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by gsich 2702 days ago
They use optical measurement, are reasonable in pricing. Outputs are UART, PWM and analoge.

They have pins with 2.54mm spacing if that helps you.
1 comments
AYBABTME 2702 days ago
Would you use something else if you meant to solder something on a PCB for medium scale production?
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gsich 2702 days ago
Don't know. There are chemical sensor with a heating element, but those usually suck.
link