HT306 Liquid or Water Level Controller (H,M,L level)/Electronics DIY

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Introduction

HT306 Liquid Level Controller ( High, MEDIUM and Low level).

This water level controller has 3 levels indicator with 2 sensor inputs.

Place sensor S1 higher than S2

S1 is high level sensor, while S2 is Middle level sensor.

The LED indicator is as following:

LED1: High Level

LED2: Middle Level

LED3: Low Level

LED4: Relay ON

When both sensors are dry, LED3 will light up means LOW level. When water reached S2, LED2 light up means MEDIUM Level. When the water level continue rises until reached S1, LED1 light up means HIGH Level. At the same time Relay is energized and LED4 is illuminate.

If the water level is falling, and below S1( high Level), LED1 OFF and LED2 on , but the relay continue turn on, same as LED4 is on.

When the water level  below S2, Relay is switched off, and only LED3 on. 

Conclude: The relay will turn on when the water reached high level and will turn off when below middle Level.

Specification

• Working Voltage: 9V-12VDC
• 3 Level LED Indicator 
• With Relay output ( can control AC or DC load)
• If need more level control can connect Relay board HT572 to the circuit   

 Note

• You need to have a soldering skill and basic knowledge of testing
• For any inquiry or other technical problem please email us!
• Email: Nikkoleofockxing@hotmail.co.uk