The scr in my case is not needed so i can use n1 gate to turn on an extra led placed at the correct place for a more accurate water level indicator and include a buzzer for audio warning when water.
Water level control circuit using relays.
With your new circuit i can clearly see where to incorporate the two transistors to control the relay for switching power to pump and heater.
Joydeep kumar chakraborty.
To explain how it operates the images below will show a ladder diagram left side figure and a pictorial diagram right side figure for a visual concept of what happens with.
It does this by turning on and off a water pump depending on the status of the sensors.
My question was in case a level switch got a problem i could change the control building the circuit of your design.
How the operation of relay based on off control system is.
By means of a relay employed to drive a water pump this circuit provides automatic level control of a water reservoir or well.
The shorter steel rod is the water high sensor whereas the longer is the water low sensor.
The circuit automatically switches on the pump when water is low in the tank and switches the pump off when water reaches a predetermined mark.
This is the circuit to determine the level of water in the process tank using relay based on off control.
This is a circuit for water level controller is based on transistors and relays.
Liquid level control relays detect control levels of conductive liquids such as fresh water seawater sewage coffee see table below for other liquids.
This design is only a basic portion of my own marketed product having unsafe voltage cutoff dry run cut off and led alarm indications and overall protection.
They provide a low voltage signal typically 5vdc pulsed to prevent electroplating issues to a probe or probes and a common connection on the tank.
Water reservoir automatic level control simple circuitry 12v supply.
With a nc normally closed or a no normally open contacts of the relay rl we can handle any type of starter.
This simple water level controller circuit is useful to control the water level in a tank.
Anyway the given concept includes automatic water level control and high low voltage cut off.