Inductive · 15 – 28 mm short barrel

Ultra-Short Inductive Proximity Sensors (15 – 28 mm body)

A 15 mm long barrel where a standard 45 mm body has nowhere to go — measured from the face, not from the thread.

Model LJ03M-D / LJ04M-D / LJ05M-D / LJ6.5M-D / LJ6.5M-Y / LJ8M-D / LJ8C-D / LJ12M-D / LJ12C-D · Brand LE Raun · Category: Proximity Sensors

Bodyφ3 – M12

Length15 – 28 mm

Sensing0.6 – 4 mm

ProtectionIP67

Request a quote Full specifications

Overview

Everything in this family trades barrel length for mounting depth. The φ3, φ4 and M5 bodies are 15 mm long; the φ6.5 and M8 bodies run 18 – 22 mm; the M12 bodies are 22 mm flush and 28 mm non-flush. Sensing distance is unchanged from the standard versions of the same diameter, so a short body is a mounting decision, not a performance one.The Y versions are the shortest of the φ6.5 family — an 18 mm body with a 1 or 2 mm range and a side-exit cable, used where the cable has to leave along the mounting surface rather than away from it.All are 10 – 30 V DC, 3-wire, NPN or PNP, with 2 m cable. The small bodies are stainless steel; the M12 bodies are nickel-plated copper with a PBT face.

Application scenarios

Inside a pneumatic gripper body

A 15 mm φ4 barrel sits in the jaw bore and confirms the finger closed on the part, with the cable leaving through the existing channel.

Between a cylinder and its load

Short M8 bodies detect the cylinder at end of stroke where the 45 mm standard body would hit the moving plate.

Tool-presence in a turret

The M12×22 flush body sits in the turret face and confirms the tool holder is seated before the spindle starts.

Ejector and stripper plate position

Mounted in a pocket in the die shoe, the sensor reports the stripper position through a 2 mm stroke.

Lift and index tables on a rotary dial

Short barrels under the dial plate detect the fixture without a bracket hanging into the tool space.

Industries

General machinery
Automotive
Electronics assembly
Tooling

Technical specifications

Series	LJ03M-D · LJ04M-D · LJ05M-D · LJ6.5M-D · LJ6.5M-Y · LJ8M-D / Y · LJ8C-D · LJ12M-D · LJ12C-D
Body lengths	15 mm (φ3, φ4, M5) · 18 – 22 mm (φ6.5, M8) · 22 mm (M12 flush) · 28 mm (M12 non-flush)
Sensing distance	0.6 – 1.5 mm (φ3 – M5) · 1 – 2 mm (φ6.5) · 1 – 2 mm (M8) · 2 – 4 mm (M12)
Mounting	Flush, except the C-suffix M8 and M12 bodies
Housing / face	Stainless steel (small bodies), nickel-plated copper (M12), PA66 or PBT face
Operating voltage	10 – 30 V DC
Switching frequency	2 kHz down to 1 kHz
Repeat accuracy	< 3.0 % (Sr), < 5.0 % (Sr) on the longer M12 ranges
Output	NPN / PNP, NO / NC — N, N2, P, P2 suffix
Protection	IP67
Current consumption	≤10 mA
Output current	≤200 mA
Voltage drop	≤1.5 V
Hysteresis	≤0.05 mm of the sensing distance
Circuit protection	Short-circuit, overload, reverse polarity
Cable	2 m PVC, 3 × 0.2 mm², oil-resistant

Dimensions

Item	Value
Sensing face	Ø6.5 mm, front
Cable	Ø3 mm, 3-core
Mounting	Flush in a Ø6.5H7 bore, retained by the cable gland or a clamp

The 18 mm body is the shortest in the range and is meant to be sunk into a plate: only the Ø6.5 face shows above the surface.

Wiring & output

Lead	Colour
2	Blue
3	Black
—	Two-wire types

How to specify

01
Choose shielded or unshielded
A shielded (flush) sensor can be embedded in metal with only its face exposed, at about 60 % of the unshielded range. An unshielded sensor needs a free zone around the barrel but reaches further.
02
Size the sensing distance
Order at least 1.5 × the nominal distance to allow for tolerances, temperature and target material. Non-ferrous targets — brass, aluminium, copper, stainless — reduce the distance to roughly 30–50 %.
03
Match the target size
The target should be at least as large as the sensing face. A smaller target reduces the distance proportionally, so a 4 mm target on an M18 sensor will not switch at 5 mm.
04
Pick the output and the body
NPN / PNP, NO / NC, 3-wire or 2-wire. Plastic barrel for general use, stainless for weld fields, PTFE-faced for weld spatter, high-temperature types up to 120 °C.

Why this series

15 mm overall, cable included in the drawing

The φ3 and M5 bodies are 15 mm long in total, so they fit between a cylinder and the jaw it drives without a right-angle bracket.

Switching frequency kept at 2 kHz

Shortening the body does not cost speed on the small sizes — the 0.6 mm φ3 version still switches at 2 kHz.

Same wiring as the standard family

Three wires, 10 – 30 V DC, NPN or PNP: an ultra-short body drops into an existing circuit without a new input card.

M8 and M12 in both lengths

The D versions are 18 – 28 mm; pick M12×22 flush when the hole is shallow and M12×28 non-flush when you need the 4 mm range.

Questions

How is the length measured?

Overall body length including the threaded section but excluding the cable and the boot. The sensing face is at one end, the cable exit at the other.

Can a short body be mounted in a through-hole?

Yes for the flush versions — the barrel is threaded over its full length, so it can be clamped from either side of a plate.

Do I lose sensing distance?

No. The D and Y versions use the same coil and circuit as the standard body of the same diameter; only the housing is shorter.

Need a quotation for Ultra-Short Inductive?

Send your application details or the guard opening dimensions and we will specify the right model and configuration for your machine.