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Seeed Temperature Sensor Selection Guide

Here at Seeed, we have released different Temperature Sensors and this may cause problems for some of you where you don't know which one to pick and which one is suitable for your needs. Here comes the solution! Please check the comparison in this site for more reference.

For all the Temperature sensors in our bazaar, please click Bazaar Temperature Sensor tag to check.

What is Temperature Sensor

First of all, let us figure out a basic question “Why do we need a temperature and humidity sensor”.

Well, humidity and temperature are closely related from the physical quantity itself to the actual people’s lives.

  • Temperature

We all know about temperature, it is one of the 7 basic physical quantities in the International System of Units, and it is a physical quantity used to measure the degree of heat and coldness of objects.

  • Humidity

Then, what about humidity? Humidity is the concentration of water vapour present in the air. The relative humidity of air is commonly used in life, expressed in %RH. Relative humidity is closely related to temperature. For a certain volume of sealed gas, the higher the temperature, the lower the relative humidity, and the lower the temperature, the higher the relative humidity.

The temperature and humidity of people’s environment will directly affect people’s body temperature regulation function and heat conduction effect. It will further affect the thinking activity and mental state, thus affecting the efficiency of our study and work. Therefore, we need temperature and humidity sensors

Temperature Sensors at Seeed

Which One is Best For You

Products Grove - Temperature Sensor V1.2 Grove - High Temperature Sensor Grove - Temperature & Humidity Sensor (DHT11) Grove - Temperature & Humidity Sensor (SHT31) Grove - MLX90615 Digital Infrared Temperature Sensor Grove - DHT22 Temperature & Humidity Sensor Pro (AM2302) Grove - Infrared Temperature Sensor Array (AMG8833) Grove - CO2 & Temperature & Humidity Sensor for Arduino (SCD30) - 3-in-1 Grove - I2C High Accuracy Temperature Sensor - MCP9808 Grove - AHT20 I2C Industrial Grade Temperature and Humidity Sensor Grove - Temp&Humi Sensor (High-Accuracy & Mini) Grove - Temperature, Humidity, Pressure and Gas Sensor for Arduino - BME680 Grove - 1-Wire Thermocouple Amplifier (MAX31850K)
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Interface Analog Analog Digital I2C I2C Digital I2C I2C I2C I2C I2C I2C I2C
Temperature Range -40 ~ 125°C -50 ~ 600°C -20 ~ 60°C -40 ~ 125°C -40 ~ 85°C -40 ~ 80℃ -0 ~ 80°C -40°C ~ 70°C -40 ~ 125°C -40 ~ 85°C 0 ~ 70 °C -40 ~ 85°C -270°C ~ 1768°C
Temperature Accuracy ±1.5ºC ±2.0% + 2ºC ±2% (Typical) ±0.3°C ±1°C ±0.5% (Typical) ±2.5°C ±0.5°C ±0.25°C ± 0.3°C ±0.5°C ±0.5°C ±0.25°C
Humidity Range / / 5 ~ 95% RH 0% - 100% RH / 0 ~ 100% RH / 0 – 95 %RH / 0 ~ 100% RH 0% - 80% RH 0‒100% RH /
Humidity Accuracy / / ±5% (Typical) ±2% / ±2% (Typical) / ±2 %RH / ±2% RH ±4.5% RH ±3% RH /
Resolution / / / / ±0.02°C / 8 x 8 (64 pixels) / / Temperature: 0.01°C, Humidity: 0.024% RH / / /

Quick Insight

Common temperature & humidity sensors for Arduino

Grove - Temperature & Humidity Sensor (DHT11)

When we talk about temperature and humidity sensor, DHT series is the most common used. They are all automatically calibrated, very easy to use and have a very good Arduino software library, which is very popular with maker.

Grove - AHT20 I2C Industrial Grade Temperature and Humidity Sensor

AHT20 is a recently released industrial grade temperature and humidity sensor. Its humidity measurement range reaches an astonishing 0-100%RH! The new MEMS capacitive humidity sensing element makes it have far better performance than traditional capacitive sensors.

How to select the best one suit for your project

Different temperature and humidity sensors have large performance differences and large price differences. So how to choose the most suitable sensor for your project?

Measure Range

As with the measurement of weight and temperature, the selection of the humidity sensor must first determine the measurement range. Except for meteorological and scientific research departments, temperature and humidity measurement and control generally do not require full humidity (0-100% RH) measurement. Generally speaking, the wider the range and the higher the price, just choose the range that meets your project needs.

Humidity Accuracy

The accuracy of measurement is the most important index of the humidity sensor. For every percentage point increase, it is a step or even a grade for the humidity sensor. Because different precisions are to be achieved, their manufacturing costs vary greatly, and their selling prices vary widely.

In normal projects, DHT11 is sufficient. The measurement range of 5 ~ 95% RH will satisfy most applications.

If your arduino project needs a wider measurement range and higher accuracy, such as medical, weather station, then we recommend DHT22.

When your project requires industrial-grade sensors, then there is no doubt that AHT20 will be very suitable.

Application Ideas

  • Industrial Freezers and Refrigerators
  • Food Processing
  • Personal Computers and Servers
  • PC Peripherals
  • Consumer Electronics
  • Handheld/Portable Devices
  • Home automation

Useful Projects

Toilet Management System: Using the system multiple persons can share a single toilet efficiently.

MediaTek Open Source Hardware Plant Health Monitor

Temperature Humidity Data Logger: This project helps to monitor temperature and humidity values of a particular location along with device battery level.

LinkIt ONE IoT Demo: An IoT demo made by LinkIt ONE.

Automated Snake Enclosure with Camera: Interactive snake enclosure that is temperature and humidity controlled and uses lat-long to mimic natural light cycles, with an online cam.

Foton - The connected lightsaber: Foton is a special lightsaber, which can monitor temperature and humidity of a room, detect movements, and send those data to a smartphone.

Smart Mali: A Smart Pot for Indoor Gardening! {Wondering what Mali means?}

Cold Transport Chain Monitoring and Tracking: IoT based solution to make delivery of temperature sensitive perishable products more efficient and to reduce wastage.

Resource

Grove - Temperature Sensor Lesson

Tech Support

Please submit any technical issue into our forum.