SENSORS: Providing medical electronics design engineers with a reflective device capable of an enhanced sensing range in space-constrained applications, TT electronics OPTEK Technology’s OPB733TR reflective object sensor is being deployed in a wide range of medical equipment. The reflective sensor measures just 0.300 x 0.160 inch with a PC board-mounted profile of just 0.114 inch and incorporates a lensed IR LED and phototransistor elements to collimate the light beam for enhanced resolution at a detection range from 0.4 inch (10mm) to 1.0 inch (25.4mm).
The OPB733TR sensor consists of an IR LED with typical peak emission wavelength of 890 nm, mounted alongside a NPN silicon phototransistor, which responds to light reflected by the object being sensed. The phototransistor output on-state collector current is 0.1 mA (100 mm) at ½ inch (12.7 mm) distance from the target and a 20 mA forward current and VCE of 5V. Rise and fall time for the phototransistor signal is typically 15 mS. The surface mount package is reflow solder compatible to 260C. The sensors are available in 16 mm tape on 7 inch diameter reels, 500 pieces per reel.
Typical pricing for the OPB733TR reflective object sensor is $1.32 each in quantities of 1k. Lead time, if stock is not available, is from six to eight weeks.
Visit TT electronics OPTEK Technology in booth #1649 at the MD&M West show in Anaheim, CA from Feb. 9-11.
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