... please contact us Integrated ultrasonic level meter LLXK-MR series resistance rotary sealing material level controller: Application l metallurgy, ... coal, building materials, medicine and other fields material level alarm and control l high dust explosion-proof special environment ... Medium density ≥ 0.3g/cm3 (large leaves) Ambient temperature -30 ~ +80 °C Power supply AC24V, 110V, 220V, 50/60Hz; DC24V ...