DC Inductive/Capacitive Proximity Sensors

Introduction:
Inductive Proximity Sensors are the most widely used Sensor Technologies in the modern process control environment . The coil at the sensing face of the sensor is excited by a Sine-wave oscillator which produces an Electromagnetic field in the sensing face. When a metal object moves into the sensing range, due to Eddy Current effect, the oscillations are being dampened in the sensing circuitry. This change in status is detected by the detector circuit and is further processed by output logic driver section.

– –DC/TTL PNP or NPN
(250 mA)
No. Sheet & Circuit Protection 
100 mA / 500 mA
Smaller
Length
40/50
ModelFlush
Non- Flush
Sensing 
Range(mm)
NO/NCNO+NCNAMURNO 2 WireMC 2 WireNO+NC
4 Wire
MS-5Flush1* *   *
6.5Flush1* *   *
MS-8F
NF
1***   *
1.5***   *
MS-12F
NF
2*******
4*******
MS-18F
NF
5*******
8*******
MS-30F
NF
10*******
15*******
MS-35Non- Flush18*******
MS-40Non- Flush20*******
MS-50Non- Flush25*******
  • Capacity Proximity Sensor are available in this sizes
  • Ambient Temp. -250C to 750C
  • Standard Cable 2.5 mtrs.
  • Housing – also available in Nickel Plated Brass/SS/Plastic/Teflon
  • Annuncation by LED indication* Capacity Proximity Sensor are available in this sizes
  • Ambient Temp. -250C to 750C
  • Standard Cable 2.5 mtrs.
  • Housing – also available in Nickel Plated Brass/SS/Plastic/Teflon
  • Annuncation by LED indication

Correction Factors

Inductive proximity switches, the conductivity permeability quotient of the target is the parameter for the reduction factor. The following table contains some typical values for the reduction factor.

MaterialReduction Factor
Steel1
Stainless Steel0.85
Aluminium0.4
Brass0.4
Copper0.3

In capacity proximity switches, the relative permitivity is the parameter for reduction factor. The following table contain some typical values for the reduction factor.

MaterialReduction Factor
Water1
Ceramic0.6
Glass0.5
PVC0.45
Oil0.28

Options

  • Control units for regular switches
  • High ambient temperature upto 1200C
  • Amplifer unit for \’Namur\’ Switches
  • Rectangular front/side Plane sensing
  • Higher switching freq., other different shapes like ring type, Fork type, Plain Cylindrical type etc.
SpecificationACDC
Supply of Voltage90 to 230v10 to 30v
Load Current200mA / 500 mA100mA / 300mA
Voltage Drop Across the switch<8v<2v
Minimum Load Current5mA13mA
Hysterisi<15%<15%
Logic PNP/NPN
OutputNO/NCNO/NC
Protection ClassIP67IP65
Housing MaterialNI Plated BrassNI Plated Brass

Ambient Temp. -250C to 750C Annuniciation by LED induction standard cable : 2 mtrs.

Features
■ Wide variety of sizes
■ High switching frequencies
■ Different outpur configuration
■ Comprehensive AC & DC modules
■ Rugged construction with built-in protection
■ Versatile mounting options (Cylindrical & Cubide)

Benefits
■ Suitable for Oily, Dusty Enivorments
■ Contact-less, Maintenance free operations
■ Ability to withstand high shock and vibration enivorments

Application
■ Parts Counting
■ Speed Monitoring
■ Position Detection and Monitoring