The rising action of the float can either close ie turn on a normally open circuit or it can open turn off a normally closed circuit. Reed switch contact detail.
Improve Pump Float Switch Reliability With A Relay Or Contactor
Float switch relay circuit. The float is attached to a hinge in such a way that it can move up and down depending upon the oil level in the buchholz relay container. Lets start with the most basic float switch. The alignment of mercury switch hence depends upon the position of the float. Here is a simple level switch circuit that switches on one relay and switches off another relay when the fluid level exceeds the set limitthis circuit is a modification of the simple water level indicator previously postedwhen the water level touches the probes positive supply is connected to the base of q1 through fluidthis makes transistor q1 onbase of q2 is connected to collector of q1 and base of q3 is connected to collector of q2as a result q1 will be on and q2 will be offso k2. The proposed water level controller circuit using a float switch is basically a semi automatic system where the pump is started manually by press of a button once the water level reaches the brim of the tank the operation is switched of automatically by means of a float switch. When the water level falls low enough to open the bottom float switch this circuit is interrupted and the pump shuts off.
Commonly used circuit symbol. The lower element consists of a baffle plate and mercury switch. From top single pole reed switch four pole reed switch and single pole reed relay. A two level float switch used in conjunction with a dual level control relay is all you need to regulate your pump or valve which will maintain the level in your tank drain a tank that is full or fill a tank that is low. A two wire single pole single throw float switch. One mercury switch is fixed on the float.
As the water level falls and the top float switch opens current continues to flow through the bottom float switch through the com and no pins and back to the relay coil keeping the relay energized and the pump on. We manufacture float switches out of all stainless steel stainless steel buna and plastics. How about a solid state relay to switch the contactorthink they only draw milliamps. We have a wide selection of standard products to choose from but we specialize in customizing sensors to. There are countless applications where tank level control is necessary. Yesterday at 636 pm 7 so just say a 32a contactor with a 230v ac coil uses about 7va 7230003a according to the data sheet for a shneider contactor voltage limits for coil are 08 to 11 x nominal therefore for stable operation the minimum return voltage to the coil should be 23008184v this is not a distribution or lighting circuit so volt drop is.
Gallery of Float Switch Relay Circuit
