The arduino turbidity sensor detects water quality by measuring level of turbidity. It is able to detect suspended particles in water by measuring the light transmittance and scattering rate which changes with the amount of total suspended solids (TSS) in water. SEN0189

A module with an EMG sensor that detects the activity of human muscles and neurons. Generates an analog signal in the range from 0 to 3 V on the output, it does not require the use of a conductive gel. DFRobot SEN0240

DFRobot Gravity analog light intensity module for Arduino and Raspberry Pi. DFRobot DFR0026

ACS724LLCTR-05AU current sensor module with a current measurement range from 0 to 5 A. It communicates via an analog interface. Pololu 4048

Module with ENS160 gas sensor for measuring the concentration of carbon dioxide (eCO2) and volatile organic compounds (TVOC) in the air. It communicates via the I2C or SPI interface. Adafruit 5606

Laser scanner using ToF technology. It takes measurements at 2 to 8 revolutions per second and has a range of up to 8 m. It communicates via a UART interface. Waveshare D200 LiDAR Kit

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

BMP390 digital barometer module. Measures pressure from 300 to 1250 hPa and temperature from -40℃ to 85℃. It communicates via an I2C or SPI interface. Waveshare BMP390 Barometric Pressure Sensor

Module with a Geiger counter that allows the detection of ionizing radiation. Equipped with a Gravity connector. DFRobot SEN0463

IR distance sensor with a range of up to 400 cm. It has a digital output that changes its state when the sensor detects an object. DFRobot SEN0531

Module with 1 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 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4401

Module with 1 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 30 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4441

The GP2Y0A60SZ distance sensor from Sharp offers a wide detection range of 4″ to 60″ (10 cm to 150 cm) and a high update rate of 60 Hz. The distance is indicated by an analog voltage, so only a single analog input is required to interface with the module.

A module with a rotary encoder and RGB LED lighting for M5Stack sets. It communicates via the I2C interface. M5Stack U135

Soil moisture sensor based on soil resistivity meansurement

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

ToF distance sensor (Time of flight) with a range of up to 5 m. The module is supplied with the voltage of 3.3 V and communicates via the I2C interface. SparkFun SEN-19036

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

TMAG5273 Hall sensor module dedicated to detecting the presence, strength and direction of a magnetic field in three dimensions. It uses communication via the I2C interface and Qwiic connectors. SparkFun SEN-23880

ToF distance sensor (Time of flight) with a range of up to 5 m. The module is supplied with the voltage of 3.3 V and communicates via the I2C interface. SparkFun SEN-19451