This is a simple to use motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. This unit works great from 5 to 12V (datasheet shows 12V). You can also install a jumper wire past the 5V regulator on board to make this unit work at 3.3V. Sensor uses [email protected]. SEN-13285

This disc load cell (sometimes called a strain gauge) can translate up to a whopping 200kg of pressure (force) into an electrical signal. Each load cell is able to measure the electrical resistance that changes in response to, and proportional of, the strain (e.g. pressure or force) applied to the disc. SEN-13332

A module with a motion sensor that uses microwaves to detect moving objects. It is powered with the voltage of 5 V and has a digital output. DFRobot SEN0521

Module with ToF VL53L5CX sensor with a matrix of 64 pixels and a range of up to 4 m. Communicates via the I2C interface. Pololu 3417

Module with gas sensor designed to monitor indoor air quality. It was based on the AMS CCS811 system that allows the detection of volatile organic compounds (VOCs) in the air. Digilent 410-386

Temperature and relative humidity sensor, equipped with HIH6130-021-001 system with I2C interface. MOD 68

Module with 16 QTRX 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 50 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4356

Module with a temperature and humidity sensor based on the SHT31-D system. Equipped with a STEMMA QT connector, it communicates via the I2C interface. Adafruit 2857

Module with 16 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 50 mm. The sensor will be used in projects that require detection of changes in the ground, e.g. in linefollower robots. Pololu 4456

A miniature lidar distance sensor that detects objects up to 200 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 (30 Hz), switching hysteresis, and a compact housing with an indicator LED. Pololu 5491

A miniature lidar proximity sensor that detects objects within a range of 1 mm to 130 cm by generating a PWM signal proportional to distance. It operates within a 3-5.5 V range, draws 30 mA, and features an ENABLE pin for sleep mode. It also includes a 3-pin JST SH connector and an indicator LED. Its color, transparency, and light-sensitive properties make it ideal for robotics, automation, and contactless interfaces. Pololu 5485

Pololu - 2737

The LSM6DS33 combines a digital 3-axis accelerometer and 3-axis gyroscope into a single package. The sensor provides six independent acceleration and rotation rate readings whose sensitivities can be set in the ranges of ±2 g to ±16 g and ±125°/s to ±2000°/s, available through I²C and SPI interfaces.

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 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 5455

Temperature and humidity sensor SHT10 with a stainless probe. Provides high temperature and pressure resistance. DFRobot SEN0148

LM35 analog temperature sensor module. It allows you to measure the temperature in the range from 0°C to 100°C with a resolution of 0.5°C

A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±30 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 5447

Flow sensor with thread G3/4. Dedicated to liquids of high concentration and low viscosity. DFRobot SEN0551

Maxbotix XL-MaxSonar-AE0 Sonar Range Finder MB1300

SEN-13676