Module with 2 QTR type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4202

The module is based on the Acconeer XM125 radar, which uses 60 GHz radar technology, offering distance measurement up to 20 meters and recognition of objects and their movement speed. The sensor is characterized by low power consumption, making it ideal for battery-powered devices, and also allows for various detection modes, such as level measurement or human presence. Supported by the Arduino library and the Acconeer Exploration Tool, the module provides support for monitoring, debugging and configuration, offering a wide range of applications from smart homes to advanced robotics and security systems. SParkFun SEN-24540

Infrared sensor module for presence and motion detection based on the STHS34PF80, featuring an I2C interface and STEMMA QT / Qwiic connectors, capable of detecting objects up to 4 m without a lens. Adafruit 6426

The INA3221 module, which allows simultaneous measurement of voltage and current for three power supplies via I2C with ±1% precision. With a 13-bit ADC and built-in 0.05Ω shunt resistors, it allows accurate monitoring of currents up to ±3.2A and voltages up to +26VDC. Adafruit 6062

ST Microelectronics’ STTS22H digital temperature sensor module, featuring a Qwiic connector, offers accuracy from -40°C to 125°C without the need for additional calibration. The sensor consumes only 1.75 µA in single measurement mode, making it ideal for low-power applications, and additional features such as a configurable interrupt pin and the ability to select two I2C addresses increase its versatility. SparkFun SEN-21262

Module with CO2, temperature and humidity sensor SCD-41. Equipped with a Qwiic/STEMMA QT connector, it communicates via the I2C interface. Pimoroni PIM587

Formaldehyde sensor (HCHO) dedicated to measuring ambient air quality. It is used to detect whether the surrounding environment exceeds a set concentration threshold. It is powered by a voltage of 5 V to 24 V and has an output in the form of a two-state digital signal. DFRobot SEN0595

Optical rain sensor module for detecting the state of rainfall on glass. It is configured via the UART interface and returns rain intensity information via this bus. DFRobot SEN0545

Gravity: High Accuracy is a multifunctional environmental sensor with Gravity I2C and UART output. Perfect for weather station projects. DFRobot SEN0501

Ultrasonic distance sensor with a range of 30 to 500 cm. Powered from 5 to 12 V, it communicates via RS485 interface. DFRobot SEN0519

Module with a pulse sensor and the level of SpO2 (oxygen saturation level). It is based on the MAX30102 chip and communicates via the I2C or UART interface (Gravity connector). DFRobot SEN0518

LHT65N sensor for measuring air temperature and humidity with LoRaWAN 868MHz communication, supporting an external temperature probe, designed for long-term environmental monitoring. Seeed Studio 113990756

Finder 7T.81.0.000.2403 is a NC (Normally Closed) thermostat for precise temperature monitoring in industrial systems. It operates in the range of 0°C to +60°C with a hysteresis of 7±4 K, handling a current of up to 10 A at 250 V AC, ideal for protection against overheating.

Module dedicated to projects related to air quality monitoring. It uses the popular ENS160 and BME280 chips and provides a variety of environmental data such as Air Quality Index (AQI), TVOCs levels, CO2 equivalent (eCO2), atmospheric pressure, humidity and temperature. It communicates via the I2C interface and offers two Qwiic connectors. SparkFun SEN-22858

Multi-functional environmental sensor consisting of SHTC3 temperature and humidity sensor, BMP280 pressure sensor, VEML7700 ambient light sensor and ML8511 UV sensor. DFRobot SEN0500

pH electrode for industrial and laboratory applications. Made of a sensitive, low-impedance glass membrane, it guarantees fast response time and excellent thermal stability. DFRobot FIT0348

A miniature lidar distance sensor that detects objects up to 15 cm away, regardless of color, transparency, or lighting. It generates a digital signal (0 V on detection), operates in the 3-5.5 V range, draws only 30 mA, and supports sleep mode via the ENABLE pin. Ideal for robotics, automation, and contactless interfaces, it offers a fast response time (142 Hz), switching hysteresis, and a compact housing with an indicator LED. Pololu 5554

Air quality sensor module based on the ENS160 system. It communicates via the I2C interface (Gravity connector). DFRobot SEN0514

A miniature lidar proximity sensor that detects objects ranging from less than 1 mm to 50 cm by generating a PWM signal proportional to distance. It operates in a 3-5.5 V range, draws 30 mA, features an ENABLE pin for sleep mode, and a 3-pin JST SH connector and indicator LED. Its color, transparency, and light-sensitive nature make it ideal for robotics, automation, and contactless interfaces. Pololu 5472

Seeed Studio SenseCAP S2105 wireless soil sensor designed for simultaneous measurement of volumetric water content, soil temperature, and electrical conductivity (EC). LoRaWAN® communication, an IP66-rated enclosure, and a replaceable 19 Ah battery enable deployment in smart agriculture, irrigation, and remote soil condition monitoring systems. Seeed Studio 114992871