Sensor Technology
Liquid Level Transmitter Supports Foundation Fieldbus MTS (Germany) has developed a new output for its line of magnetostrictive Level Plus®
11 liquid level sensors. Foundation Fieldbus will be the third protocol offered by the MG digital level transmitter, which also includes current production of Modbus and the ASCII based proprietary DDA protocols.
The Model MG satisfies the demand for a digital communication interface in the liquid-level marketplace for vessels from 508 mm to 22,000 mm. It offers maintenance free liquid level measurement for automatic tank gauging without any recalibration. Featuring 3-in-1 measurement of the product level, interface level, and the average temperature of the liquid from up to 12 temperature points it utilises a single process opening, eliminating the need for separate level and temperature transmitters. Designed for inventory control, the model MG offers a resolution of 0,025 mm at maximum length and can also provide volume measurement from a 100-point strap table that the user loads into the transmitter.
The new Foundation Fieldbus protocol will make the Model MG transmitters compatible with an even wider variety of control systems, expanding the company's offerings to
additional customers with pharmaceutical, chemical, biotech and food applications. Now they can combine the superior control capabilities of the protocol with the transmitters' superior repeatability and reliability for an extremely efficient process.
Reader Reply Card no 32 Gas Sensor Sockets for High Reliability and Lower Cost
Electrochemical cells, pellister, IR cells and solid-state sensors are prone to damage because of shock and vibration. Andon (USA) became aware of the gas instrument industry’s need for a solution to this problem, as well as the need for higher liability and lower cost.
The old state-of-the-art test jacks were designed for single meter probes and not for multi-pin sockets. Andon developed the unique SENSTAC™ Sensor Contacts made in-house in a variety of sizes with high temperature insulation and gold plated terminals and contacts to be RoHS compliant. Gas Sensor Sockets are available in standard thru-hole PCB footprints and in surface mount (SMD) to also accept the leaded sensor. This is especially important for reducing weight and space by eliminating one PCB and surface mounting components on both sides of one PCB.
The insulator holds all the terminal/contact assemblies for easy pick and place, without the labor-intensive cost of handling and soldering individual test jacks. The result is exact perpendicular and parallel terminal alignment to prevent stress on the delicate sensor leads and case. Customised pin layouts are also available with additional pins for a temperature sensor or memory
chips.The president of Andon Electronics, John O. Tate, developed the original multi-finger high precision socket contacts over 40-years ago for the Aerospace and Military high shock and vibration requirements. This contact design remains today the most reliable in-service design.
Reader Reply Card no 33
New Low-cost OEM Gas Sensors Feature Improved Communications
Edinburgh Instruments (UK) has a well-deserved reputation in the arena of infra-red gas sensing technology, with a track record spanning over 20 years. The company is continuing to build on this reputation with the introduction of its next-generation OEM sensor, named the Gascard NG.
Utilising established and proven technology from the existing Gascard range of instruments, the Gascard NG not only addresses existing customer requirements, being backward-compatible with the
current Gascard model, but it also provides for future extendibility and functionality through improved communications and configuration options.
The main highlights of the Gascard NG are: Backward-compatibility with the current generation of Gascard detectors; Automatic temperature and pressure correction via on-board sensors; On-board RS232 communication; TCP/IP communications protocol option; Field-replaceable IR source; Windows-compatible data logging software; Enhanced configuration options for future extendibility to incorporate additional gas detection technologies.
Initially released in CO2 ppm & low per cent volume configurations, the range has now been
extended to include all the different
measurement ranges for CO2 as well as the other target gases covered by the current Gascard model, such as CO and CH4.
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April/May 2010
AET
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