Sensors & Transducers

Sensors for automatic doors

December 2000 Sensors & Transducers

Telco (distributed by Gail Norton Instrumentation) offers a good selection of high-performance infrared detection devices for automatic door applications. The devices are well suited to uses such as lift doors, automatic entrance doors for pedestrians and industrial doors for vehicles, etc.

The system comprises a single, or multibeam, transmitter and receiver unit, which are mounted opposite each other at the entrance to the door. If the beam between transmitter and receiver is interrupted, the doors will instantly re-open, without having to come into contact with persons or vehicles.

Multibeam system (left) and single beam system (right)
Multibeam system (left) and single beam system (right)

Systems are available as complete, self-contained arrangements, consisting of the transmitter receiver for direct control of the door - or as a remote system, where the transmitter and receiver are powered and monitored by separate systems. The distance between detectors can be as far as 40 m, depending on the choice of sensor, and the application. The systems are able to reject spurious light input as high as 100 000 lux, depending on the model.


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Wire-actuated encoder for crane arms and lifting platforms
Instrotech Sensors & Transducers
Siko has solved the challenges presented by such applications with the SG 30 and its very compact, yet robust, design.

Ultrasonic distance sensor
ASSTech Process Electronics + Instrumentation Sensors & Transducers
Wenglor’s new ultrasonic distance sensors combine low installation depth and easy integration of the sensor with tried and tested ultrasonic technology, setting new standards in terms of range and integration options.

Grist for the mill
Turck Banner Editor's Choice Sensors & Transducers
To meet the requirements of Swiss company Bühler with regard to its MHSA grain huller, Turck certified its contactless Li linear position sensor for use in the Ex area. Thanks to its contactless operating principle, the robust sensors are both maintenance-free and wear-free. They offer an impressive performance due to their optimum reproducibility, resolution and linearity over a large temperature range.

Ex-rated strain gauge transducer
Turck Banner Sensors & Transducers
Turck Banner's IMX12-SG for force measurement applications in hazardous areas achieves response times below 10 ms and can be used as a repeater or signal converter.

Concentration measurement with process sensors
Sensors & Transducers
To run chemical reactions in an optimal range and to control product quality, online concentration measurement is required. This ensures a fast intervention in case of concentration variation during ...

Sensors for pulp and paper applications
Gail Norton Instrumentation Sensors & Transducers
Some of the toughest challenges for sensors are found in the pulp and paper industry. Here, high temperatures and a contaminated environment make it difficult for optical sensors to operate accurately ...

Universal code reader for optimal reliability
Pepperl+Fuchs Sensors & Transducers
Camera-based code readers have already proven their worth in reading detailed data for automated processes, with the adaptability to suit many tasks.

Working hand in hand to meet automotive OEMs’ strict requirements
Turck Banner Sensors & Transducers System Integration & Control Systems Design
The LASE Group, producer of machines and assembly cells for the automotive industry, places trust in its close collaboration with Turck Multiprox.

2D vision sensor
ifm - South Africa Sensors & Transducers
Thanks to its integrated daylight filter, ifm’s new Dualis is highly resistant to extraneous light and boasts powerful algorithms to meet demanding requirements.

3D machine vision camera gives robots human eyesight
SICK Automation Southern Africa Sensors & Transducers
The camera integrates easily into existing systems using system integration software, and features easily configurable input and output functionality.