One is based on static pressure measurement (LV36 series), ranging from 1m to 200m of water column, and the other is of capacitive technology (LV66 series) to measure fuel/oil level.
The LV36 is a widely used submersible liquid level sensor. In application the LV36 level sensor is submerged in liquid to measure the liquid level. It is fully made from 316L stainless steel (SS) and employs a piezoresistive pressure sensor of flush diaphragm for measuring static pressure created by the liquid. A 316L SS filter is installed in front of the flush diaphragm to prevent it from being damaged by gravel or covered by organic substances (e.g., weeds) in liquid medium. In addition, a 316L SS cap further encapsulates the flush diaphragm for complete protection.
The LV36 level sensor has been developed into several variants as listed below, which have some new functions:
- LV 37: This model assembles the LV36 sensor with a smart transmitter of HART protocol and a display, to allow remote signal communication and on-site zero and span adjustment.
- LV 39: In this model a unique electrical circuit is integrated to facilitate protection against overvoltage up to 2kV due to lightning weather.
- LV 38: This model combines a smart transmitter of display and HART protocol with a pressure sensor of flange mounting suitable for liquid tank application.
As mentioned in the first paragraph, model LV66 sensor is of capacitive technology to measure fuel/oil level ranging from 50mm to 1000mm. This model is specially developed for automotive industry where fuel/oil level in fuel tanks must be measured or controlled.
For more detailed information on those liquid level sensors, please refer to its datasheets of each model, respectively, on BCM SENSOR website.
