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UV sensor shrinks size, maintains performance

Posted: 26 Apr 2006 ?? ?Print Version ?Bookmark and Share

Keywords:UVX-300G-REM? ultraviolet? luminescence sensor? sensor? UV?

EMX Industries Inc. said its remote ultraviolet (UV) luminescence sensor is 87 percent smaller than previous models but still maintains long range, high resolution and ease of use. It also extends the useful operating distance of UV sensors to 350mm, which is three to six times the distance of competing sensors, said the company.

Suitable for detecting adhesives applied in assembly, manufacturing, and packaging operations, the UVX-300G-REM has a remote sensing head that is easily mounted and measures 0.7-by-0.8-by-1.2 inches. The sensor uses patented technology to provide high sensitivity and long-range target detection that is said to be more reliable than many other vision systems costing up to ten times as much.

As part of a feedback control loop, the UVX-300G-REM can precisely measure the amount of applied adhesive, check for the presence of a material or part, and alert operators to problems such as misapplication, omitted items and improper equipment operation. The 87 percent size reduction, achieved via remote sensing, allows the sensor head to be positioned near rollers and spray nozzles, while its long detection range allows positioning away from debris contamination and physical damage.

The output of the remote sensor head is connected to a control unit through a one-meter cable. The sensor control unit provides a visual readout and sends signals (0-5V analog and discrete on/off) to a master controller through a separate cable. Its high sensitivity allows it to detect subtle differences in assemblies and packages, and is adjustable for different materials.

The control unit provides five user-selectable gain settings and relative reflection readings from 0 to 99, which is said to be twice the reading range of earlier general-purpose UV sensors. It allows adjustable light projection (370nm UV LED; min. life of 100,000 hours) and its high resolution delivers pinhead accuracy. Users can set the detection threshold, but a lockout feature prevents unauthorized adjustments.

The control unit also features an IP67-rated housing suitable for a wide range of operating environments, along with short-circuit and overload/reverse polarity protection. Connections are made via a standard M12 5-pin connector.

In addition, the feedback response frequency of 6kHz is at least three times faster than any other UV luminescence sensor, according to the company. It also features a numerical readout of the detection threshold and relative reflection intensity of each reading. This makes it easy for an operator to tune the sensor.

Currently available, the EMX UVX-300G-REM luminescence sensor is priced at approximately $1,000. Optional accessories include mounting brackets and a 5m control unit cable with a M12 connector.

- Gina Roos

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