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Inductive proximity sensors detect the presence of metallic objects at close range (typically inches). Ferrous metals allow the greatest sensing distances; other metals may reduce detection range. Low-cost sensors are available in shapes, sizes and materials for a wide range of applications.
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Inductive Proximity Sensors
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Inductive proximity sensors detect the presence of metallic objects at close range (typically up to 1.5 inches). They do this by creating an electromagnetic field around the sensing surface that is disrupted when a metallic object crosses within the field. A change in the electromagnetic field's amplitude caused by this object will be detected by a threshold circuit within the sensor, signaling the presence of the object to a connected control device such as a PLC or relay.
Ferrous metals allow the greatest distances to the sensor; other metals may reduce detection range. Flush-mounted sensors are embeddable (flush with mounting surface); semi- and non-flush sensors allow longer sensing distances, and their sensing face must protrude from/beyond the mounting surface.
Low-cost, reliable sensors are available in an array of shapes, sizes and with special features for a wide range of applications.
- A wide selection from name brands including Contrinex, Koyo, Micro Detectors, and AutomationDirect's ProSense and value lines
- Complete overload protection on most models
- Factor 1 sensors provide a constant sensing range, without adjustment, on all ferrous and non-ferrous metals
- Weld slag resistant harsh duty sensors have a PTFE material coating that prevents weld slag build-up and allows weld spatter to be wiped off easily
- High-temperature resistant models are rated for temperatures up to 230°C
- High-pressure resistant models are suitable for hydraulic applications
- Metal chip immunity eliminates the risk of false switching due to metal debris
For part listings and specifications, go to Shop Now
3mm Round
3mm round inductive proximity sensors are perfect for applications with very limited space.
- 0.6mm, 0.8mm and 1mm (flush) sensing distances
- N.O. or N.C. output options
- PNP and NPN models
- Up to 8kHz switching frequency
- 10-30 VDC operating voltage
- Stainless steel housing
- IO-Link versions available
- High-pressure rating 200 bar (2900 psi) on select models
- 2m axial cable
- Up to IP68 protection ratings
4mm Round
4mm round inductive proximity sensors, available with smooth or threaded barrels, provide easy installation in tight spaces.
- 0.6mm to 3mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. output options
- PNP and NPN models
- Up to 8kHz switching frequency
- 10-30 VDC operating voltage
- Factor 1, IO-Link, and harsh duty versions available
- Stainless steel housing
- 2m axial cable and M8 quick-disconnect styles
- IP67 protection rating
5mm Round
5mm round threaded-barrel proximity sensors are ideal for small spaces and close-in sensing.
- 0.8mm to 3mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. output options
- PNP and NPN models
- Up to 5kHz switching frequency
- 10-30 VDC operating voltage
- Factor 1, IO-Link and harsh duty versions available
- Nickel silver or stainless steel housing, depending on model
- 2m axial cable and M8 quick-disconnect termination styles
- IP67 protection rating
6.5mm Round
6.5mm round, smooth-barrel inductive proximity sensors feature a stainless-steel housing with status LED.
- 1.5mm and 2mm (flush) sensing distances
- N.O. or N.C. output options
- PNP and NPN models
- 7KHz switching frequency
- 10-30 VDC operating voltage
- Stainless steel housing
- 2m axial cable and M8 quick-disconnect termination styles
- IP67 protection rating
8mm Round
8mm round inductive proximity sensors offer discrete or analog outputs, and AC or DC operating power. High-temp or high-pressure resistance, Factor 1 correction, and weld-slag resistant coating models are available.
- 1.5mm to 6mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. discrete output; 0-5 VDC, and 0-10 VDC analog output options
- PNP and NPN models
- Up to 7kHz switching frequency
- Available in a variety of operating voltages and housing materials
- IO-Link and harsh duty versions available
- High-pressure rating 500 bar (7251 psi) on select models
- High-temperature rating up to 140°C [284°F] on select models
- Axial cable and quick-disconnect termination styles
- Up to IP69K protection ratings
10mm Round
10mm round inductive proximity sensors feature a rugged stainless steel housing and are DNV-GL certified for maritime use.
- 0.6mm (flush) sensing distance
- N.O. PNP output
- 2kHz switching frequency
- 10-30 VDC operating voltage
- IO-Link v1.1 capable
- 5.5in or 9.25in axial cable
- IP68 protection rating
12mm Round
12mm round inductive proximity sensors offer discrete or analog outputs, and AC or DC operating power. High-temp or high-pressure resistance, Factor 1 correction, weld-slag resistance, and metal chip immunity models are available.
- 1.5mm to 10mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. discrete, and analog output options
- PNP or NPN, and AC output models
- Up to 3kHz switching frequency
- Available in a variety of operating voltages and housing materials
- High-pressure rating 500 bar (7251 psi) on select models
- High-temperature rating up to 150°C [302°F] on select models
- IO-Link and harsh duty versions available
- Axial cable and quick-disconnect termination styles
- Up to IP69K protection ratings
18mm Round
18mm inductive proximity sensors offer a wide range of features/options including discrete or analog outputs, and DC or AC operating power. High-temp resistance, Factor 1 correction, weld-slag resistance, and metal chip immunity models are available.
- 5mm to 20mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. discrete, and analog output options
- PNP or NPN DC, and AC output types
- Up to 2kHz switching frequency
- Available in a variety of operating voltages and housing materials
- High-temperature rating up to 230°C [446°F] on select models
- IO-Link and harsh duty versions available
- Axial cable and quick-disconnect termination styles
- Up to IP69K protection ratings
30mm Round
30mm inductive proximity sensors detect ferrous metal objects at farther distances and offer a wide range of feature/options including discrete or analog outputs, and AC or DC operating power. High-temp resistance, Factor 1 correction, weld-slag resistance, and metal chip immunity models are available.
- 10mm to 40mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. discrete, and analog output options
- PNP or NPN DC, and AC output models
- Up to 2kHz switching frequency
- Available in a variety of operating voltages and housing materials
- High-temperature rating up to 230°C [446°F] on select models
- IO-Link and harsh duty versions available
- Axial cable and quick-disconnect termination styles
- Up to IP69K protection ratings
50mm Round
Large 50mm inductive proximity sensors offer a long sensing distance, feature a stainless steel housing and are high-temperature resistant.
- 25mm (non-flush) sensing distance
- N.O., PNP output
- 150Hz switching frequency
- 10-30 VDC operating voltage
- -13 to 446 °F [-25 to 230 °C] temperature range
- 12m axial cable
- IP67 protection rating
Small Rectangular
Newest Additions!
- More Contrinex small rectangular proximity sensors
Small rectangular inductive proximity sensors are cost-effective sensors in a range of housing dimensions that can detect ferrous metal objects at distances up to 7mm.
- 0.8mm to 7mm sensing distances
- Flush, semi-flush, and non-flush mounting options
- N.O. or N.C. discrete, and 0-10 VDC analog output options
- PNP and NPN models
- Up to 5kHz switching frequency
- 5-30 VDC, 10-30 VDC and 15-30 VDC operating voltage ranges
- Available in a variety of housing materials
- IO-Link and harsh duty versions available
- Axial cable and quick-disconnect termination styles
- Up to IP69K protection ratings
Large Rectangular
Newest Additions!
- ProSense D80 series large rectangular inductive proximity sensors
Large rectangular inductive proximity sensors detect ferrous metal objects at distances up to 60mm; select models offer a sensing face with five selectable mounting orientations. These AC- or DC-powered sensors are available in a variety of output types and termination styles.
- 20mm to 60mm sensing distances
- Flush and non-flush mounting options
- N.O. or N.C. output options
- PNP DC and AC output models
- Select "pancake" style models offer large sensing faces
- Up to 100Hz switching frequency
- IP65 or IP67 protection rating
Inductive Proximity Accessories
A variety of mounting brackets and adapters are available for affixing inductive proximity sensors including axial, right-angle, and swivel-mount models in various materials including plastic, plated steel, or stainless steel. Spare hex nuts are also available.
Sensor Tester
Sensor testers save time by determining if a sensor is functional before installation. This unit is lightweight and compact so it can be stored in a desk drawer and carried in a pocket. It includes a rechargeable battery and micro-USB charging cable.
- Fast field check of various DC sensor types
- LED and acoustic indicator
- Current supply to 100mA
- Includes rechargeable battery
- Universal micro-USB charger
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