Module with a 3-axis MMC5983MA mega-meter. Equipped with a Qwiic connector, it communicates via the I2C interface. SparkFun SEN-19921

Magnetic switch (reed switch) enclosed in a plastic housing. It has a compact structure and low weight. DFRobot SEN0481

The ACS72981 current sensor module uses the Hall effect to accurately and safely measure AC and DC current, providing electrical isolation of the current path. With a wideband analog output (up to 250 kHz) and low conduction resistance (0.2 mΩ), it minimizes energy loss and offers a fast response time of less than 2 µs. Pololu 5271

Distance measurement tester designed for HC-SR04 ultrasonic sensor. It is equipped with a 3-digit 7-segment LED display showing the current measurement and a measurement processing system with UART output

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 A range with galvanic isolation. It features an analog VOUT output with a sensitivity of 66.7 mV/A and a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and the low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5443

IR optical sensor module based on a slotted optocoupler. It enables the construction of an incremental encoder

Analog PT1000 temperature sensor with a wide measurement range from -50°C to 300°C. High sensitivity allows for quick response to temperature changes. It is an excellent choice for many industrial applications. Seeed Studio 314010819

Current-to-voltage converter module designed for devices with a current signal output. It allows linear conversion of current signals from 0 to 25 mA into voltage signals from 0 to 3 V. DFRrobot SEN0262

Hall effect sensor module based on the Allegro A1101 IC, designed for digital magnetic field detection, compatible with the Crowtail system and Arduino microcontrollers. Elecrow CT0024HS

A modern module that enables gesture control and detects the presence of people, ensuring privacy and fast offline interactions. Equipped with a camera and an AI processor, the sensor recognizes 5 hand gestures and detects up to 10 faces within a range of 3 meters, supporting I2C and UART communication, making it an ideal solution for IoT, smart homes and touchless systems. DFRobot SEN0626

Compact current sensor based on TMR technology, enabling precise measurements up to 30 A with minimal energy losses. Thanks to a wide 1 MHz bandwidth, galvanic isolation and interference immunity, it is perfect for applications requiring fast response and high accuracy. Pololu 5317

Ambient light sensor housed in a transparent hemisphere and waterproof housing. It supports a detection range of 0 to 65535 lux and communicates via an I2C interface. DFRobot SEN0562

The Gravity Occupancy Sensor uses 24 GHz FMCW radar technology, enabling precise presence detection at a distance of up to 8 meters and movement and distance measurement up to 12 meters. Thanks to its high resistance to environmental interference, it works reliably regardless of light, temperature or dust, effectively detecting both static and dynamic objects. Compatibility with Arduino, ESP32, Raspberry Pi and a simple Gravity interface make it an ideal solution for intelligent lighting, building automation and security systems. DFRobot SEN0610

Capacitive soil humidity sensor with I2C interface powered by 3-5V. Adafruit 4026

Volatile gas sensor module, including LPG, natural gas, natural gas

The module with the MAX30100 chip that monitors the oxygen content in the blood and the heart rate. It consists of two LED diodes, a photodetector, optimized optics and low noise analog signal processing. modMAX30100

The module allows the detection of volatile organic compounds (VOC) in the air, based on Winsen\'s WSP2110 system. Allows for detection in the air; formaldehyde (HCHO), methane, benzene, toluene, alcohol, etc. The sensor output is an analog signal. Seeed studio 101020001

A set with opening and closing sensors based on a reed switch, intended for installation on doors or windows. CMD1263

A module with a high precision temperature sensor based on the STS35 system. It allows measurement with an accuracy of ±0.1° C and communicates via the I2C interface. DFRobot SEN0434

Module with temperature and humidity sensor DHT11. It allows you to measure humidity in the range of 20 ... 90% and temperature (0 ... 50 ° C). DFRobot DFR0067