Processing Magazine

New Lightweight Submersible Level Transmitter

January 19, 2010
The low-cost submersible level transmitter is designed specifically to provide the convenience of direct submergence in many types of liquids for quick, accurate and reliable level measurement. The simple design of the unit ensures long-lasting service with virtually no maintenance. Transmitters indicate liquid level by continuously measuring hydrostatic pressure via its isolated sensing element—an ion implanted silicon semiconductor chip with integral Wheatstone Bridge circuit. Once the sensor measures the pressure, the data is transmitted by a 4 to 20 mA output signal. This design provides for excellent linearity and repeatability, low hysteresis and long-term stability at an economical price. The unit is easy-to-install. Simply lower the transducer into a vessel or well. All of its electronics are mounted in a submersible 316 stainless steel housing. A special cable is factory installed and sealed to insure liquid tight performance. The customer connection end of the cable is sealed and a desiccant package is installed to limit the amount of moisture allowed to enter the barometric reference of the sensor. Other options are also available.