Maintainer: Seeed Studio. This differences in the readings was due to the radiated heat inside the room. The LM35 seems to have self heating of 0.1 degrees celsius according to the datasheet. I don't really recommend cutting of the sensor island though unless you really know what you are doing. 3 years ago. Then I moved over to the Dallas DS18B20 one-wire temperature sensors to increase accuracy. If you need fast reactions to temperature changes and temperatures in the class of 1000 ºC thermocouples of type K are propably your best bet. The only solution we could find was to use the TSYS01 digital output single chip temperature sensor by Measurement Specialties and communicate with it using a Arduino microcontroller. * TSYS01 Temperature Sensor Board, 25$ from http://www.elecrow.com/tsys01-temperature-sensor-b... * 3.3V 8 MHz Arduino Pro Mini + USB Serial Converter, ~7$: (Search ebay for: Pro Mini atmega328 3.3V 8M Arduino Compatible+CP2102 USB 2.0 to UART TTL module). Reply The calibrated sensor does ofcourse also need to be relatively low noise and high resolution and you would need to build a temperature controlled box of some kind. You should connect the TSYS01 for the communication method you chose in the previous step. It is one of the most popular temperature sensors on the market and provides fairly high accuracy (±0.5 °C) over a large temperature range (-55 °C to + 125 °C). on the market but today, I’ll be recommending the Grove – I2C High Accuracy Temperature Sensor(MCP9808) here at Seeed!. An interesting project/use for the tsys01 that comes to mind might be to calibrate cheaper temperature sensors for higher absolute accuracy. Author: Seeed Studio. 258,423 views; 160 comments; 367 respects; DIY Arduino hot air SMD rework station. MCP9802 : MCP9802 Driver (12-BIT Temperature Sensor with I2C Interface) MCP9808 : Arduino Library for Microchip MCP9808 Maximum Accuracy Digital Temperature Sensor. If you have never used an Arduino microcontroller you can get started by using this instructable: https://www.instructables.com/id/Intro-to-Arduino/ I will not go into detail on how to use the Arduino platform on this instructable, but will only focus on the usage of the TSYS01 temperature sensor board with an Arduino. A temperature sensor can be find in the low price range between 0.5-10$ on most of the Asiatic known commerce platforms as well as in your local electronics shops. From this I would deduce that the DS18B20 is quite a good sensor for the price. I did some preliminary testing with two tsys01 sensors connected to one another through the copper pad in room temperature of about 20 degrees and I remember the difference being around 0.03 degrees C. However, I would need to design a longer experiment to get more reliable results. This I2C digital temperature sensor is one of the more accurate/precise we've ever seen, with a typical accuracy of ±0.25°C over the sensor's -40°C to +125°C range and precision of +0.0625°C. The tsys01 chip communicates outside with digital signals. On the other hand, an analog temperature sensor with a proclaimed accuracy of ± 0.1°C might still produce inaccurate results after the value is converted to a digital value by an ADC (https://en.wikipedia.org/wiki/Analog-to-digital_converter). No need for calibration (also internal factory calibrated). While studying in university we were challenged as part of a course work into designing a box with very accurate temperature control. Each outdoor sensor was connected to the circuit via a 2.5m twin core microphone cable. The downside of the TSYS01 is that it is remarkably difficult to use without a nicely designed temperature sensor board. Atleast most Arduinos should have internal pull-up resistors for the I2C data lines. Having the 4 sensors side by side on a breadboard, I noticed that the slightest airflow will create a difference between the 4 sensors. So few regulators are reverse protected and so often I accidently swap the power pins. Suggest corrections and new documentation via GitHub. Hey, thanks for the reply Apocalyt, I didn't realized that the borad alyo doubles as a tiny breakout. FOr some reason, I love to measure temperature. The TSYS01 Temperature Sensor Board supports SPI and I2C communication. Have you measured how much the temperature values vary between different measurements in the same temperature? Knowing the temperature with high accuracy can be crucial in many situations and for that you need to be well informed about sensors technical specifications. Pins of the device and it will handle 4 to 30 supply voltage range as well -55C. 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