Level monitoring relays


They monitor the level of conductive liquids in wells, tanks, reservoirs, etc. They can monitor from one to six levels of water with optional fill / drain functions. These are either separately marketable products, or directly involved in the setup with a contactor or motor starter.

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Product detail


  • Relay is designed to control the level of conductive liquids in wells, tanks, pools, tankers, reservoirs,… (replacement HRH-1).
  • Galvanically isolated supply and guard circuits.
  • Within one device, the following confi gurations can be selected:
    – 2x one-level monitoring (in separate tanks)
    – 1x two-level monitoring (in one tank) – pumping from one tank to another.
  • DIP switch selection on the front panel (8 functions).
  • Adjustable probe sensitivity (for each probe separately).
  • Adjustable relay switching delay (for each probe separately).
  • 10 Hz watch frequency prevents polarization of the liquid and increases resistance to interference by network frequency


  • Output: 1 or 2x CO, 16 A
  • Sensitivity: 5-100 kΩ
  • Number of functions: 8
  • Housing: 1 or 3-MODULE
  • Supply voltage (frequency): AC/DC 24 V; AC 110 V; AC 230 V; AC 400 V (AC 50/60 Hz)
MIT Maximize Integrated Technology Co.,Ltd.

MIT Maximize Integrated Technology Co.,Ltd. is a global leader in power quality, industrial automation and power control product and service solutions. Products include circuit breakers, switchgear, UPS and DC power systems, power distribution units, motor controls, meters, sensors, relays and inverters. The principal markets for the Electrical Sector are industrial, institutional, government, utility, commercial, residential, information technology, telecommunications and original equipment manufacturer customers.