Abstract:
With the availability of mechanical floats, floats with switches, conducting liquid probes and many other complex sensor, here is presented a novel sensor having non-contact sensing technique to sense liquid level. This sensor consists of a magnetic float guiding over a p.v.c pipe. Inside the p.v.c pipe are placed reed switches to monitor the low and high level of the tank. With the vide variations of tank dimensions this sensor can be conveniently designed and easily fabricated. The non-contact principle avoids use of high voltages, adds safety, increases the life of sensor and over comes the maintenance problem faced by the other sensors.

Keywords: non-contact, magnetic float, p.v.c pipe