Water Level Controllers

LQ-451 - Water Level Controller

Overview

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

 

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

LQ-451 - Pump In Operation

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

 

Pumping Out Control / High-Level Alarm

LQ-451 - Pump Out Operation

 

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

Model LQ-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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