When submersed in liquid, the Level Monitor shall convert the pressure exerted by the liquid into a 4-20mA analog signal that shall represent liquid level. A vent tube in the Level Monitor cable shall transmit atmospheric pressure down the cable to the reference side of pressure sensor, to correct for changes in atmospheric conditions. A stainless steel diaphragm and silicone oil fill shall be provided to isolate and protect the pressure sensor from the liquid being measured.
The weight of the Level Monitor shall act to reduce its movement when placed in a moving liquid. The Level Monitor submersible transducer shall weigh a minimum of 5.5 pounds, excluding the cable. The cable shall contain a strength cord capable of providing support for its weight. In applications where strong currents are present, the 1/2" NPT fitting on top shall be used to mount the Level Monitor in a fixed position.
The Level Monitor submersible transducer shall contain a two stage surge suppressor circuit containing both MOV and TVS technology to provide high voltage transient protection for the transducer circuitry. The Level Monitor submersible transducer may also be used with MPE part number LM Surge, a din rail mountable external surge arrester. Part number LM Surge shall be used to provide additional protection for the 4-20 mA loop while taking only minimal space within the control panel.
The Level Monitor submersible transducer shall be used with the MPE Transducer Vent Bellows (MPE part number TVB1). The TVB1 part shall be connected to the end of the vent tube of the Level Monitor to prevent moisture from entering the vent tube.
The Level Monitor submersible transducer shall come standard with 40 feet of cable, and shall be able to be ordered with various lengths of cable. The Level Monitor submersible transducer shall be available in the pressures ranges 5, 10, or 15 psi (11.5, 23.1, or 34.6 Feet ). The part number for the Level Monitor submersible transducer shall be LM - (followed by the Pressure Range) - (followed by the cable length). For a 5 psi unit with 40 feet of cable, the part number shall be LM-5-40.