OPTEK’s Miniature Reflective Object Sensor Employed In Infusion And Transfusion Pumps, Medicine Dispensing Equipment

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 with a PC board-mounted profile of just 0.114 and incorporates a lensed IR LED and phototransistor elements to collimate the light beam for enhanced resolution at a detection range from 0.4 (10mm) to 1.0 (25.4mm).

“With the enhanced sensing range and miniature size, the reflective object sensor is being used in tube-in-place and tube proximity hospital infusion pumps; with encoders for volumetric measurement in transfusion pumps; and as carousel/bin sensors for medicine dispensing equipment,” said Roland Chapa, vice president of optoelectronic integrated solutions for OPTEK Technology.

The OPB733TR sensor consists of an IR LED with typical peak emission wavelength of 890nm, mounted alongside a NPN silicon phototransistor, which responds to light reflected by the object being sensed. The phototransistor output on-state collector current is 0.1mA (100m) at 1/2 [12.7mm] distance from the target and a 20mA forward current and VCE of 5V. Rise and fall time for the phototransistor signal is typically 15S. The surface mount package is reflow solder compatible to 260C. The sensors are available in 16mm tape on 7 diameter reels, 500 pieces per reel.