A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±10 A range with galvanic isolation. It features a high-sensitivity analog VOUT output with 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 minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5454

Module with 3-axis accelerometer ADXL343 and precise temperature sensor ADT7410 dedicated to Feather series boards. Equipped with a STEMMA QT connector, it communicates via the I2C interface. Adafruit 4147

LPS22DF digital barometer module. It enables pressure measurement in the range from 260 to 1260 hPa and communicates via I2C or SPI. Pololu 2898

Module with 3 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 4243

Small form factor IR camera capable of tracking up to four heat/IR sources, can be controlled with Arduino, AVR via I2C interface. SEN0158

Motion detection module featuring Panasonic\'s EKM series PIR sensor. The EKM series is optimised for detecting small movements and is ideal for detecting movement in a small area around the sensor. It offers digital output in 32 zones with a detection distance of 5 m and a detection area of 90° x 90°. SparkFun SEN-21999

Module with 5 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 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4205

Module with 7 QTRX type optocoupler with analog output. The module operates from 2.9 V to 5.5 V, detects objects at a distance of up to 40 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4447

LiPo battery monitor module based on the MAX17043 chip. Allows the voltage and state of charge of the battery to be measured. SparkFun TOL-20680

A miniature lidar distance sensor that detects objects up to 25 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 (100 Hz), switching hysteresis, and a compact housing with an indicator LED. Pololu 5480

Module with 1 QTR type optocoupler with RC (digital) 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 4141

Module with ammonia sensor made in MEMS technology. It allows gas detection in the range of 1 to 300 ppm and has an analog output. DFRobot SEN0567

A miniature lidar distance sensor that detects objects up to 50 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 (100 Hz), switching hysteresis, and a compact housing with an indicator LED. Pololu 5481

Compact Pololu 5292 current sensor based on the ACS37220 IC, designed for measuring currents up to ±100 A at a 5 V supply voltage in applications requiring galvanic isolation and an analog output. Pololu 5292

Digital sensor dedicated to measuring carbon dioxide (CO2), air temperature and relative humidity. High performance, fast response and excellent stability make it an ideal solution for a variety of applications such as greenhouses, cities, poultry farms and transport stations. Seeed Studio 101991029

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-21273

Module with a humidity sensor. The board is equipped with a Grove connector and communicates via a digital interface. Seeed Studio 101020018

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 5253

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 5254

Digital gas sensor solution that senses a wide range of Total Volatile Organic Compounds (TVOCs), including equivalent carbon dioxide (eCO2) and metal oxide (MOX) levels, intended for indoor air quality monitoring in personal devices such as watches and phones, but we’ve put it on a breakout board so you can use it as a regular I2C device. SEN-14193