Ultrasonic Differential Level Meter (FUL31-C)

https://www.fvluokytech.com/products/ultrasonic-differential-level-meter-ful31-c.html

Ultrasonic Differential Level Meter (FUL31-C)
Fvluoky ultrasonic liquid level gauge, using imported American chips and dual frequency, dual-circuit microcomputer processing technology, makes the signal more stable, improves measurement accuracy, and has high stability.