For reliable level measurement in sewage treatment plants, a waterproof magnetostrictive level gauge must combine sealed construction with stable sensing performance. Typical technical parameters include a measuring range from 300 mm to 6000 mm, with custom ranges available. Accuracy is +/-0.5 mm or +/-0.05% FS, and resolution is 0.1 mm. The probe uses 24 VDC power (18-36 VDC) and provides 4-20 mA, RS485/Modbus, or HART output. Repeatability is <=0.1% FS, and response time is below 100 ms. The gauge withstands medium temperatures from -20 to 80 degrees C and ambient temperatures from -40 to 70 degrees C. Process pressure is up to 1.6 MPa. Its IP68 waterproof housing and sealed cable entry suit wet wells, aeration tanks, grit chambers, and sludge tanks. Wetted parts use 304/316L stainless steel, PVC, or PTFE for corrosion resistance. The display supports local reading, while the float and rod are designed for anti-blocking and anti-fouling. Optional explosion-proof and lightning protection versions are available. Installation uses flange, thread, or bracket mounting. Specs also include insulation resistance >=100 M-ohm at 500 VDC, reverse-polarity protection, and surge protection. The magnetic float and waveguide provide absolute position without recalibration. Optional cable length reaches 100 m, and probe diameter is typically 10-16 mm. With strong anti-interference, long-term stability, and low maintenance, the gauge delivers continuous level data for sewage treatment control.