HC-SR04 ultrasonic sensor to measure the temperature !

Projects General Guidance
1

Hi
i am trying to use HC-SR04 sensor to measure the temperature,
everybody knows, that the speed of sound change when the temperature change,
so if i put something at 7CM denseness from the sensor, the Eco time will be change if the temperature goes up or down

for example c=10,000/29=344.8 m/s. at 22.3 temperature

is there anyone try to do that before!?
i think that will be more sensitive than TMP36 Temperature sensor (or similar)
no contacts, and you can put it under the sun light without having any problems of heating or something

it's more easy to use TMP36, actually there is a snow storm out side :roll_eyes:
from 4 days, and i am trying to repair the heat system :smiley: from things i have
zzzz to cold here :cry:

2

narzan:
everybody knows, that the speed of sound change when the temperature change,

And when humidity changes, and atmospheric pressure, and other stuff too.
Why don't you use a simple DS18B20.

3

Please check - ultrasonic rangefinders, humidity and temperature, (e.g. measuring water levels) - Project Guidance - Arduino Forum -

there is quite some relevant discussion/links