Project MEMS - January 2009 - (Page 16) feature are ratiometric relative to the power-supply voltage. They have open-supply, open-ground, and broken-pressure-cell detection capability and inverse-polarity detection to ensure reliable system operation. New pressure sensors were also being shown by Sensortechnics. Called the HCE series (see Fig. 6), they offer precise pressure measurement from 10 mbar up to 10 bar, and perform digital signal conditioning for high-accuracy digital/analog outputs. SPI compliant, the devices can communicate directly with microcontrollers and microprocessors. The units use ASIC technology to achieve a Total Error Band (TEB) better than ±0.5% FSS, including all temperature effects. Special low-power, 3-V-supply versions suit battery-powered device applications, and miniature SMT and SIL housings save space on pc boards. Typical applications include medical devices, instrumentation, environmental controls, and HVAC. Kavlico, a business unit of Custom Sensors & Technologies (CST)/Schneider Electric, showed two pressure sensors for pressure measurements for wastewater treatment systems: the P350 and the P356. The sensors meet NSF/ANSI Standard 61 for water filtration and wastewater treatment requirements. Wastewater systems require all waste to be pumped from lift stations to the treatment facility, and the pumps, which work 24/7, require pressure sensors to monitor the pump line. The P350 can be used to notify personnel at the pumping stations of any irregularities (drops or rises in the pump pressure) that would be cause for alarm. The P356 pressure sensor can be used to monitor flow. Both sensors are often used as part of an early warning system for slow moving or stoppage of movement of Fig. 6. The ADiS16365 iMU position sensor makes possible precise electronic control of vehicles. Project Contents Viewpoint MeMS Solutions for Testing MEMS Devices on the Wafer Level Wireless Sensor Networks Have Arrived Fig. 7. The P356 low differential/ gage pressure sensor has a rugged brass housing for hostile environments. Choosing the Right Material for RF Packaging waste water within the pump line. The P350 measures pressures from 0-5 through 0-150 PSIA or PSIG. The P356 (see Fig. 7) is a low-differential/gage pressure sensor with rugged brass housing for hostile-environments measurements in 0.5 to 5 PSIG/ PSID ranges. Low-power-consumption devices, both sensors use a ceramic capacitive sense element, have a linear amplified output of 0.5 to 4.5 Vdc, operate from a 5-Vdc supply, and have a built-in MetriPack 150 electrical connector. Home Page Product Training Module Online Ordering Suppliers ShoP MeMS coMPonentS at digi-key Catalog 1 6 | P r o j E C T M E M S | vo L . 1 / N o . 1 http://www.sensortechnics.com http://ad.doubleclick.net/clk;210306059;32013581;o?http://www.digikey.com/ http://ad.doubleclick.net/clk;210306059;32013581;o?http://www.digikey.com/ http://ad.doubleclick.net/clk;210306136;32013581;k?http://digikey.com/PTM/PTMMaster.page?site=us&lang=en http://ad.doubleclick.net/clk;210306155;32013581;l?http://ordering.digikey.com/ordering/addpart.aspx?site=US&source=search http://ad.doubleclick.net/clk;210306414;32013581;j?http://digikey.com/Suppliers/SupplierIndex.page?site=us&lang=en http://ad.doubleclick.net/clk;210801500;32013581;f?http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&KeyWords=MEMS&x=0&y=0 http://ad.doubleclick.net/clk;210306629;32013581;r?http://dkc1.digikey.com/us/en/pdf/Current.html
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