Thread Detection (Thread Sensor) Probes

Automate manufacturing with thread detection sensors that identify threaded vs. unthreaded holes.

Thread Detection probes are specialized versions of our standard eddy-current displacement probes. They have extended sensing tips to allow easier penetration of tapped/untapped holes and to allow the sensing field to more easily engage the sides of the holes.

See our Thread Detection Application Note for details on using these probes with our standard sensor electronics.

Probe Selection

Selecting the right probe is dependent on the material type (ferrous vs. nonferrous) and the tapped hole size. The charts below identify the probe model required for your specific sensing needs.

Ferrous Materials

Metric

Inch

Probe

M6 x 1

1/4-20

T5BZ

M7 x 1

1/4-28

T5BZ

M8 x 1

M8 x 1.25

5/16-18

5/16-24

T6BZ

M10 x 1.25

M10 1.5

3/8-16

3/8-24

T7BZ

M12 x 1.25

M12 x 1.75

7/16-20

1/2-13

T8BZ

M14 x 1.5

M14 x 2

9/16-12

9/16-18

T10BZ

M16 x 1.5

M16 x 2

5/8-11

5/8-18

T12BZ

Use: ECA101 Eddy-Current sensor.

Nonferrous Materials

Metric

Inch

Probe

M5x0.8

T5BZ

M6x1

1/4 – 20

1/4 – 28

T6BZ

M7x1

5/16 – 18

T7BZ

M8x1

M8x1.25

5/16 – 24

T8BZ

M10x1.25

M10x1.5

3/8 – 16

3/8 – 24

T10BZ

M12x1.25

M12x1.75

7/16 – 20

1/2 – 13

T12BZ

M16x1.5

M16x2.0

T16BZ

Use: ECL101 Eddy-Current sensor

 

Thread Detection Probe Mechanical Details

Thread Detection Probe Mechanical Details

 

 

 

 

Mechanical Specifications

Probe

Dimension “A”

Body Thread

T5BZ0.13″ / 3.3mmM8x1
T6BZ0.16″ / 4.1mm
T7BZ0.20″ / 5.1mm
T8BZ0.23″ / 5.8mm
T10BZ0.30″ / 7.5mmM12x1
T12BZ0.37″ / 9.3mm
T16BZ0.52″ / 13.1mmM18x1

 

Probe Operating Environment
  • -25°C to +125°C IP67
Probe Cables

Standard probes have PUR (polyurethane) jackets. High-Temperature probes have FEP jackets. FEP cables can be custom ordered for standard temperature range probes.

More details on probe cabling are available in our Eddy-Current Probe Cabling Considerations TechNote.

Mounting Accessories

To minimize the chance of probe damage due to broken taps or misalignment, use mounting cushions for mounting probes. Size is selected to match the probe.

 

Model Number

SN-08

SN-12

SN-18

Internal Thread
(must match probe)
M8x1
(T5-8)
M12x1
(T10-12)
M18x1
(T16)
External ThreadM16x1.5M22x1.5M30x1.5
Maximum Extension0.35″ (8.9mm)0.41″ (10.4mm)0.49″ (12.4mm)

Dimensions mm [inch] (see below)

Dimension “F”22.0 [0.87]28.6 [1.12]35.8 [1.41]
Dimension “H”22.1 [0.87]22.1 [0.87]8.38 [0.33]
Dimension “O”8.89 [0.35]10.4 [0.41]12.4 [0.49]

 

Thread Sensor Thread Sensor