Adafruit has today announced the availability of a new PT1000 RTD Temperature Sensor Amplifier MAX31865, which is now available to purchase directly from the online Adafruit electronics store priced at $14.95. The Platinum RTD or resistance temperature detectors offer sensors that contain a resistor that changes its resistance value as its temperature changes. Electronic enthusiasts, makers and hobbyists looking for the best way to access precision and accuracy out of your PT1000 RTD Adafruit explains that you must use an amplifier that is designed to read the low resistance or even better still have an amplifier that can automatically adjust and compensate for the resistance of the connecting wires.
Adafruit explains more about the new Adafruit PT1000 RTD Temperature Sensor Amplifier – MAX31865, which is available to purchase by following the link below.
We’ve carried various MAXIM thermocouple amplifiers and they’re great – but thermocouples don’t have the best accuracy or precision, for when the readings must be as good as can be. The MAX31865 handles all of your RTD needs, and can even compensate 3 or 4 wire RTDs for better accuracy. Connect to it with any microcontroller over SPI and read out the resistance ratio from the internal ADC. We put a 4300Ω 0.1% resistor as a reference resistor on the breakout. We have some example code that will calculate the temperature based on the resistance for you.
For precision temperature sensing, nothing beats a In this sensor, the resistor is actually a small strip of Platinum with a resistance of 1000 ohms at 0°C, thus the name PT1000. Compared to most NTC/PTC thermistors, the PT type of RTD is much most stable and precise (but also more expensive) PT1000’s have been used for many years to measure temperature in laboratory and industrial processes, and have developed a reputation for accuracy (better than thermocouples), repeatability, and stability. If you’re looking for a great RTD sensor, today is your lucky day because we have a lovely Adafruit RTD Sensor Amplifier with the MAX31865 breakout for use with any 2, 3 or 4 wire PT1000 RTD!
Source: Adafruit
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