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Capacitive Sensors with Programmable Output


Capacitive NO/NC Selectable AC/DC & AC Sensors

 

 

  Features:
capacitive sensor
  • NO/NC output selector switch
  • AC/DC, AC power supply
  • Sensing of metallic and non-metallic objects
  • Adjustable operating distance
  • Cylindrical threaded metal or plastic casing
  • Short circuit protection up to 50V in DC
  • LED indication of the output logic status
  • Cable and connector versions
  • Protective housing available for mounting into containers
  • CE Compliant to the EMC directive
  • RoHS Compliant

DESCRIPTION
Capacitive sensors are used to detect metallic and non-metallic objects (liquid, plastic, wooden materials and so on). These capacitive sensors have a normally open or normally closed output selector switch and operate on a wide voltage range, 20 - 250 V AC/DC or 20-250 VAC. This greatly reduces the need to keep multiple sensors in stock. These models are also not polarity sensitive so there is no complicated wiring or a need to reverse wiring to change the output.

Their housing consists of a cylindrical threaded metal or plastic 30 mm diameter case. They are dust and water tight as well as shock and vibration resistant. All models feature LED indication of the output status and short circuit protection up to 50V in DC.

A screw placed on the sensor allows regulation of the operating distance. This sensitivity regulation is useful in applications, such as detection of full containers and non-detection of empty containers.

A waterproof protective housing is available. This housing is made of a non-toxic material (POM) and has a standard 1 1/2" GAS threaded fitting for mounting into a container. This housing permits a sensor to be rapidly removed for testing without the loss of material and protects the sensor from abrasion. The use of the housing can help to eliminate variation in the sensitivity of the sensor due to deposits of material.

 

OPERATING PRINCIPLE
Capacitive proximity sensors use the variation of the parasitic capacity that develops between the sensor and the object being detected. When the object is at a preset distance from the sensitive side of the sensor, an electronic circuit inside the sensor begins to oscillate. The rise or fall of such oscillation is identified by a threshold circuit that drives an amplifier for the operation of an external load.

The operating distance of the sensor depends on the actuator shape and size and is strictly linked to the nature of the material (Table 1.).

Table 1. Sensitivity when different materials are present. Sn = operating distance.
Metal ~ 1 x Sn
Water ~ 1 x Sn
Plastic ~ 0.5 x Sn
Glass ~ 0.5 x Sn
Wood ~ 0.4 x Sn

 

 
Model
Output Function
NO/NC select
S5141
S5171

Dimensions: mm
1 mm = .03937"
1" = 25.4 mm

Operating Distance (Sn)
0-20 mm (Adjustable)
0-25 mm (Adjustable)
External Diameter
M30 x 1.5
Power Supply (AC/DC)
20-250 Vac/dc
Max. Switching Current
500 mA
Min. Switching Current
10 mA
Max Peak Current (20ms)
1.5 A
Residual Current
<= 2 mA
Voltage Drop (sensor on)
< 6 V
Short Circuit Protection
Yes up to 50V in DC
Operating Frequency
10 Hz
Repeatability (%Sn)
<= 10%
Hysteresis (%Sn)
<= 20%
Case
Nickel-plated brass
Plastic
Flush Mounting
Yes
No
Protection Degree
IP 65
Operating Temperature
-25 to +70°C
Output Connection
Connector included
Protective Housing Model
-
S5912

Wiring:  
Selector (NO/NC):
Warning Before giving power to the sensor, program the sensor using the selector switch to the required function of NO (normally open) or NC (normally closed)

 

 

 
Model
Output Function
NO/NC select
S5210
S5215
S5212
S5217

Dimensions: mm
1 mm = .03937"
1" = 25.4 mm

Capacitive Sensor
Capacitive Sensor
Capactive Sensor
Capacitive Sensor
Operating Distance (Sn)
0-20 mm (Adjustable)
0-25 mm (Adjustable)
0-20 mm (Adjustable)
0-25 mm (Adjustable)
External Diameter
M30 x 1.5
Power Supply (AC)
20-250 Vac
Max. Switching Current
500 mA
Min. Switching Current
10 mA
Max Peak Current (20ms)
1.5 A
Residual Current
<= 1 mA
Voltage Drop (sensor on)
<= 6 V
Short Circuit Protection
Yes up to 50V in DC
Operating Frequency
10 Hz
Repeatability (%Sn)
< 10%
Hysteresis (%Sn)
Depends on (Sn) <= 20%
Case
Nickel-plated brass
Plastic
Nickel-plated brass
Plastic
Flush Mounting
Yes
No
Yes
No
Protection Degree
IP 65
Operating Temperature
-25 to +70°C
Output Connection
Cable, L=3m
Connector C
Protective Housing Model
-
to be advised
-
to be advised

 

Selector (NO/NC):

Warning

Before giving power to the sensor, program the sensor using the selector switch to the required function of NO (normally open) or NC (normally closed)

Capacitive sensor

CABLE VERSION WIRING:
Capactive sensor wiring
CONNETOR VERSION WIRING:
Capactive sensor wiring
MATING CONNECTORS:
ID#   Type Description
4 wire    
S3496/2 C right angle w/ 2 meter cable
S3496   C right angle w/ 5 meter cable
S3499/2 C straight w/ 2 meter cable
S3499 C straight w/ 5 meter cable
030502  C right angle, terminal screws field wire-able
030503 C straight, terminal screws field wire-able
Accessories:

Protective housing:

S5912 for sensors with block connectors
S5913 for cable & C connector verisons

 

 

 




 
 
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