HC-SR04 Ultrasonic Module Distance Measuring Sensor (018-DB-HC-SR04)

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The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package.

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Will you be getting the newer version of these in? The “HC SR04 P”. Apparently the new version runs on 3.3-5v and gives much more stable readings.

Hi Rob,

I haven’t actually been able to find much info on those, have you seen any release notes on them?

Hi Sam,
Only what I’ve been able to find on google (not much- looks to be the same
spec but wider operating voltage). I’m having a bit of trouble with
fluctuating readings with the old ones - not sure if that is down to power
supply instability, rf interference or temperature. I might have to go
laser instead.
Would be interesting to do a direct comparison.

Hmm, ok. I’ve found them to be pretty good, well, as good as a $5 sensor can be. But having said that, if the have tightened up the readings, then that’s always welcome. What material are you using it to detect?

Material plays the biggest part for accuracy with ultrasonic sensors. I’d be surprised to see any huge fluctuations against a solid surface, and not surprised if working with a soft/noise dampening surface.