Liquid Level Control Relay, Level Monitoring, SPDT, AC/DC 24-240V

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$65.72

Liquid level control relay is a key automated liquid level monitoring component. The SPDT design of the liquid level control relay allows the relay to switch between two independent load circuits, such as pump start stop control or alarm signals, when the liquid level changes. This liquid level control relay is compatible with both AC and DC power sources, with a wide voltage range from 24V to 240V, making it suitable for most industrial power supply environments.

SKU: ATO-MR-GRL8

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Overview

Liquid level control relay is a component specifically designed for automated liquid level monitoring, which achieves precise control of liquid level through SPDT switches and can operate reliably within the voltage range of 24-240V under AC and DC power sources. Designed for monitoring level in wells, basins, reservoirs, tanks. When the liquid level reaches the preset high and low threshold, it will automatically connect or disconnect the circuit, ensuring the safe operation and effective management of the equipment.

Feature

ln one device you can choose the following configurations: 2 level control mode or 1 level control mode.
Choice of function PUMP UP, PUMP DOWN.
Adjustable time delay on the output (0.1-10s).
Sensitivity adjustable by a potentiometer (5-100kΩ).
Galvanically separated supply voltage AC/DC 24-240V.
Relay status is indicated by LED.
1-MODULE, DIN rail mounting.

Specification

Model	ATO-GRL8-02
Function	2 or 1 level control mode
Supply terminals	A1-A2
Voltage range	AC/DC 24-240V (50-60Hz)
lnput	max.2VA
Supply voltage tolerance	-15%; +10%
Sensitivity (input resistance)	adjustable in range 5 kΩ-100 kΩ
Voltage in electrodes	max.AC 5V
Current in probe	AC<0.1 mA
Time response	max.400 ms
Max.capacity length	800 m (sensitivity 25 kΩ), 200 m (sensitivity 100 kΩ)
Max.capacity of probe cable	400 nF (sensitivity 25kΩ), 100 nF (sensitivity 100 kΩ)
Time delay (t)	adjustable, 0.1-10s
Accuracy in setting (mechanical)	±10 %
Temperature coefficient	0.05%/℃, at=20℃ (0.05%°F, at=68°F)
Output	1×SPDT
Current rating	10A/AC1
Switching voltage	250VAC/24VDC
Min.breaking capacity DC	500mW
Output indication	red LED
Mechanical life	1×10⁷
Electrical life (AC1)	1×10⁵
Reset time	max.200ms
Operating temperature	-20℃ to +55°C (-4°F to 131°F)
Storage temperature	-35°C to +75°C (-22°F to 158°F)
Mounting/DIN rail	Din rail EN/IEC 60715
Protection degree	IP40 for front panel/IP20 terminals
Operating altitude	≤2000m
Operating position	any
Overvoltage cathegory	Ⅲ.
Pollution degree	2
Max.cable size (mm²)	solid wire max.1×2.5 or 2×1.5/with sleeve max.1×2.5 (AWG 12)
Dimensions	90×18×64mm
Weight	81g
Standards	GB/T 14048.5, EN 60255-1

Wiring Diagram

Functions Diagram

Panel Diagram

Dimensions (mm)

Tips: Working principle of the liquid level control relay

A liquid level relay is a relay that controls the liquid level and has electronic circuits inside. Utilize the conductivity of liquids, when the liquid level reaches a certain height, the relay will act to cut off the power supply. Turn on the power to start the water pump when the liquid level is below a certain level. Achieve the function of automatic control. Automatic control consists of sensors and control actuators. The sensor of the liquid level controller is usually a wire. Utilize the conductivity of water. Water has poor conductivity and cannot directly drive relays. So electronic circuits need to amplify the current to drive the relay to work.

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