The laser diode specialists

News Release from: Omron Electronics
Subject: EE-SX1131
Edited by the Electronicstalk Editorial Team on 14 January 2004

Photo-interrupter takes position

A new dual-channel photo-interrupter provides a straightforward solution for detecting the speed and direction of rotation in mouse and tracker balls and a host of encoder applications.

Note: A free brochure or catalogue is available from Omron Electronics on the products in this news release. Click here to request a copy.

A new dual-channel photo-interrupter from Omron provides a straightforward solution for detecting the speed and direction of rotation in mouse and tracker balls and a host of encoder applications ranging from fruit machines to industrial equipment. Omron has also released lead-free versions of its standard photo-interrupters, widely used in automotive controls, paper detection in office equipment, HVAC and other applications. Designated the Omron EE-SX1131, the new dual-channel transmissive-type photo-interrupter from Omron features two transistor outputs, allowing speed and direction to be monitored by looking at the time interval between responses on the two channels (differential position sensing).

This ultracompact device is just 5 x 4 x 4mm, with a 2mm wide slot, and offers a high resolution of 0.24mm thanks to 0.3mm apertures with 0.8mm spacing.

At the same time, Omron has announced new lead-free versions of its popular through-hole photo-interrupters.

The new Omron EE-SX1139 and EE-SX4139 are footprint and functionally compatible replacements of earlier models and feature a 2mm wide slot in a package just 4.3mm wide.

The EE-SX4139 features a photo-IC output, for an ultra-fast response, offering a switching rate of at least 3kHz.

The EE-SX1139 offers a conventional, transistor output.

Omron's EE-SX1107 and 1108 surface mount photo-interrupters are already lead-free, and will continue to be available.

These devices feature 3.4 and 5mm widths, respectively, and 1mm slots.

High resolution is achieved using 0.15 and 0.3mm apertures.

A surface mount version with photo-IC (digital) output including a Schmitt-trigger function is also available, designated EE-SX4134.

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