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Pressure measurement


measurement for rapidly changing requirements such as those found in surface pressure measurement and process control applications. Eight HSC Series pressure sensors, with


ranges down to ±160 Pa full scale, are mounted in a row on an interchangeable, modular card. The cards, which contain their own on-board memory and are factory- loaded with calibration data, are then mounted in banks of up to eight in an enclosure. The scanner system also includes sensors for temperature, density and humidity corrections, as well as a remote fluid temperature sensor. “What we provide is basically a convenient


carrying case for the HSC sensors. We can provide this system in a variety of enclosures, or as an OEM unit,” says Joe Braitch, CEO, Surrey Sensors Ltd. “The


TruStability sensor pricing, combined with the Surrey software/microcontroller, allows us to offer these scanners at a price that no one else can approach. In fact, the next- best competitor solution costs more than $30,000, three times more than our Scanner System.”


Digital seven-hole probe system


This system uses pressure as a proxy to measure air velocity (speed and direction) in a very small and accurate package for use in wind-tunnel testing, motorspor t, and UAVs. Each of the seven holes located in the


tip of the cylindrical probe’s sting is connected to its own RSC Series sensor physically located in the probe body. The RSC Series provides differential measurement directly against local static pressure around


the sting’s tip. Other sensors located in the probe body provide additional measurement parameters such as humidity and temperature. Another seven hole probes are not new, they can be very cumbersome. “In the recent past, the best you could manage was a large array of sensors, with wires, hoses and a substantial external infrastructure. These worked well, but were very expensive to buy and difficult to build,” Birch relates. “More recently, we have developed this sort of system into a compact, self-contained unit, and the RSC Series digital pressure sensors have been a big part of our success. Our probes are now demonstrably the most powerful on the market, as well as the most sensitive and arguably the most advanced in terms of capability.”


Honeywell sensing.honeywell.com


Instrumentation Monthly January 2019


33


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