Mainly producing Ultrasonic Level Meter, Ultrasonic Depth Meter, adopting the ultrasonic principle, have perfect function to measure the water depth and the sludge depth, the instrument could be custom-made for special condition, and Explosion-proof is available too. GE-103P Portable Ultrasonic Echo Sounder Depth Meter Ultrasonic Sludge Interface Depth Level Measurement Meter GE-103P Portable Ultrasonic Echo Sounder Depth Meter GE-102S Ultrasonic Sludge Interface Depth Level Meter