor Pad (10 pack) visual preview
BOSON: Heart Rate Monitor Sensor i20 visual preview
Capacitive Fingerprint Reader visual preview
Capacitive Fingerprint Reader (B) visual previewUART/I2C fingerprint modules, MAX30102 PPG breakouts, and analog ECG/EMG front-ends for access control and hobby biometric sensing.
Sensors · Biometric sensors · 24 parts
0.3M Pixel Serial JPEG Camera Module visual preview
100X Industrial Microscope Lens for Raspberry Pi HQ Camera visual preview
12.3MP Camera Module for NVIDIA Jetson Nano & Raspberry Pi CM3 visual preview
2.4G Wireless Video Transmission Module (640*480 Resolution) visual previewPi CSI modules, USB cameras, MCU-class OV2640/OV5640 boards, on-camera AI like HuskyLens and OpenMV, and thermal or ToF imagers — over 130 listings across very different pipelines.
Sensors · Cameras & vision · 139 parts
0.28 Inch LED Digital DC Voltmeter - Green visual preview
4-ch Current/Voltage/Power Monitor HAT visual preview
Adafruit INA219 FeatherWing visual preview
Adafruit INA219 High Side DC Current Sensor Breakout STEMMA QT visual previewINA-series I2C monitors, Hall-effect sensors like the ACS723 and Gravity 20A/50A boards, and non-invasive CT clamps for everything from 3.3V rail telemetry to mains current sensing.
Sensors · Current & voltage · 24 parts
VL53L1X Time of Flight (ToF) Sensor Breakout visual preview
Solid State TOF LiDAR - CE30-A visual preview
25m Long Distance ToF Laser Sensor (±3cm Accuracy, 100Hz, 100K LUX Resistant) visual preview
4-20HR-MaxSonar-WRMI MB7489 Waterproof Ultrasonic Distance Sensor (50~500cm, IP67) visual previewAbout 180 listings spanning VL53-series ToF breakouts, HC-SR04 and MaxSonar ultrasonics, 360° triangulation LiDARs, IR proximity sensors, 24GHz mmWave presence detection and laser break-beam sensors.
Sensors · Distance sensors · 178 parts