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Photo Electric Sensors

 

 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.

 

DIFFUSE TYPE SENSOR
12-24V & 10-30V DC

Model

Dia

Sensing

Frequency

HT-IRD-20

12

150 MM

150

HT-IRD-21

18

300 MM

100

HT-IRD-22

24

400 MM

100

HT-IRD-23

30

600 MM

100

HT-IRD-23A

30

1000MM

100

HT-IRD-24

36

1000 MM

100

HT-IRD-25

50

1500MM

100

HT-IRD-25A

50

2000MM

100

 

Effective Sensing Range = Standard Sensing Range X Correction Factor.

SPECIAL NOTE :

External gain adjustment facility : This can be provided in all types, on request. This is useful when different type of material is to be sensed. For example in hopper level sensing application; the type of liquid to be sensed may change in due course. In such case, by turning gain control potentiometer sensitivity can be readjusted. However; the maximum and minimum sensing distance which can be controlled through gain control pot varies with the type. Generally the limit is – 30% to +20% of nominal sensing range specified.

Through Beam Type Sensor

10-30V.DC PNP / NPN 200MA

Model

Dia

Sensing

Frequency

HT-IRT-13

12

2M

250

HT-IRT-14

18

5M

150

HT-IRT-15

24

8M

100

HT-IRT-16

30

10M

100

HT-IRT-16A

30

15M

100

HT-IRT-17

36

15M

100

HT-IRT-17A

36

20M

100

 

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 :

Supply

12V D.C. or 24V D.C.

Max. Range

110V – 230V A.C. 50/Hz.

Switching Speed

50/Sec

Sensitivity

Adjustable for maximum range

Output

Optional relay or solid state logic

Ambient Temp.

10oC to 50oC

TIME DELAY

Optional Adjustable up to 3 minutes

 

IMage

Retro Reflection Type Sensor

12V – 24V & 10-30V DC

Model

Dia

Sensing

Frequency

HT-IRR30

12

300MM

200

HT-IRR31

18

600MM

200

HT-IRR32

24

750MM

150

HT-IRR33

30

1000MM

150

HT-IRR34

36

1500MM

150

HT-IRR35

50

2000MM

150

HT-IRR35A

50

3000MM

150

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 :

Supply

10V to 30V D.C.

Max. Range

Up to 4000 mm.

Out-put

NPN or PNP

Switching Speed

25/Sec

Out Put Current

100 mA

Sensivity

Adjustable for maximum range

Ambient Temp.

10oC to 50oC

Protection

Short circuit proof, reverse polarity protection provided.


CONNECTION DIAGRAMS

 

Image

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.

 

Ordering Information

HI

HI-TECH

1001

1-D.C., 00, 1- Sensing Range

2001

2-A.C., 00, 1- Sensing Range

1001 / 8

8 Dimension

P

PNP

N

NPN

NF

Non-Flushing

F

Flush

IRT

Trough Beam

IRD

Diffuse Type

IRR

Rectro Type

IRF

Fork Sensor

 

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