The mounting of inductive sensors

To rule out unintentional interference of the measuring field and to achieve maximum sensing distances, it is required to follow the mounting instructions and to maintain the specified minimum distances. If the minimum distances are undercut, a reduction of the sensing distances is expectable. A sensor test directly at the application is recommended.

Mounting instructions for cylindrical forms

  • shielded (flush) mounting

    Sensor may be mounted flush in a metal plate. Choice of carrier material can have an influence on sensing distance.

    unshielded (non-flush) mounting

    There must be a space equal to the diameter of the sensing head, with no metal interference. Following this rule the electrical field strength is less attenuated, which enables a larger sensing distance.

    quasi shielded mounting

    When mounted in ferromagnetic material these sensors require a space (x) behind the active area that is free of metal. Sensors can be installed shielded (flush) when mounted in non ferrous materials (colored metals etc.). Always read and follow the installation instructions for distance measuring sensors.

    opposite mounting

    Minimum distances must be observed to prevent oppositely positioned sensors from affecting each other.

Maximum installation torque

  • Maximum installation torque

    To avoid damage to the proximity switches during mounting, the default torque value should not be exceeded. Reduce torque values by 30 % at the sensor’s face.

    Stainless steel thread:

    Brass nickel plated thread:
    Die-cast zinc thread:

    PBT thread:

    M4 = 1,8 Nm

    M3 = 0,9 Nm

    M12 = 1,5 Nm

    M5 = 2 Nm

    M8 = 7 Nm

    M18 = 3 Nm

    M8 = 10 Nm

    M12 = 15 Nm

    M30 = 15 Nm

    M12 = 20 Nm

    M18 = 40 Nm

    M18 = 55 Nm

    M30 = 200 Nm

Mounting instructions for housings without threads

Strong, occasional housing loads, like those which occur e.g. during fixing with headless screws, must be avoided (IFRM 03, 04, 06). Incorrect installation can lead to irreversible damage to the proximity switch.
Sensors with a housing diameter of 6.5 mm can be installed optimally with the plastic support bracket 10109474.

Cable dimensions

Housing ø

Wire diameter

Cable material*

ø 3

3 x 0,05 mm2


M5 / ø 4

3 x 0,08 mm2


M8 / ø 6,5 

3 x 0,14 mm2 



3 x 0,25 mm2



3 x 0,25 / 3 x 0,50 mm2



3 x 0,50 mm2 


* where not otherwise stated