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KPSI Level & Pressure Transducers: Application NotesTank Level Measurement |
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Occasionally, one finds a high pressure line running through the bottom of a tank filled with liquid. In such instances, we recommend a submersible pressure transducer with a threaded pressure port (e.g., Series 720 with a 1/4" male NPT pressure cap). Submersible installations require suspension of the cable via one of 2 cable anchoring schemes. The first is via a wire cable hanger in an open top configuration. The cable hanger slides onto the cable from the bare-wire end. It can be positioned anywhere on the cable by pushing the ends of the hanger together. Second, a compression fitting is used in a closed top configuration. We recommend only those fittings that utilize a plastic or rubber female, no metal. Also the installer should avoid over-tightening, which can result in a pinched vent tube. We supply, free of charge, a moisture and vapor trap with each submersible pressure transducer to ensure reliable operation and long life. This device protects sensitive electronic components from mildew, corrosion, rust and prevents the formation of a liquid column in the vent tube. Any such column directly affects calibration. This trap connects to the existing cable vent tube via a user-installable pin connection. Two common reference connections schemes are presented below.
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