turck articles

Barrel Sensor Mounting

TURCK 7/19/2018

TURCK inductive proximity sensors are manufactured with a shielded coil, designated by “Bi” in the part number, and a nonshielded coil, designated by “Ni” in the part number. Embeddable (shielded) units may be safely flush-mounted in metal. Nonembeddable (nonshielded) units require a metal free area around the sensing face. Because of possible interference of the electromagnetic fields generated by the oscillators, minimum spacing is required between adjacent or opposing sensors.

It is good engineering practice to mount sensors horizontally or with the sensing face looking down. Avoid sensors that look up wherever possible, especially if metal filings and chips are present.

Maximum Locknut Torque Specifications

The locknut torque should be considered for all threaded sensors to prevent the housing from being over stressed. The values below pertain to the locknut provided with each sensor. Liquid thread sealants of an anaerobic base, such as Loctite, are recommended if strong vibrations are likely.

Caution: Sensor barrels are typically brass. Consider break torque when selecting grade of thread sealant.
 
Barrel Size Metal Barrel Plastic Barrel
5 mm 5 Nm (3.7 ft-lb) ---
8 mm 10 Nm (7.4 ft-lb) ---
12 mm 10 Nm (11 ft-lb) 1 Nm (0.7 ft-lb)
18 mm 25 Nm (18 ft-lb) 2 Nm (1.4 ft-lb)
30 mm 90 Nm (66 ft-lb) 5 Nm (3.7 ft-lb)
47 mm 90 Nm (66 ft-lb) ---

Drill Hole Sizes for Metric Threads
Thread Size Pitch Thru Hole (mm) Tap Hole Dia. (mm) Thru Hole (in) Tap Hole Dia. (in)
M5 x 0.5 0.5 5.0 4.5 13/64 5/32
M8 x 1 1.0 8.0 7 21/64 1/4
M12 x 1 1.0 12.0 11 31/64 13/32
M18 x 1 1.0 18.0 17 23/32 41/64
M30 x 1.5 1.5 30.0 28 1-3/16 1-5/64
PG 9 1.41 15.2 14 5/8 1/2
PG 13.5 1.41 20.4 19 13/16 23/32
PG 36 1.59 47.0 45.5 1-7/8 1-47/64

Embeddable Mounting Considerations

Barrel Sensor Mounting

Flush Mountable
Sensor Type Barrel Diameter A B C D E
Bi 1 4.00 3.00 8.00 6.00 12.00 6.00
Bi 1 5.00 3.00 10.00 8.00 15.00 6.00
Bi 1.5U 6.50 5.00 13.00 10.00 20.00 9.00
Bi 1.5 6.50 5.00 13.00 10.00 20.00 9.00
Bi 2 6.50 6.00 13.00 10.00 20.00 12.00
Bi 1.5U 8.00 5.00 16.00 12.00 24.00 9.00
Bi 1.5 8.00 5.00 16.00 12.00 24.00 9.00
Bi 2 8.00 6.00 16.00 12.00 24.00 12.00
Bi 2 11.00 6.00 22.00 17.00 33.00 12.00
Bi 2 12.00 6.00 24.00 18.00 36.00 12.00
Bi 3U 12.00 9.00 24.00 18.00 36.00 18.00
Bi 3 12.00 9.00 24.00 18.00 36.00 18.00
Bi 4 12.00 12.00 24.00 18.00 36.00 24.00
Bi4U 12.00 12.00 24.00 18.00 36.00 24.00
Bi 5U 18.00 15.00 36.00 27.00 54.00 30.00
Bi 5 18.00 15.00 36.00 27.00 54.00 30.00
Bi 7 18.00 21.00 36.00 27.00 54.00 42.00
Bi 8U 18.00 24.00 36.00 27.00 54.00 48.00
Bi 8 18.00 24.00 36.00 27.00 54.00 48.00
Bi 10U 30.00 30.00 60.00 45.00 90.00 60.00
Bi 10 30.00 30.00 60.00 45.00 90.00 60.00
Bi 12 30.00 36.00 60.00 45.00 90.00 72.00
Bi 15 30.00 45.00 60.00 45.00 90.00 90.00
Bi15U 30.00 45.00 60.00 45.00 90.00 90.00
Bi 20 47.00 60.00 94.00 71.00 141.00 120.00
Bi 25 47.00 75.00 94.00 71.00 141.00 150.00

Dimensions are in mm.

Nonembeddable Mounting Characteristics

Barrel Sensor Mounting

Non-flush Mountable
Sensor Type Barrel Diameter A B C D E F 1 Side 2 Side 3 Side
Ni 3 6.50 9.00 20.00 10.00 20.00 18.00 6.00      
Ni 3 8.00 9.00 24.00 12.00 24.00 18.00 6.00      
Ni 4U 8.00 12.00 24.00 12.00 24.00 24.00 8.00      
Ni 4 8.00 12.00 24.00 12.00 24.00 24.00 8.00      
Ni 5 11.00 15.00 33.00 17.00 33.00 30.00 10.00      
Ni 4 12.00 12.00 36.00 18.00 36.00 24.00 8.00      
Ni 5 12.00 15.00 36.00 18.00 36.00 30.00 10.00      
Ni 8U 12.00 24.00 36.00 18.00 36.00 48.00 16.00 Sr=6 mm*    
Ni 8 12.00 24.00 36.00 18.00 36.00 48.00 16.00      
Ni10U 12.00 30.00 1836.00 18.00 36.00 60.00 16.00      
Ni 8 18.00 24.00 54.00 27.00 54.00 48.00 16.00      
Ni 10 18.00 30.00 54.00 27.00 54.00 60.00 20.00      
Ni 12U 18.00 36.00 54.00 27.00 54.00 72.00 20.00 Sr=10 mm* Sr=9 mm* Sr=9 mm*
Ni 14 18.00 42.00 54.00 27.00 54.00 84.00 20.00      
Ni15U 18.00 45.00 54.00 27.00 54.00 90.00 20.00      
Ni 10 20.00 30.00 60.00 30.00 60.00 60.00 20.00      
Ni 15 30.00 45.00 90.00 45.00 90.00 90.00 20.00      
Ni 20U 30.00 60.00 90.00 45.00 90.00 120.00 25.00 Sr=15 mm* Sr=12 mm* Sr=11 mm*
Ni 20 30.00 60.00 90.00 45.00 90.00 120.00 20.00      
Ni30U 30.00 90.00 90.00 45.00 90.00 180.00 25.00      
Ni 20 40.00 60.00 120.00 60.00 120.00 120.00 40.00      
Ni 30 40.00 90.00 120.00 60.00 120.00 180.00 40.00      
Ni 25 47.00 75.00 141.00 71.00 141.00 150.00 40.00      
Ni 40 47.00 120.00 141.00 71.00 141.00 240.00 40.00      

Dimensions are in mm.
* Only DC Sensors

Barrel Sensor Mounting