Product category:
Pressure measurement systems
News Release from: American Sensor Technologies | Subject: AST4200
Edited by the Processingtalk Editorial
Team on 28 April 2005
Panel-mountable pressure transducers
without leaks
The unique one-piece bulkhead design of the AST4200 panel-mounted pressure sensor allows mounting through the panel to keep hazardous media out of the control box
Pressure transducers form a critical function in today's closed-loop systems, providing data for safety, control and alarm functions encountered in typical industrial applications such as heating boilers, HVAC/R, gas correctors, compressors, test stands, fire suppression equipment and power generation These sensors measure a wide range of benign and corrosive media, with temperatures ranging from -70 to +300 degrees Fahrenheit
This article was originally published on Processingtalk on 19 Aug 2004 at 8.00am (UK)
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System integrators and panel builders traditionally relied on sensors mounted to bulkhead fittings in order to form of pressure connection for pressure measurements.
This meant that in a typical panel, the sensor was mounted inside to a panel-mounted bulkhead fitting and sealed by means of Teflon tape or face O-ring and requires an additional connection between the bulkhead fitting and the hose.
The seals between the sensor, bulkhead fitting, and the hose are critical and, if not formed correctly, can lead to leaks and eventual failure of the system, particularly in systems that handle water, steam, corrosive gases and liquids.
Further reading
High-accuracy solid state pressure switch
American Sensor Technologies has developed a superior quality, high-accuracy solid state pressure switch for the measurement of gases and liquids compatible with stainless steel
OEM pressure transducer with superior performance
A low-cost, high-quality OEM pressure sensor built to address applications with tight space restrictions and requirements for high accuracy, trouble-free operation and long life
Using panel-mount pressure sensors, such as American Sensor Technologies (AST) Model AST4200, this problem can be overcome, as these sensors were designed to provide a hermetic seal against the media without the use of adapters.
The unique one-piece bulkhead design of the AST4200 mounts through the panel to keep hazardous media out of the control box.
Secondly, the solid one-piece 17-4PH or 316L high strength stainless steel design is free of welds, internal O-rings or fluid-filled cavities, making it ideal for applications that require high proof and burst pressures.
The sensor requires a minimal mounting configuration that uses a standard panel punch.
A locknut is used to hold the sensor to the panel, and leaves room for a gasket to be used.
Two wrench flats on the nose of the sensor allow the user to tighten the external pressure tubing to the sensor without turning the part.
Units offer outputs of 10mV/V, 4-20 mA or 1-5V.
They provide long life and resistance to media corrosion as well as superb over range and burst protection.
In addition to utilising strain gauge technology, the AST4200 offers wetted material such as titanium and nickel alloys with its own-patented Krystal Bond technology to produce strain gauge sensors that yield a high output with low thermal errors.
The AST4200 pressure sensors provide gauge, sealed gauge or compound gauge pressure measurement in ranges up to 10,000 PSI.
Sensors are calibrated and temperature compensated to ensure stability over specified ranges.
Units offer accuracy of less than 0.5% BFSL at 25C (77F) and long-term stability of 0.25% full-scale output per annum.
Exhibiting excellent resistance to high vibration, shock and temperature extremes, and high levels of EMI/RFI filtrations, units are able to perform in a variety of demanding environments.
For additional information, please visit American Sensor Technologies website.
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