Damaged or cracked metal diaphragms are one of the most frequent causes of failure in pressure transmitters. The result is that the isolating diaphragm liquid, which serves as a transmission medium between the separating diaphragm and sensor element, leaks into the process. The fault may not even be noticed by the sensor electronics, since the product itself also exerts a measurable pressure on the sensor. The exact time of damage can therefore not always be determined.
The isolating diaphragm liquids used are generally subject to FDA regulations and are not harmful to health. For the plant operator, however, they represent a product quality risk. The implemented transmission oils do not mix well with the water-based pharmaceutical products – serious contamination is sometimes the result.
The pressure transmitters with ceramic-capacitive Certec measuring cell from Vega offer a solution for these quality and validation processes. The ceramic measuring cell works without transmission liquid and ideally satisfies all requirements of the pharmaceutical industry. The measuring cell is dry, self-monitoring and registers both damage to the diaphragm and moisture leaking into the sensor.
The diaphragm, which consists of sapphire ceramic, is 10 times harder than high-grade steel and easily resists abrasive media. The diaphragm and ceramic body are joined together with a glass solder, allowing constant product temperatures up to +150°C. The design is completed by a sophisticated sealing concept, depending on process requirements a double seal, or a hygienic form, can be implemented. High surface finish provides optimal cleaning and sanitation.
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.
Read more...VEGA takes the pressure out of water pressure measurement VEGA Controls SA
Editor's Choice
Water treatment systems in metropolitan areas require careful monitoring and management processes across widespread networks. However, process plants choosing VEGA for their process automation know that the company offers more than just precise and reliable pressure sensors and instrumentation.
Read more...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.
Read more...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.
Read more...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.
Read more...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.
Read more...Level measurement under extreme plant processing conditions VEGA Controls SA
Level Measurement & Control
Level measurement in LNG and LPG processes is about answering the simple question: “How much product is in the tank?” However, obtaining an exact value is not easy. The products are often under pressure, cryogenic, and highly explosive. Sensors from Vega have been operating successfully in all stages of the LNG/LPG process for many years.
Read more...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.
Read more...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.
Read more...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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