High-Grade Threaded M4/M5/M6 Inductive Proximity Switch
The precision tier of the miniature range: pick the exact sensing-distance grade your gap needs — 0.6 to 1.5 mm — in a lock-nut-adjustable threaded body.
- M4×0.5 / M5 (25 mm bodies) and M6×0.75 (35 mm body)
- Selectable grades: 0.6 / 0.8 / 1.0 / 1.2 / 1.5 mm
- 44 catalogued part numbers — NPN/PNP × NO/NC at every grade
- 3-wire DC with factory wiring diagram
- Fine-pitch threads for sub-millimetre gap tuning
Why a "Grade-Selectable" Miniature Sensor Exists
Most miniature proximity switches give you one rated distance per size and leave the rest to your bracket design. This high-grade series inverts that: within the same M4/M5/M6 footprints as the economy M4–M6 line and the standard M5/M6 series, it catalogues up to four sensing-distance grades per thread size. That matters at miniature scale, where the whole working range is around a millimetre — a grade matched to the real gap keeps switching repeatable without re-machining fixtures.
It is the option to specify when a compact mechanism needs a documented, repeatable switching distance and the M8-and-up cylindrical sizes (see the M8 page) are physically too large.
Lock-Nut Mounting and Gap Adjustment
Model Selection Table (44 Part Numbers)
| Models (NPN NO / PNP NO / NPN NC / PNP NC) | Thread / body length | Sensing distance | Output & wiring | Connection |
|---|---|---|---|---|
| M4N10.6 / M4P10.6 / M4N20.6 / M4P20.6 | M4×0.5, 25 mm | 0.6 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M4N10.8 / M4P10.8 / M4N20.8 / M4P20.8 | M4×0.5, 25 mm | 0.8 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M4N110 / M4P110 / M4N210 / M4P210 | M4×0.5, 25 mm | 1.0 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M5N10.8 / M5P10.8 / M5N20.8 / M5P20.8 | M5, 25 mm | 0.8 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M5N110 / M5P110 / M5N210 / M5P210 | M5, 25 mm | 1.0 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M5N112 / M5P112 / M5N212 / M5P212 | M5, 25 mm | 1.2 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M5N115 / M5P115 / M5N215 / M5P215 | M5, 25 mm | 1.5 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M6N10.8 / M6P10.8 / M6N20.8 / M6P20.8 | M6×0.75, 35 mm | 0.8 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M6N110 / M6P110 / M6N210 / M6P210 | M6×0.75, 35 mm | 1.0 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M6N112 / M6P112 / M6N212 / M6P212 | M6×0.75, 35 mm | 1.2 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
| M6N115 / M6P115 / M6N215 / M6P215 | M6×0.75, 35 mm | 1.5 mm | NPN/PNP, NO/NC, 3-wire DC | Cable tail (⌀2.5 mm) |
IP rating, operating temperature and voltage window are not published for this series — confirm with the factory. Flush-mount behaviour is likewise unpublished; keep clearance around the face unless the factory confirms otherwise.
M6 Version (30 mm Drawing)
Typical Applications
Miniature indexing
Sub-millimetre position confirmation on small feed and index mechanisms.
Compact assembly cells
Small-part presence checks where M8 bodies cannot mount.
Retrofit points
Threaded body + two nuts matches existing bracket holes and lets you re-tune the gap on site.
OEM standardization
One family, three threads, 44 SKUs — fewer part types across product lines.
Frequently Asked Questions
What makes this the 'high-grade' tier compared with the economy M4/M5/M6 series?
Choice and precision. The economy M4–M6 line offers one 1.0 mm sensing grade per size; this high-grade line catalogues 44 part numbers with selectable grades — 0.6/0.8/1.0 mm on M4 and 0.8/1.0/1.2/1.5 mm on M5/M6 — so you order a distance that matches the real installation gap instead of adapting the mechanics to a single fixed value. All bodies are threaded for lock-nut fine adjustment, and a factory wiring diagram is supplied.
How do I read the model number?
Thread size + output letter + logic digit + distance code. N = NPN, P = PNP; 1 = NO, 2 = NC; the trailing digits are the sensing distance ('0.6' = 0.6 mm, '10' = 1.0 mm, '12' = 1.2 mm, '15' = 1.5 mm). So M5P212 is an M5 thread, PNP, normally-closed, 1.2 mm switch, and M6N115 is M6, NPN, NO, 1.5 mm.
Why would I pick a 0.6 mm grade when 1.0 mm exists?
A shorter rated distance gives a tighter, more repeatable switching point for precision indexing and small-gap position confirmation — useful when the mechanism itself only moves fractions of a millimetre. Conversely, pick 1.5 mm when target run-out or bracket tolerance eats into your margin.
Can the sensing gap be adjusted after installation?
Yes — that is the point of the threaded body. Mount through a bracket hole with two lock nuts, screw the barrel in or out until the gap is right, then lock. The M4×0.5 fine pitch moves 0.5 mm per turn, giving very fine control at these short sensing distances.
Can these be embedded flush in surrounding metal?
Flush/non-flush behaviour is not documented for this series, and mount type is not part of the model-number rule. Keep clearance around the sensing face, or confirm shielding behaviour with the factory before embedding. If a documented flush rating matters, the economy M5/M6 versions carry one.
What are the IP rating, temperature range and voltage?
The published specification covers thread/body sizes, output combinations, sensing grades and 3-wire DC wiring; IP rating, temperature range and the exact voltage window are not published for this series. We state that plainly rather than borrowing figures from sibling lines — confirm them with the factory against your application before ordering.
How do I order samples or an OEM batch, and can you cross-reference a competitor part?
Send the model list (or the competitor part number and your PLC input type) through the contact page. The four-way N/P × NO/NC matrix at every grade makes cross-referencing straightforward, and mixed-grade sample sets are the usual way to validate the right distance before a volume order.
Specs reviewed by Engineer Cai, Senior Application Engineer. See certificates.