JM18/JM30 Inductive Proximity Switch with M12 Quick-Disconnect
The long-range members of the DAIDISIKE plug-in family: M18 and M30 barrels, an M12 connector tail, and non-flush grades reaching 40 mm.
- JM18: 5–20 mm · JM30: 10–40 mm (flush / non-flush)
- M12 4-pin plug — swap sensors without re-terminating
- NPN/PNP × NO/NC at every grade, 10–30 V DC
- Two body lengths per size (79/78 mm and 50 mm)
- IP67, LED indicator, short-circuit protected
Plug-In Tail, Long-Range Coil
Our cable-terminated M18/M30 three-wire series remains the straightforward pick for fixed installations. The JM version answers a different question: how do you keep a line running when big, exposed sensors occasionally get hit? With an M12 cordset staying in the cable tray, a damaged JM18/JM30 is unscrewed and replaced in well under a minute — no junction box, no wire stripping, no mislabelled cores.
Within the plug-in family, this page is the long-distance end; the JM12 and JM8 pages cover the compact barrels, and the JD D6.5 covers the slim smooth-barrel probe. All share the same quick-disconnect logic, so one cordset standard can serve a whole machine.
Sensing Distance by Size and Mounting
Model Selection Table
| Models | Size / body length | Mounting | Sensing distance | Response / frequency | Output & connection |
|---|---|---|---|---|---|
| JM1805 N1/P1/N2/P2 (+79 or +50) | M18, 79 or 50 mm body | Flush | 5 mm | 0.2 ms / up to 1 kHz | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM1808 N1/P1/N2/P2 (+79/50) | M18, 79 or 50 mm body | Flush | 8 mm | See grade table | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM1812 N1/P1/N2/P2 (+79/50) | M18, 79 or 50 mm body | Flush | 12 mm | See grade table | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM1808T · JM1816T · JM1820T (N/P, 1/2, +79/50) | M18, 79 or 50 mm body | Non-flush (T) | 8 / 16 / 20 mm | Slower at longer grades | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM3010 N1/P1/N2/P2 (+78 or +50) | M30, 78 or 50 mm body | Flush | 10 mm | See grade table | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM3015 N1/P1/N2/P2 (+78/50) | M30, 78 or 50 mm body | Flush | 15 mm | See grade table | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM3022 N1/P1/N2/P2 (+78/50) | M30, 78 or 50 mm body | Flush | 22 mm | See grade table | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
| JM3015T · JM3025T · JM3040T (N/P, 1/2, +78/50) | M30, 78 or 50 mm body | Non-flush (T) | 15 / 25 / 40 mm | Down to 100 Hz at 40 mm | NPN/PNP, NO/NC · M12 4-pin plug, 10–30 V DC |
Housing material and operating-temperature range are not published for this series — confirm with the factory if either is critical to your environment. Per-grade response/frequency figures are in the factory grade table (0.2 ms / 1 kHz at 5 mm down to 100 Hz at 40 mm).
JM30 Version (78 mm Drawing)
Typical Applications
Pallet & carrier detection
Long non-flush grades tolerate loose positioning on chain conveyors and shuttles.
Crash-prone stations
Plug-in tail turns an exposed sensor into a one-minute swap instead of a wiring job.
Heavy machinery position
M30 barrels with 22–40 mm reach for gates, arms and large moving frames.
Pre-wired machine builds
Cordsets routed and tested before sensors mount — plug together at final assembly.
Frequently Asked Questions
How is the JM series different from the standard M18/M30 three-wire proximity switches on this site?
The sensing barrel is comparable; the tail is not. The standard M18/M30 three-wire series is cable-terminated, while every JM18/JM30 ends in an M12 4-pin quick-disconnect connector. You buy the mating cordset once, route it permanently, and afterwards sensors swap by hand in seconds. The JM line also publishes longer non-flush grades — up to 40 mm on JM3040 — making it the longest-reach inductive option in our connector family.
What sensing distances are available on JM18 and JM30?
JM18: 5/8/12 mm flush and 8/16/20 mm non-flush. JM30: 10/15/22 mm flush and 15/25/40 mm non-flush. As with all inductive sensors, ratings assume a mild-steel target; de-rate for stainless, brass or aluminium and confirm the correction factor with the factory for marginal gaps.
How do I compose a full part number?
Base code + output + logic + optional T + length. Example: JM1805N179 = M18, 5 mm flush, NPN, NO, 79 mm body; JM3040P2T50 = M30, 40 mm non-flush, PNP, NC, 50 mm body. JM18 takes length suffix 79 or 50; JM30 takes 78 or 50.
When is the 40 mm non-flush grade the right choice?
When targets are set back from the mounting face or positioning is loose — pallet frames, gate arms, agricultural and heavy machinery. Trade-offs: the sensing face protrudes, needs a metal-free zone, and the switching frequency at 40 mm falls to about 100 Hz, so it is a presence detector rather than a high-speed counter.
What are the electrical basics?
10–30 V DC 3-wire supply, NPN or PNP output in NO or NC, short-circuit protection with a 180 mA overload trip, IP67 sealing and a built-in LED. Wire via the M12 cordset: brown +V, blue 0 V, black signal (white joins on dual-output NO+NC variants).
Are these usable in safety circuits?
Only as plain status inputs. They carry no IEC 61496 / ISO 13849 safety certification and must never be the sole means of personnel protection — that duty belongs to certified interlock switches or safety light curtains, which we also manufacture.
What about cordsets, MOQ and delivery?
Order M12 4-pin cordsets together with the sensors so connector coding and pin-out are guaranteed to match — ask the factory for the recommended cordset part numbers. MOQ and lead time depend on the model mix; send your list through the contact page and we will quote with samples available on stock variants.
Specs reviewed by Engineer Cai, Senior Application Engineer. See certificates.