Flame monitor SIL 3 approved

May 2010 Pressure Measurement & Control

IEC 61508 defines the standard for safety instrumented systems (SIS) and categorises them into safety integrity levels (SIL 1 to SIL 4). Afriso has evaluated all series DMU piezo-resistive pressure transducers relevant for the process industry according to IEC 61508 (basic) and IEC 61511 (process industry).

Two different measuring principles are used to monitor relative and absolute pressure. The robust, ceramic thick-film sensors of series DMU 01 allow for pressure measurement of almost all gases and liquids that are not aggressive to the FKM seal used in the pressure channel. This aluminium oxide sensor is also available in a flush mounting version for abrasive media such as bulk solids. The oil-immersed silicon measuring cells of series DMU 03 and DMU 04 are adapted without seals to the front-mounting process connections. The DMU 08 transducer with the same measuring principle is used for hydrostatic level measurement.

All DMU pressure transducers were rated SIL 2. As a result of the evaluation, these sensor systems can be used in potentially explosive areas with measuring ranges from 40 mbar to 600 bar and vacuum. The new SIL pressure transducers are used, for example, in biotechnology, chemical and gas applications, plant engineering, the semiconductor industry and process technology applications.

Further reading:

VEGA handles the pressures of water treatment systems
VEGA Controls SA Pressure Measurement & Control
A water treatment system for a major metropolitan area in the Midwestern United States demands careful monitoring and management of processes across its sprawling network. Choosing VEGA for its process automation needs meant more than just obtaining precise and reliable pressure sensors.

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Pressure sensors for hydrogen applications
Instrotech Pressure Measurement & Control
Keller manufactures isolated piezoresistive pressure sensors. The great advantage of the piezoresistive measuring principle is its high stability.

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Sensor technology for cartonboard machine for paper and packaging
VEGA Controls SA Pressure Measurement & Control
Paper and packaging specialist, LEIPA undertook a comprehensive modernisation project, combining three stock preparation lines into one, and making investments in new plant components and extensive automation technology. Because of the good experiences the company had already had with VEGA sensors, those responsible for planning and maintenance decided in favour of the VEGABAR 82 pressure transmitter as the standard instrument for level and pressure measurement in the new stock preparation system.

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Pressure measurement without risk of contamination
WIKA Instruments Pressure Measurement & Control
Injectables are among the most sensitive products in the pharmaceutical industry. Sterility is essential during production. For this reason, a manufacturer of biopharmaceuticals decided to implement the pressure monitoring of its processes with hygienic instruments from WIKA.

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Pressure monitoring for oil and water tempering machines
Instrotech Pressure Measurement & Control
Temperature plays a significant role in many manufacturing processes. In such cases, a tempering machine is used to maintain the manufacturing process at the desired temperature. Keller supplied PR-21Y piezoresistive pressure transmitters to a client specialising in developing and producing oil and water tempering machines.

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How to look after your pressure gauge
SA Gauge Editor's Choice Pressure Measurement & Control
Pressure and temperature gauges are very widely used on process plants. Specialising in the design and manufacture of pressure and temperature measuring instruments, SA Gauge believes that all process and ambient factors should be considered when selecting and installing pressure measuring devices. The company recommends that the following guidelines on selection and calibration be followed in order to prevent gauge failure.

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Process measurement solution for Copper Belt’s Kansanshi Mine
VEGA Controls SA Pressure Measurement & Control
Kansanshi Mine faced measurement challenges in its gland water tanks, slurry, and raw materials in the stockpiles and crusher bins. VEGA was able to offer a suitable solution to resolve these challenges.

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Pressure and level switches for food production
VEGA Controls SA Pressure Measurement & Control
New compact measuring instruments from VEGA prove that automation in food production can be very simple and economical without compromising on hygiene or safety.

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Safe pressure measurement in chlorine production
WIKA Instruments Pressure Measurement & Control
Pressure measurement plays a central role in chlorine production, which is a safety-critical process.

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Interference-resistant pressure transmitters
Instrotech Pressure Measurement & Control
Instrotech offers a pressure transmitter from Keller for temperature compensation and protection from electromagnetic fields (EMC) in the recently approved 21Y Series.

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