Diffused Beam Sensor
 Through Beam Type Sensor
 Retro-Reflective Sensors

WORKING PRINCIPLE :

This device consist of a transmitter and a receiver together. This look alike Inductive Proximity Sensor and hence is also known as IR Proximity Sensor. The emitter emits Infra red rays which are reflected on the receiver through the object to be registered. In the use of these sensors, it is important to bear in mind the colour of the object. Light corresponds to the maximum distance and vice versa. In case of shiny object; the effect of surface of object is more important than the colour.

ADVANTAGES :

• Transmitter and receiver are housed in the same housing.

• As the self reflection of an object is used for detection; Dark & Light marks can be distinguished.

FIELD OF APPLICATION :

These Sensors are particularly used for position sensing and counting of non metallic objects. It is also used for Label sensing, Level sensing, Height sensing, Plastic film sensing, Edge detection of paper or sheet metal etc.

WORKING PRINCIPLE :

The ‘Through Beam Type’ Photo Electric Sensor using the emitter and receiver mounted in separate units with the ‘Infra Red’ beam passing from one unit to the other provides a longer range than either the Diffuse or Retro Reflective Sensors. An out put signal is given, when any objects break the light beam.

The plug in amplifier is designed to operate at high gain to ensure non-critical alignment unaffected by dusty atmosphere.

The unit operates on 12V, 24V D.C. and 230V A.C. and provides optional relay or solid-state logic output.

ADVANTAGES :

• Large sensing distance is possible as emitter and receiver are kept opposite to each other.

• Suitable for precise detection of large as well as small objects.

• Repeatability and indexing precision are not impaired even if the object surface or background is reflecting.

FIELD OF APPLICATION :

Through Beam Sensors are used for sensing Semitransparent opaque objects such as Glass/Plastic Bottle, Sliver breakage detection, Paper breakage detection, Door opening/closing etc.

TECHNICAL CHARACTERISTICS :

WORKING PRINCIPLE :

The ‘Retro Reflective Sensors’ with modulated beam Infra Red Technique are designed to operate in any type of environment unaffected by vibrations, ambient light, and weather condition. It can be used for all type of non-contact sensing, object detection in automation and counting indifferent industries, automatic door opening/closing (lifts) and also safety and security application.

It senses the reflection of the beam when blocked by any object and gives an out-put signal.

The sensor is housed in chrome plated brass tubes of18mm to 30mm Dia. and also available in Compact Plastic Boxes for easy installation. Range available up to 300 mm, 1000 mm and 4000 mm. All the sensors are provided with short circuit proof and reverse polarity protection.

ADVANTAGES :

• Easy assembly compared to the through beam type.

• Large active sensing range compared to diffused beam type.

TECHNICAL CHARACTERISTICS :

Photoelectric Sensor can be used :

#    To drive DC relay

#    Can be coupled directly to any PLC / Logic Circuit

#    Can be used as an input for a Digital Counter / RPM
       Indicator etc.