Introduction
A temperature sensor is a device that measures the temperature of a physical system and converts the temperature into an electrical signal that can be read and processed by a controller or computer. Temperature sensors can be classified into two main categories: contact and non-contact. Contact sensors, such as thermocouples and resistance temperature detectors (RTDs), physically touch the object or surface being measured, whereas non-contact sensors, such as infrared sensors, measure the temperature of an object by detecting the thermal radiation emitted by the object. Some common types of temperature sensors include thermocouples, RTDs, thermistors, infrared sensors, and thermopiles. They are used in a wide range of applications such as HVAC, industrial process control, home appliances, automotive, medical, IoT and many others.
Here is a list of some temperature sensors that are commonly used in IoT applications along with their respective resolutions, accuracy, communication, Operating temperature, Operating voltage, and typical applications:
- DHT11:
- Resolution: 0.1 °C
- Accuracy: ±2 °C
- Communication: Single-wire
- Operating temperature: -40 to 80 °C
- Operating voltage: 3.3-5.5V
- Application: Indoor temperature and humidity monitoring, HVAC control
- Datasheet
- DS18B20:
- Resolution: 0.5 °C
- Accuracy: ±0.5 °C
- Communication: 1-Wire
- Operating temperature: -55 to 125 °C
- Operating voltage: 3.0-5.5V
- Application: Temperature monitoring in industrial and automotive applications
- Datasheet
- TMP102:
- Resolution: 0.0625 °C
- Accuracy: ±0.5 °C
- Communication: I2C
- Operating temperature: -40 to 125 °C
- Operating voltage: 2.7-5.5V
- Application: Temperature monitoring in industrial and automotive applications
- Datasheet
- LM35:
- Resolution: 0.01 °C
- Accuracy: ±0.4 °C
- Communication: Analog
- Operating temperature: -55 to 150 °C
- Operating voltage: 4-30V
- Application: Temperature monitoring in industrial and automotive applications
- Datasheet
- BME280:
- Resolution: 0.01 °C
- Accuracy: ±0.1 °C
- Communication: I2C/SPI
- Operating temperature: -40 to 85 °C
- Operating voltage: 1.71-3.6V
- Application: Temperature, humidity and pressure monitoring in weather stations, HVAC systems
- Si7021:
- Resolution: 0.01 °C
- Accuracy: ±0.2 °C
- Communication: I2C
- Operating temperature: -40 to 125 °C
- Operating voltage: 2.1-3.6V
- Application: Temperature and humidity monitoring in weather stations, HVAC systems
- Datasheet
- SHT31:
- Resolution: 0.01 °C
- Accuracy: ±0.1 °C
- Communication: I2C
- Operating temperature: -40 to 125 °C
- Operating voltage: 2.1-3.6V
- Application: Temperature and humidity monitoring in weather stations, HVAC systems
- Datasheet : https://sensirion.com/products/catalog/SHT31-DIS-B/
- TMP006:
- Resolution: 0.01 °C
- Accuracy: ±0.1 °C
- Communication: I2C
- Operating temperature: -40 to 85 °C
- Operating voltage: 1.7-3.6V
- Application: Non-contact temperature monitoring in industrial, medical and automotive applications
- Datasheet
Please note that the accuracy, resolution and other specifications of these sensors may vary depending on the manufacturer and the specific device. It is recommended to check with the manufacturer or supplier for the most up-to-date specifications.
