the most accurate temperature sensor?

Hello,

any tips for the most accurate temperature sensor? BMP and DHT are not accurate enough :confused:

You pay for accuracy. State your requirements.

a platinum thermoresistance with a whetstone bridge is the most accurate temperature sensor in the world. the standards class are extremely accurate up to 0,0001 celsius and even better and are extremely expensive as well, there are industrial ones too

Wheatstone bridge, not whetstone!!!

BMP? DHT? Those aren’t part numbers so aren’t helpful - it you’d said what accuracy and
precision you are looking for it would have been less obscure.

drekthral:
Hello,

any tips for the most accurate temperature sensor? BMP and DHT are not accurate enough :confused:

You don't state what is your final application, want to measure air temperature, an aquarium of what??

Anyway, maybe this par is enough accurate for you: LMT70 ±0.1°C Precision Analog Temperature Sensor

Good luck!

That chip only creates an accurate analogue voltage over a wide temp range.
You have to provide the A/D, with an accurate/stable Aref and a better resolution than the sensor.
And calibrate it yourself.
Leo..

drekthral:
Hello, any tips for the most accurate temperature sensor? BMP and DHT are not accurate enough :confused:

Accuracy is always a "system approach" problem; that is, a sensor may also require high percision voltage source and other components such as high percision cold-reference and high percision OpAmps and resistors.

The team answers seem to suggest that we need to know your application (intended use) and as much information about your use environment... lab? Home? Indoors? Outdoors? High-humidity? Etc...

Ray

I love the BMP280 but it's still not what you might call "precision."