These sensors are used in applications where continuous indication is needed. CLM’s come in 1/4″ resolution and are constructed out of 316 Stainless Steel, Stainless Steel & Buna or Polypropylene. The sensor is a 3-wire potentiometer and requires a signal conditioner or digital panel meter for is a 4-20ma output is needed. The CLM is a sensible and economical choice when multi-level switches just will not do. Standard units available up to 8 feet.
A series of reed switches and resistors are positioned on a circuit board, which is epoxied inside the stem. A regulated voltage is put across the circuit, which is connected to either the signal conditioner or digital panel meter. The liquid level drives a float containing a magnet past the reed switches closing them in a repeatable pattern limiting the voltage across the circuit as the level rises.