Log in to use our free company, program and sector update tracker feature.

Front page

Kistler sensors help NPL develop dynamic pressure sensor calibration facility

Methods and standards for static pressure calibration are well established, but no accepted method or standard exists for dynamic pressure calibration. There is growing demand within industry to ensure pressure sensors faithfully record the changes in pressure that occur during combustion or explosion events. This demand is coupled with the quality imperative within industry. The National Physical Laboratory (NPL) is working on a dynamic pressure sensor calibration method, based on shock tube techniques, which NPL hopes will be adopted as an ISO standard. The methodology uses a shock tube, in which a bursting disc separates two sections, and an increasing pressure in one section initiates failure of the disc, creating a pressure shock wave in the other section. This shock wave is used to calibrate the sensor under test mounted in the section's end wall. The shock tube performance has been validated using a Kistler Instruments Type 603B miniature piezoelectric pressure sensor with acceleration compensation, designed specifically for measuring pressure fluctuations of high frequency and short rise time, and the Type 5015 single channel laboratory charge amplifier with a wide measuring range.

The majority of pressure sensors used in industrial applications to make dynamic measurements are calibrated only for static measurements, even though it is widely recognised that the behaviour of sensors will deviate progressively from their static characteristics as the frequency is increased. The new facility provides a calibration process that extends the measurement traceability of pressure sensors into the dynamic regime by exposing them to extremely fast pressure steps of up to 1.4 MPa. This facility is particularly suited for characterising sensors used in applications such as gas turbine and internal combustion engine development.

The pressure steps are created in a shock tube using different combinations of gas, bursting disc thickness, and initial static pressure in the downstream section. The theoretical rise time for the pressure steps is in the region of a few nanoseconds making the frequency content of the pressure rise sufficient for practically all industrial applications. The calibration process extends the measurement traceability of the sensor into the dynamic regime by quantifying its resonant frequency and its amplitude and phase response over a wide range of frequencies. The SI traceability of the calibration is derived from the starting pressure and temperature, gas species, and shock wave velocity measurements. In addition to the standard tests, NPL is able to investigate the dynamic characteristics of entire measurement systems.

Press release issued by Kistler Instruments Limited on November 7, 2014


 Contact details from our directory:
Kistler Instruments Limited Pressure Detectors, Sensors/Transducers, Transducers, Angular Sensors, Force Sensors, Electromechanical Actuators, Process Control Systems, Accelerometers


 Related directory sectors:
Sensors, Transducers & Detectors

Enhanced listings:

Reduce the time spent on current projects by using ESDU – engineering data and software that have been approved and endorsed by professional institutions.

General Plastics Manufacturing Co.
General Plastics has been supplying OEMs, Tier 1 and Tier 2 companies with flame-retardant foam core materials and custom flexible foam molded parts for aircraft flight decks and interior cabins for over 50 years.

Quintus Technologies
Quintus Technologies is a global leading provider of high pressure fluid cell presses and hydroform deep-draw presses for sheet metal forming

Belden Universal
Specialty universal joints and drive shafts, designed to satisfy even the most rigorous operating criteria. Belden Universal is AS9100C certified.

Samuel, Son & Co.
Looking for a quality metals supplier? Samuel can provide Aircraft Quality metals that meet Commercial and Military specifications

See our advertising tariff.


Monthly page limit exceeded. Please buy a subscription.

© Copyright of Airframer Limited, operated under licence by Stansted News Limited 2016. Terms & Conditions of reading.