Gems scales down pressure sensor

Despite its size–as small as 25mm–Gems Sensors & Controls' 3100 series of thin film metal pressure transducers offer a long-term drift of 0.1% of full scale per year non-cumulative. This eliminates recalibration, which can be required every 6-12 months on other sensor types, taking up to 30 minutes per sensor. This saving in downtime and engineering resource can be significant when added to the cost of the unit. The all-welded construction also eliminates leakages which can occur on sensors which use o-ring seals, and means that the sensor itself is very robust, the manufacturer says.

Staff Writer September 14, 2007

The thin film gauges are deposited on to the diaphragm surface using sputtering techniques, which helps to eliminate drift and ensure repeatable performance. As a result, long-term stability is believed to be 3-4 times better than transducers that are based on traditional technology.

The 3100 covers a pressure range, from 10 bar to 2200 bar. Operating temperatures for the units can be as high as 135ºC. 3100 sensors are available with a choice of six electrical connections and nine pressure ports.

The thin film gauges are electrically isolated from the diaphragm surface by a layer of silicon dioxide. The unit is constructed with a single printed circuit board which also incorporates filtering and transient suppression components. This provides both a high level of RFI protection and resistance to voltage spikes.

www.gems-sensors.co.uk

Gems 3100 thin-film pressure sensor Gems 3100 thin-film pressure sensor

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