The first step in selecting a pressure transmitter for liquid level measurement is to determine whether to submerge or mount the sensor externally.
Mounting a liquid level pressure transmitter externally is nearly always preferable because a screw in pressure transmitter is normally cheaper than one that is immersed, and is easier to service.
If you are mounting a liquid level pressure transmitter externally, care should be taken not to install it onto pipes where there is likely to be a high flow of liquid or pump pressures since these may interfere with the hydrostatic pressure reading.
Featured screw-in liquid level pressure transmitter products
Canola oil tank hygienic level sensor & indicator with high temperature protection - Instrument for measuring the level of a used Canola oil tank, and tolerate temperatures of up to 190 degrees Celsius.
High temperature ethanol boiler level measurement - Looking for a precise level sensor for boiling ethanol? Discover how a capacitive ceramic transmitter with EPDM seals provides millimeter accuracy for low-pressure boiler applications.
Waterproof pressure transmitters are used when it is not possible to provide access from the outside at the point you would like to measure the liquid level. For example there is no way to fit a pressure transmitter to the outside of a buried water storage tank without excavating the ground around it, so a waterproof pressure transmitter is the most economical solution.
Normally a manufacturer will clearly describe in the specification whether a pressure transmitter has an immersion option. In Europe there is a system for rating the level of water tightness which is the Ingress Protection Rating or more commonly known as the IP Rating. For immersion the pressure transmitter should be sealed to a rating of IP68. If it is not clearly marked in the literature you should clarify with the manufacturer for what depth and duration it can be submerged.
Featured waterproof liquid level pressure transmitter products
Cost-effective hydrostatic sensor for OEM diesel fuel management systems up to 2 metres - The IMTG is specifically designed for large quantity OEM customers which manufacture and install content management systems for fuel storage tanks.
Sewage level transmitter for submerging in low depths to 5 psi - Submersible IP68 level transmitter for sewage applications. 5 psi g range, 4-20mA output, FKM seals, and FEP cable. Ideal for level monitoring in harsh environments.
Related Help Guides
- Determining the hydrostatic pressure range for a tank level sensor
- Measuring liquid level in a sealed tank with a hydrostatic pressure sensor
- Difference between vented and non-vented water level measurement
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