tf50-p float transfer is used to prove go with the flow in liquid lines the use of water, ethylene glycol answers, or different beverages well suited with brass and phosphor bronze parts. The spdt touch switch is activated via the drift of liquid through the pipes. The set factor is adjustable. Any other instance on esp8266 12/12e as clever metering the use of liquid/water flow sensor. ?water go with the flow sensor is able to measuring flows in pipes from zero.15 to 60 liters in keeping with minute, suitable for measuring water consumption or detecting pipe leakage and tracking agricultural irrigation. It is really useful to fit a 375v bi-directional transil across the relay coil terminals, if the manipulate voltage is 240v ac. A 1a silicon diode (in4006) ought to be connected across the coil terminals, if the control voltage is dc (see diagram under). Those measures are to avoid again emf, induced over voltage transients, which can reason damage to the reedswitch contacts.
The lowest switch may be closed provided the liquid is above that transfer point. The liquid rises till the top waft switch closes and energises the relay.? one set of relay contacts connects the pump to the supply and the opposite maintains the relay on-state, even as the level falls toward the bottom transfer.