Product category:
Monitoring and sensor equipment and systems
News Release from: SensorsOne | Subject: PD33X
Edited by the Manufacturingtalk Editorial
Team on 09 October 2006
Differential pressure measurement
Compact transducer measures differential pressure with high digital accuracy
The PD33X high precision differential pressure transducer can measure with an accuracy of +/-0.15% full scale over a temperature range of -10 to +80C with the analogue signal output and +/-0.1% with the RS485 digital output signal The small size and low mass of the PD33X differential pressure sensor compared with more conventional process dp cells allows it to be used in applications where there is limited space and no convenient mounting point
This article was originally published on Manufacturingtalk on 9 Oct 2006 at 8.00am (UK)
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High precision differential pressure transducer
The PD33X high precision differential pressure transducer can measure with an accuracy of +/-0.15% full scale over a temperature range of -10 to +80C.
High precision differential pressure transducer
The PD33X high precision differential pressure transducer can measure with an accuracy of +/-0.15% full scale over a temperature range of -10 to +80C.
The PD33X is best suited for medium differential pressure applications for flow or filter condition monitoring from 0.2 Bar up to 50 Bar differential.
The standard maximum static line pressure is 200 Bar but higher static line pressures can be specified up to 600 bar if needed.
It is important to note that due to the small size construction there is no mechanical stops built into the design to prevent unintentional high overload pressures being applied to one side only.
Further reading
Automatic zero for pressure transmitters
Sensorsone is launching the new digital autozero and span option for the Gefran TK Industrial Pressure Transmitter and the TPSA Precision Pressure Transmitter.
Low differential pressure transducer, transmitter
Sensorsone is adding the Ashdown Control DRS Low Differential Pressure Transducer and Transmitter for use with Wet and Dirty Gases to its pressure sensor range.
If you need high overload protection on one side, the PD39X or DRS differential pressure transmitters would be more appropriate.
The sensing technology used in the PD33X is an all stainless steel 316L oil filled semiconductor strain gauge capsule which has a good over-pressure rating in the positive direction of two times.
Since the accuracy of this digital differential pressure transmitter is so high it is possible to trade some of this accuracy for higher over-pressure by selecting a higher base pressure range and down-ranging the electronics to the desired pressure scaling.
Inside the electronics housing of this high accuracy dp sensor is a microprocessor with an integrated 16 bit A to D convertor.
A 0-10 volt amplified voltage output or a 4-20mA current loop output signal can be chosen and each has the RS485 communications interface for configuring the pressure sensor or supplying a digital output signal.
The high accuracy over a wide temperature range is achieved by mapping the differential pressure readings of each transducer over the compensated temperature range during manufacture.
The results of the mapping are mathematically modelled to produce polynomial compensation coefficients which are then stored in the differential sensors non-volatile EEPROM memory.
For hazardous area environments the ATEX approved intrinsically safe PD33X Ei can be used with an appropriate IS zone barrier.
If the application calls for a small and lightweight differential pressure transducer with high accuracy the PD33X is certainly worth further investigation.
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