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Density transmitters 290 Series DENSTAR
Key
Benefits
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| The PSM Denstar 290
Series insertion transmitters measure density as a function of
differential pressure. Each unit has two pressure
sensitive diaphragms, each of which are located at a
known elevation in the tank. Under normal operation both
diaphragms will be submerged, and since the distance
between them is fixed, any variation in the pressure
differential between them must be a function of the
liquid density.
Within the sensor construction the diaphragms are hydraulically linked, the lower diaphragm is "rated" to suit the density span whilst the upper is compliant and provides a pressure transfer, via the hydraulic fill, to the rear of the rated diaphragm. Actual displacement of the lower diaphragm is measured using the proven LVDT principle. An amplifier module receives the LVDT’s output signal and conditions it to provide a 4 to 20 mA output over the required span. For convenience this amplifier may be sited up to 100 Metres away from the sensor. PSM’s unrivalled experience in the design and application of pressure sensitive diaphragms and a versatile approach to unit construction, ensures optimum performance on all applications. Previous successes include drilling mud / drilling fluid storage vessels where mechanical protection and rugged construction are essential. Each density transmitter is manufactured as standard as completely submersible with a 3/4" threaded adaptor suitable for pole suspension or clamping in place. The PSM Denstar density transmitter has been successfully applied in many drilling fluid/mud applications worldwide due to it's robust construction and ease of installation.
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