M18/L=50mm Hall effect magnetic proximity sensor - NPN/PNP (all polarity)
✨Features
Product Introduction
The M18 Magnetic Proximity Sensor (Full Thread) is a heavy-duty position detection solution. While it shares the same 10mm sensing range (for NdFeB magnets) as smaller models, its primary advantage lies in its mechanical robustness. The larger M18 housing allows for higher tightening torques and a more secure fit in heavy machinery.
This model is "Omnipolar," meaning it activates regardless of which magnetic pole is presented. It draws minimal power (<= 10mA) and features a fully shielded, flush-mountable design. With its 50mm fully threaded body and reinforced 5.0mm PUR cable, it is specifically engineered for harsh applications such as outdoor gates, lift systems, and heavy conveyor lines where physical durability is a priority.
Size and Structure
Circuit diagram
| Parameter | Specification |
|---|---|
| Product Type | Magnetic Proximity Sensor (Hall Effect) |
| Housing Structure | Cylindrical Threaded |
| Thread Size | M18 x 1 |
| Dimensions | Length 50 mm |
| Usable Thread Length | 50 mm (Full Thread) |
| Mounting | Flush (Embedded) |
| Sensing Distance (Sn) | 10 mm (Standard NdFeB Magnet) |
| Polarity Detection | N Pole & S Pole (Omnipolar) |
| Operating Voltage | 10 ... 30 VDC |
| Load Current | <= 200 mA |
| Current Consumption | <= 10 mA |
| Voltage Drop | <= 2 V |
| Switching Frequency | 1000 Hz |
| Hysteresis | 1 ... 15% (of Sr) |
| Repeat Accuracy | <= +/- 5% (of Sr) |
| Protection Circuit | Short-circuit, Reverse Polarity, Surge Protection |
| Connection | Cable 2m (PUR Material), Diameter 5.0mm |
| Housing Material | Nickel-Plated Brass |
| Sensing Face | PBT |
| Ambient Temperature | -25 C ... +80 C |
| Protection Degree | IP67 |
| Accessories | 2 x Fixing Nuts |
| Weight | 125g |
FAQ
Q：This sensor has a 10mm range, same as the M12 version. Why should I choose the larger M18?
A：Mechanical Strength. The M18 housing is much thicker and stronger. It can withstand higher physical impact, vibration, and tightening torque than an M12 sensor. If your machine is heavy-duty or subject to rough handling, the M18 is the safer choice to prevent physical damage to the sensor.
Q：I noticed the cable is 5.0mm thick. Is that standard?
A：Standard sensor cables are usually 3mm or 4mm. This model uses a Heavy-Duty 5.0mm PUR cable. This extra thickness provides better insulation and mechanical protection, making it less likely to snap or wear out in dynamic (moving) applications like cable tracks (drag chains).
Q：What is the advantage of the "Full Thread" (50mm) design?
A：Many sensors have a smooth "cap" at the back. A Full Thread design allows the mounting nuts to travel the entire length of the sensor. This gives you the flexibility to mount the sensor on very thick brackets or to adjust the sensor's position forward and backward by a large margin to fine-tune the gap between the sensor and the magnet.
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