Contents
What is the primary standard for temperature?
The defining instruments of the ITS-90 (International Temperature Scale of 1990) are Standard Platinum Resistance Thermometers (SPRT) and ITS-90 fixed point cells. SPRTs are calibrated in fixed point cells to provide the highest possible temperature accuracy.
What is the difference between a calibrated and a standardized thermometer?
All thermometers are standardized, but not all thermometers are calibrated. In order to manufacture a thermometer, the instrument must be compared to a trace- able reference standard. This report of calibration accompanies the calibrated instrument after the calibration process.
How does the DS18B20 digital temperature sensor work?
The new 1 wire digital temperature sensor represented by DS18B20 integrates temperature measurement and A/D conversion, and directly outputs digital quantities. The structure of the interface circuit with the single-chip microcomputer is simple, and it is widely used in the occasions with long distance and many nodes.
Why are there fakes on my DS18B20?
This was about learning to trust the DS18B20. If you have the sensors on a wire, the wire conducts a surprising amount of heat. This can be an issue when running wiring along pipes. These sensors are very popular, and this seems to have caused fakes to appear.
What kind of thermostat does the DS have?
I am comparing the temperature from the DS with the existing room thermostat (bi-metallic), an RS desktop temperature monitor with two sensors, a small ‘thermo-hygrometer’ and a bi-metallic fridge thermometer (in the upper quarter of its temperature range) †.
Is it OK to use DS18B20 on short cable?
If DS18B20 was on short cable <1cm to my Arduino Pro Micro the readings was 5 degrees more than environment was. On cable lenght >10cm from arduino board and no matter where the resistor was mounted (near arduino or near DS18B20) the readings was fine. Highly active question.