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DDS High Over-Pressure Differential Pressure Sensor

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DDS High Over-Pressure Differential Pressure Sensor

Differential pressure transmitter with high over-load capability for measuring low differential pressures from 8mb up to 6 bar differential.

Contents

  • Product Parameters
  • Product Description
  • Product Help
    • End flanges
    • Filtering jump out
  • Related Documents
    • Specification data sheet

Product Parameters

  • Pressure Ranges: from 40 mb up to 6 bar differential
  • Overpressure: 100 bar >=400 mbar range on either port, 50 bar >=160 mbar range, 35 bar >= 40 mbar range
  • Line Pressure: 100 bar max
  • Accuracy: ±0.25% FS
  • Output Signal: Fully configurable 4 to 20 mA current or amplified voltage output available
  • Electrical Connection: Large DIN 43650 plug & socket, IP65 protection rating
  • Pressure Connection: 1/4 BSP female
  • Media Compatibility: All stainless steel construction with Nitrile or Viton O ring seals suitable for use with liquids or gases
  • Special Features: Rangeable turndown of 5 to 1 for each base range range, bleed screws for venting pressure ports
  • Special Options: Non-linear output signals, square root, 3/2 and 5/2 type

Product Description

The DDS differential pressure transducer can be used with either non-condensing clean gases or low viscosity liquids & condensing dirty gases with the silicone oil filled option.

The digital electronics can easily be configured to set-up a turndown range of up to 5 to 1, compound range, elevated zero, square root output for flow measurement, customer specified non-linear output, filter jump out or different RC time constants.

The DDS dp cell is designed for use in process control, industrial & HVAC applications.

Product Help

End flanges

What is the purpose of the end flanges on the DDS differential pressure transmitter?

The DDS has a typical DP cell construction with two flanges either side bolted onto the DP cell with O rings sealing.

The stainless steel flanges have two 1/4 BSP female process connections for connecting to the differential pressure. Two vent plugs are also provided for purging air or flushing liquid through each side of the DP cell.

There are also 4 mounting holes either side for mounting the transmitter on a pipe or bracket. Due to the weight of the instrument it is not possible for the device to be mounted solely on the process connections.

Since the flanges are bolted to the DP cell, they can be removed to facilitate cleaning of the internal wetted parts or replacing the seals.

Filtering jump out

What is the purpose of the jump out options for the DDS differential pressure transmitter?

The Jump Out function automatically switches off the digital filtering to ensure a significant rapid change in process pressure is transmitted which would otherwise be damped or removed entirely from the output signal as an irrelevant process fluctuation.

The Jump out is activated if there is an instantaneous change of pressure greater than the pre-set % full scale jump out setting. The transmitter will then revert from the configured digital filter of between 1 and 5 seconds to the base analogue time constant of 0.4 seconds.

Related Documents

Specification data sheet

  • DDS pdf product data sheet

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