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Inductive sensors M4

( number of products: 40 )

Miniature inductive sensors M4: sensing range 0.6–1 mm, PNP or NPN output, NO or NC function, cable or M8 connector. Use the filters to narrow the list; selection tips are below the list.

Other sizes: M5, M8, M12, M18, M30 inductive sensors.

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Inductive sensor M4 – what this category offers

An inductive sensor M4, also called a proximity sensor, detects metal objects without contact. It is a miniature size for places where an M8 sensor does not fit. All models in this category share a few features:

  • supply voltage 10–30 V DC, output load up to 100 mA, short-circuit protection,
  • IP67 protection rating and ambient temperature from -25 to +70°C,
  • LED indicator,
  • PBT sensing face, stainless steel housing, 25 mm long.

Sensing range of the inductive sensor M4

Three rated sensing ranges Sn are available: 0.6, 0.8 and 1 mm. All M4 sensors are designed for flush mounting, so the sensing face can sit level with the metal surface. For a longer range, see inductive sensors M5. The whole family is in the category miniature inductive sensors M4 and M5.

Sensing range and the detected metal

The rated range applies to steel. For other metals, multiply it by the reduction factor:

  • Fe37 steel – 1,
  • cast iron – 0.95–1,
  • stainless steel – 0.8–1,
  • nickel – 0.6–0.75,
  • brass – 0.4–0.7,
  • aluminium – 0.35–0.6,
  • copper – 0.25–0.5.

Example: an M4 sensor with a 1 mm range detects aluminium from 0.35 to 0.6 mm.

Switching frequency

All M4 sensors have a switching frequency of 2 kHz and a response time of 0.1 ms.

PNP or NPN, NO or NC

M4 sensors are available with a PNP or NPN output – the choice depends on the controller inputs. The differences are explained in the guide PNP vs NPN – how inductive sensors differ. The switching function is NO or NC and all models are 3-wire. More about the functions in the guide inductive sensors NO, NC and NO & NC.

Housing length and connection

  • with cable – housing 25 mm, PVC cable 2.3 mm in diameter, 2, 3 or 5 m long,
  • with a 0.3 m cable ending in an M8 connector.

Cable and connector for the M4 sensor

Sensors with an M8 connector work with cables with M8 and M12 connectors and field-wireable M8 and M12 connectors.

Frequently asked questions

Does the inductive sensor M4 detect aluminium?

Yes, but from a shorter distance than steel. The reduction factor for aluminium is 0.35–0.6.

What supply voltage does the inductive sensor M4 need?

Sensors in this category operate at 10–30 V DC.

What warranty do Nexotec sensors have?

24 months.