Proximity and Photoelectric Sensors -

Inductive Proximity Sensors

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Inductive Proximity Sensors

Inductive proximity sensors can be used for position sensing, speed measurement, counting & in conditions such as oily, dusty, corrosive enviroment. Their applications are in Automobile, Steel Industries, CNC/NC machines, Conveyor systems, Packaging machines etc.

These 3 wire DC sensors are with NPN or PNP transistorised output and the load is connected in parallel.

Technical Specification - DC Type ( 3 Wire Version )

   

Supply voltage

10-30 V DC

Ripple on supply

10% max

No load current

Less than 10 mA

Maximum load current

100 mA / 300 mA (For M12 & above)

Hysterisis

15% max

Operating temperature

-25° C to +70° C

Output transistor

PNP or NPN

Output logic

NO or NC or NO +NC

Environmental protection

IP67

Ripple on supply

Less than 0.02 mm

Temperature drift

5% typical

Switch - ON effect suppression

Incorporated

Reverse polarity protection

Provided

Short circuit protection

Provided (For M12 & above)

Status indication

Provided through LED

   

Switching Frequency

Ø (mm) 8 8 12 18 30 36 50
Hz 2000 1000 800 300 200 100

Flush Mounting

Ø1 L1 L2 L Sn
8 45 - 45 1
12 55 20 75 2
16 55 20 75 5
18 55 20 75 5
20 50 20 70 5
25 50 20 70 8
30 50 20 70 10
36 60 20 80 15
50 40 20 60 20

Non Flush Mounting

Ø1 Ø2 L1 L2 L3 L Sn
8 7 40 - 5 45 2
12 10 45 20 5 70 4
18 16 45 20 10 75 8
20 16 50 20 10 80 8
22 16 50 20 10 80 8
25 23 50 20 10 80 10
30 28 35 20 15 70 15
36 33 35 20 25 80 20
50 46 40 20 20 80 25

Technical Specification - DC Type ( 2 Wire Version )

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Inductive Proximity Sensors
These Sensors are designed to work as solid state DC limit switches. The Sensors are connected directly in series with a load and have a bridge rectifier so they are not polarity conscious. The circuit is such that, when in off state, it allows very low current to flow through the load. However, a output load (such as relay) should be chosen, considering the voltage drop across the switch in the ON state. These sensors find wide application in electric control circuits and PLC's.

Supply voltage

10-60 V DC

Voltage drop across the

Less than 6.8 V

Switch Maximum load current

100 mA

OFF state current

Less than 1mA

Operating

-25° C to +70° C

Temperature Hysterisis 15% max

Switching frequency

5Hz typical

Output logic

NO or NC

Environmental protection

IP67

Status indication

Through LED

   

Flush Mounting

Ø1 L1 L2 L Sn
18 55 20 75 5
25 50 20 70 8
30 50 20 70 10
36 60 20 80 15
50 40 20 60 20

Non Flush Mounting

Ø1 Ø2 L1 L2 L3 L Sn
18 16 45 20 10 75 8
25 23 50 20 10 80 10
30 28 35 20 15 70 15
36 33 35 20 25 80 20
50 46 40 20 20 80 25

Technical Specification - AC Type ( 2 Wire Version )

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Inductive Proximity Sensors
These Sensors are designed to provide better alternative to conventional limit Switches / micro switches. These are epoxy potted similar to other types of sensors to render IP67 protection and hence are suitable even in underwater applications. The load (AC Contactor / AC Relay / Solenoid Coil) is to be connected in series with the switch.

Supply voltage

90-250 V AC or 20-250 V AC

Supply frequency

45 - 65 Hz

Load current

300 mA / 500 mA*

Leakage current

2.3 mA typical

Voltage drop across the switch

6.8 V eff

Maximum inrush current

6A; t < 10ms; f < 5

Minimum load current

5 mA

Operating temperature

-25° C to +70° C

Hysterisis

10% typical

Switching frequency

5Hz typical

Repeatability 1% typical

Temperature drift

5% typical

Switch - ON effect suppression

Provided

Output logic

NO or NC or NO+NC*

Status indication

Through LED


Flush Mounting

Ø1 L1 L2 L Sn
12 55 20 75 2
18 55 20 75 5
25 50 20 70 8
30 50 20 70 10
36 60 20 80 15
50 40 20 60 20

Non Flush Mounting

Ø1 Ø2 L1 L2 L3 L Sn
12 10 55 20 5 80 4
18 16 45 20 10 75 8
25 23 50 20 10 80 10
30 28 35 20 15 70 15
36 33 35 20 25 80 20
50 46 40 20 20 80 25


Inductive Sensors - Block Type

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Inductive Sensors

These are constructed in Rectangula, T type, Slot type, Pentagonal and Block types sensors. The technical specifications are similar to standard cylindrical sensors and are available in 3 wire DC & 2 wire AC types.

Technical Specification

RECTANGULAR SENSORS

H x W x D (mm)

Sn (mm)

16 x 19 x 35

4

16 x 19 x 49

4

50 x 25 x 10

5

14 x 40 x 26

2

   
T TYPE SENSOR Sn = 2mm
SLOT SENSOR  

H x W x D (mm)

 

60 x 45 x 30

 

Sensing Gap

Sn = 15mm

PANTAGONAL SENSOR

Sn = 5mm

   
BLOCK SENSORS

Sq x D (mm)

Sn (mm)

17 x 17 x 28

5

20 x 20 x 38

4

30 x 30 x 53

10

40 x 40 x 112.5

20

 
Proximity Sensor can be used:
• To drive DC relay
• To drive DC contactor (ask for load current 500 mA)
• To drive AC relay / AC contactor
• Can be coupled directly to any PLC/ DCS/ Logic Circuits
• Can be used as an input for a Digital Counter/ RPM Indicator etc.

 

Capacitive Sensors

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Capacitive Sensors

Capacitive Proximity Sensor is designed to detect and react to any object which moves into the operating zone. The sensor contains an oscillator. The capacitance of this oscillator is linked with the sensing face and when any object moves into the operating zone, its capacitance activates the oscillator. The sensor can detect conductive as well as non conductive material. It is advisable to have an object with permitivity more than one. The conductive objects are generally to be earthed for better results.

Technical Specification - (2 Wire AC)

Dimension

M30 X1.5 X 75 mm or M18 X 1 X 90mm

Supply voltage

10-30 V DC

Maximum load current

100 mA

Hysterisis

15% max.

Operating temperature

-25°C + 55°C

Output transistor

PNP or NPN

Output logic

IP65

Temperature drift

5% typical

Switch - ON effect suppression

Incorporated

Reverse polarity protection

Provided

Short circuit protection

Provided

Status indication

Provided through LED

Sensing range

15 mm adjustable through Potentiometer

Technical Specification - (3 Wire DC)

Dimension

M30X1.5X75mm

Supply voltage

90-250 VAC

Supply frequency

45 - 65 Hz

Load current

500 mA max.

Hysterisis

15% max.

Output logic

NO or NC

Status indication

Through LED

Sensing range

15 rnm adjustable through Potentiomete

   

Photo Electric Sensors

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Diffused Beam Sensors

Diffused Beam Sensors

This device consist of a transmitter and a receiver together. This look alike Inductive Proximity Sensor and hence 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 colour 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.

Type Ø (mm) L (mm) Sn
DBT - 100 18 90 100 mm
DBT - 200 18 90 200 mm
DBT - 500 30 90 500 mm
DBT - 1K 30 90 1 meter


Technical Specification

Response Time

5ms.

Switching Frequency

100Hz.

Operating Voltage

10 - 30 VDC

Maximum Load Current

100 mA.

Output

NPN or PNP

Maximum Current consumption 24mA (OFF)

At 240 DC (No Load)

34 mA (ON).

Voltage Drop

1 V Max.

Short Circuit Protection

Provided

LED Indicator

Provided

Temperature Limit

0 - 55°C.

Cable

2 Ws (std).

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

Applications
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.

Retro Reflective Sensors

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Diffused Beam Sensors
This is a system which consist of one device and a reflector. The device contains emitter and receiver. The rays emitted by the emitter are Tef!acted by the reflector to the receiver. The sensing of the object occurs when These rays are interrupted.

Type Ø (mm) L (mm) Sn
RBI - 300 18 90 300 mm
RBI - 1K 18 90 1 meter
RBI - 2K 30 90 2 meters
RBI - 3K 30 90 3 meters
RBI - 4K 30 90 4 meters

 

Technical Specification

Response Time

5ms.

Switching Frequency

100Hz.

Operating Voltage

10 - 30 VDC

Maximum Load Current

100 mA.

Output

NPN or PNP

Maximum Current consumption 25mA in OFF state

At 240 DC (No Load)

35mA in ON state

Voltage Drop

1 V Max.

Short Circuit Protection

Provided

LED Indicator

Provided

Temperature Limit

0 - 55°C.

Cable

2 Ws (std).

Advantages
• Easy assembly compared to the through beam type.
• Large active sensing range compared to diffused beam type.

Applications
This sensor can be used where it is difficult to install Through Eeam Sensor due to space constraint. Further, simple wiring makes it suitable where sensing objects are bigger in size. Thus these sensors are used for loop control in decoiler, edge detection in paper/sheet metal etc.


Through Beam Sensor with Ampifier Unit

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Through Beam Sensor with Ampifier Unit

This consist of two devices; a light emitter and a light receiver. These two devices are kept apart facing each other. The Gallium-Aluminium-Arsenide-Luminescent diode Integrated in the transmitter sends poses of light In the infra-red range which are Invisible to the human eye. The receiver opposite to the transmitter receive these rays. Sensing is achieved when these rays are interrupted by the object.

Type Ø (mm) L (mm) Sn
SBT - 300 12 40 300 mm
SBT - 1K 18 40 1 meter
SBT - 2K 18 40 2 meters
SBT - 3K 18 40 3 meters
SBT - 5K 18 40 5 meters
SBT - 10K 30 55 10 meters
SBT - 15K 30 55 15 meters

 

Technical Specification

Response Time

250ms.

Switching Frequency

2Hz.

Operating Voltage

Not applicable
Output is Through Amplifer Box 1 C/O Potential free contact of 5A (Resistive) at 230V

Maximum Load Current

Transmitter - 17 mA.
Reciver - 5 mA.

Output

Not applicable

Maximum Current consumption 25mA in OFF state

At 240 DC (No Load)

35mA in ON state

Voltage Drop

Provided on Amplifier Box.

Short Circuit Protection

Provided on Amplifier Box.

LED Indicator

Provided on Amplifier Box.

Temperature Limit

0 - 55°C.

Cable

2 Ws (std).

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.

Applications
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.

IR Amplifier Unit

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Power supply

230V AC / 110 AC

Input Through Transmitter & Receiver

Output

1 C/o relay contact or Digital Output

Connection

Through connection strip (12 Terminal)

Dimensions

60 x 70 x 110 mm (HxWxD)

Mounting

Wall mounting or DIN RAIL mounting