LQ-451 – WATER LEVEL CONTROLLER

The LQ-451 monitors the level of conductive liquids and can be configured to perform any one of the following functions:

  • High-Level Alarm
  • Low Level Alarm
  • Pumping In Control
  • Pumping Out Control
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Features

  • Mains Isolated Electrode Circuit
  • Safe Electrode Operating Voltage: 25 Volts (max)
  • Relay Output: DPDT
  • Relay Contact Rating: 5A @ 240VAC
  • DIN Rail Mountable

 

OPERATION

PUMPING IN CONTROL / LOW-LEVEL ALARM

PUMPING OUT CONTROL / HIGH-LEVEL ALARM

The relay in the unit is configured to energise and start the pump motor (or provide a high-level alarm signal) when the water level reaches the upper electrode (P1). The relay will remain on, until the water level falls below the lower electrode (P2)

Specifications

ModelLQ-451
Supply Voltage:230 VAC (+/-10%) / 50 to 60 Hz
Electrode Circuit:25 Vmax (Open Circuit), Isolated from Mains via Transformer
Operating Temp:5 to +50 degC
Relay Output:DPDT, 5A @ 240VAC (resistive)
Modes:The following modes are selectable (via jumpers):

Mode A: Pumping In / Low-Level Alarm

Mode B: Pumping Out / High-Level Alarm

Mounting:DIN-Rail Mountable
Weight:300 g
Dimensions:H112 x H55 x D73 mm

ORDERING INFORMATION (PART NUMBERS)

  • LQ-451(HL/PI) – Level Controller (Factory configured for High-Level Alarm and/or Pumping In Control)
  • LQ-451(LL/PO) – Level Controller (Factory configured for Low-Level Alarm and/or Pumping Out Control)

 

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