Flow Level Pressure Pressure Sensor Production Facilities Expanded


Following recent investment in their Torque and Load cell manufacturing facility, Scan-Sense (Norway) now unveils further expansion of its pressure sensor production and calibration department. With fully automatic pressure and temperature cycling, hydraulic testing and calibration, the pressure production department has gained a 175% capacity increase. Temperature Chambers Data Acquisition Unit Pressure generators -40°C-200°C Max 2600 bar


Scan-Sense is a leading organization for the development, production and supply of load and pressure sensors and marine calibrators in the International offshore and marine market. Scan-Sense has over 20 years experience in the design, manufacture and service of load and pressure sensors. Their range of portable Temperature- and Pressure Calibrators and Load calibration kits will fulfill almost every need for field calibration.


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Range of Pressure and Temperature Switches Achieve SIL2


K-Tek (Netherlands) have announced that the company's Beta line of pressure and temperature switches have been certified for operation in SIL2 (Safety Integrity Level 2) environments.


Beta switches are the only complete range of switches in the industry to be certified to the exacting IEC 61508 safety standard. To obtain SIL2 certification, the products must be analyzed based on quantitative data and tests indicating the length of time between failures and expected performance in the field. This certification helps reduce risk at the process measurement level when implementing Safety Instrumented Systems (SIS) in process plant environments, such as offshore oil platforms, chemical plants, and refineries.


"Safety is a high priority for end users," stated Winston Landymore, Beta Product Manager at K-TEK. "SIL2 certification is not usually found in the pressure and temperature switch industry because of the difficulty in meeting the criteria. BETA is the only pressure switch company to provide a complete SIL2 pressure switch product offering. BETA switches are engineered for maximum over-range protection, wide rangeability, and narrow deadbands. They can be integrated with our SIL2 magnetostrictive transmitters, eliminating single mode failure and increasing the safety integrity rating of the entire level system."


The Beta line of pressure and temperature switches features spring-loaded, self-aligning diaphragm/piston sensors. Limited piston travel transmits pressure at the diaphragm directly to the microswitch; there are no intervening linkages or mechanisms and full protection is provided against high over-range pressure. The switches are engineered for maximum over-range protection of up to 5800 psi / 399 bar. The spring-loaded piston also provides excellent resistance against shock and vibration and makes changing ranges as easy as changing the spring. K-Tek's Beta W-Series include a separate adjustment compartment that allows for easy field calibration.


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Level Detection Based on Frequency Sweep Technology


Flow Measurement up to 400 °C. Non-Intrusive.


No clogging, no risk of leaks, no pressure loss.


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Explosion-Proof Differential Pressure Transmitter


The Series 3100 Smart Pressure Transmitter from ITM Instruments (Canada) is a microprocessor-based high performance transmitter, which has flexible pressure calibration, push button configuration and prog- rammable using HART®


Communication. The Series 3100


is capable of being configured for differential pressure or level applications with the zero and span buttons. A field calibrator is not required for configuration.


The transmitter software compensates for thermal effects, improving performance. EEPROM stores conf - iguration settings and stores sensor correction coefficients in the event of shutdowns or power loss. The Series 3100 is FM approved for use in hazardous (classified) locations. The 100:1 rangeability allows the smart transmitter to be configured to fit any application such as flow measurement, level monitoring, filter or pump differential pressure or critical process monitoring.


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With the FlexLevel Switch 4101 Baumer (Germany) presents a new sensor which is based on frequency sweep technology. The device detects the level of liquids, viscous fluids and dry media. Due to the smooth, very small sensor head even adhesive media don’t stick whereby the adhesion error is very low. The level switch is suitable for overfill protection, low level detection, dry running protection and phase separation. It can be installed in any position and even at points difficult to access. The FlexLevel Switch 4101 can be easily configured on PC via the Flex - Programmer 9701.


A frequency is swept by the transmitter and becomes subject to a phase shift depending on the media. When in contact with the media having a different dielectric constant (DC) outside the selected DC range, an electronic switch is triggered.


The high sensitivity over a large sensing range from DC 1.5 up to more than 100 allows the level detection of all kinds of powders, granulates and liquids. Even difficult substances like polyamide granulate or paper can be detected reliably. Thanks to the teach-in function, the switching point is adjustable even for sticky media.


Compared to other measuring methods, this technology has important advantages: It has no vibrating parts, is soundless and not sensitive to changes based on conductivity. Even with the formation of foam, the level switch only reacts after the actual DC-value has been reached.


Hence, the FlexLevel Switch 4101 is a cost-efficient and reliable alternative for applications which previously used vibration forks, conductive ultrasonic or optical sensors.


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Flow Measurement up to 400 °C. Non-Intrusive.


Simple, fl exible installation from the outside. At any time.


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Relief Valve Leak Detection System Reduces Risks and Costs


Pressure Relief Valves (PRVs) are used extensively in oil refineries, chemical plants, pipelines, power plants, and other industrial applications as part of pressure-relieving systems to protect piping, boilers, vessels, and other pressurized assets from dangerous over-pressure conditions.


To help users ensure that these systems are supplied


in accordance with recognised good engineering practices, a number of industry-specific standards exist. For example, American Petroleum Institute standards API 521 (ISO 23251), API 526, and RP 520 all deal specifically with PRVs and pressure-relieving systems as used in the petroleum industries.


PRVs are particularly susceptible to leaks and the consequences of such leaks can be serious. These leaks can lead to dangerous operating conditions, increasing the risk to plant and personnel, cause damage to the environment, which in turn results in regulatory fines/penalties, with all the negative impact to the public image/reputation of the company itself. In addition leaks will reduce process efficiency and profitability and cause a loss of raw, intermediate, or finished materials.


While most companies expend considerable


resources to detect and mitigate leaks, usually in the form of routine inspection or observation regimens, current approaches have not proven entirely effective, and PRV leaks remain a significant challenge for industry.


Additionally, PRVs are frequently subjected to unnecessary maintenance. This occurs when a leak cannot be confirmed, but to err on the side of caution, preventive repairs, replacements, or overhauls are carried out “just in case.” This can drive the relative maintenance costs for PRVs very high.


Cost-effective and reliable online technology is now available to monitor critical PRVs for the presence of leaks. An online approach means that leaks are caught within minutes, incident severity (and associated consequences) is minimized, and costly routine inspection regimens are eliminated.


GE’s (USA) PRV Leak Detection System uses the Bently Nevada Trendmaster™ Pro architecture to gather periodic, online temperature and acoustic measurements and automatically analyze them in System 1™ software.


By using both temperature and acoustic measurements in complementary fashion, more reliable detection is available than when using either technology alone. These measurements are then processed through a special RulePak in System 1 software’s decision support engine. This RulePak contains sophisticated, embedded knowledge of PRV leak behavior, automatically detecting the presence of a leak.


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June/July 2010


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