Review on Waterproof Ultrasonic Sensor JSN-SR04T For Arduino: Integrated Distance Measuring Transducer With Improved SEO by Myrv Santamaria

I'm using it to monitor my sump pump with a raspberry pi zero w and raspi-sump. So far it's working very well. I didn't realize that this version of the sensor does 3.3v-5v. I ended up just wiring it up with a voltage divider so it's running in 5v mode. There was a youtube video of a person complaining that the sensor was unreliable but others hypothesized that it might be because he didn't have stable power coming from his arduino. The image shows how the sensor's output doesn't vary much in the 1-1.5ft range but outside of that it can fluctuate a couple tenths of an inch between 10 second readings.There's are also enclosures for the device on thingiverse which is a great plus when looking for a sensor.