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MQ-2 Smoke Gas Module Features MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kinds of gas combinations. They can be calibrated, but, in order to do that, a known concentration of measured gas or gases is necessary. Gas sensor is an indoor module and is used at room temperature. The MQ-2 sensor is suitable for the detection of butane, methane, alcoholic, LPG and smoke. It is also sensitive to ignition and combustion of gases. Note Afte...

GML692 Load Cell Sensor Features Load cells are electronic sensors used to measure weight and force. The structure of a load cell is made of an alloy body and a number of tensile strengths that change value by applying force and return to their original value by removing force. The capacity of a load cell is the maximum amount of force it can withstand. Note To measure tensile strength changes, we use the HX711 module. It is a high-precision analog-to-digital converter. Note 2 If you w...

YF-S201C Water Flow Sensor Features YF-S201C is a sensor used to measure the water flow. This water flow sensor mainly consists of a plastic valve body, rotor assembly, and hall effect sensor. This module works based on the hall magnetic effect. So when water flows through the rotor assembly, the rotor will rotate and the hall effect sensor will produce an electric pulse. By counting these generated pulses, the amount of water passing through the sensor can be calculated.The measuring range of water fl...

SR602 PIR Motion Detection Sensor Features PIR or Passive Infra-Red sensors detect motion based on infrared light of ambient heat. PIR sensors are commonly used in security alarms to detect the presence of human. The SR602 sensor is able to detect movement up to a distance of about 3 meters. This sensor has a digital output. When it detects motion, output will be High and it last 2.5 second. After that it returns to LOW. Note You can adjust sensitivity and HIGH time duration usin...

SW-520D Vibration Tilt Sensor Features The SW-520 sensor consists of two metal balls which switches as a trigger. When the switch is positioned horizontally, and when the sensor angle is less than 10°, the circuit is open (off state) and more than 10°, it is closed (on stated). But when the switch is positioned vertically, the circuit is open when the sensor angle is less than 45°, and close when the angle is more than 45°. To see exactly how this sensor works, read the datasheet. The SW-520D sensor is ...

OMRON Photoelectric Sensor Features The Omran photoelectric sensor can be used to detect obstacles and objects at 5 to 100 mm distance. There is an LED on the sensor that is always off and turns on when it detect an obstacle. You can also change the LED status using the potentiometer which is on sensor. (That is, the LED is always on and will turn off when the obstacle is detected.) There is another potentiometer on the sensor that can be used to change the sensitivity of the sensor (increase or decrease th...

SR04 Ultrasonic Sensor Features The SRF04 ultrasonic distance sensor can be used to measure distance with high accuracy. The basic working principle of this sensor is that it produces a high-level signal and sends it to the obstacle. Then the receiver detects the returned wave. The time between the transmission and reception of the signal allows us to calculate the distance to an object. Note When the Trig pin is set High, the sensor generates and sends ultrasonic sound. At that moment the Ech...

Overview In many projects such as flying robots, weather stations, improving routing performance, sports etc. measuring pressure and altitude is very important. In this tutorial, you’ll learn how to use the BMP180 sensor, which is one of the most commonly used sensors for measuring the pressure. https://electropeak.com/learn/wp-content/uploads/2019/07/Bmp-Cover-Video.compressed-2.m4v What You Will Learn What the barometric pressure is. What the BOSCH BMP180 pressure sensor is. ...

SHT10 Temperature Humidity Sensor Features The SHT10 module is a high accuracy sensor for measuring temperature and humidity. This module can be easily connected to a variety of microcontrollers using two digital output pins. One for data transfer and the other for adjusting data transfer speed between the module and the microcontroller. The range of temperature measurement is -40 to +123.8 degrees Celsius with 0.01 degrees Celsius accuracy. The humidity range is 0 to 100% with 0.05% accuracy. This module i...

DHT21/AM2301 Temperature and Humidity Sensor Features The AM2301 / DHT21 temperature and humidity sensor consists of two sensors: A capacitive humidity sensor and a thermistor. This sensor transmits data using a single digital pin, so it can communicate with the microcontroller using only one digital pin. The sampling frequency is 0.5Hz, which means that you can get new data every two seconds. DHT21/AM2301 Temperature and Humidity Sensor Pinout This Module has 3 w...