Pro-Range CLJ-A30M-10ANB NPN M30 Inductive Proximity Sensor - 10mm Detection

The CLJ-A30M-10ANB features an NPN (sinking) output. This means the output transistor switches the signal wire to ground (0V) when a metal target is detected. It is typically wired to a PLC's digital input configured for a sinking (NPN) signal. PNP (sourcing) sensors, in contrast, switch the output to the positive supply voltage when active.

This sensor detects conductive metals, including ferrous metals like steel and iron, as well as non-ferrous metals like aluminum, copper, and brass. The effective sensing distance of 10mm is specified for standard mild steel (Fe360); for other metals, the sensing distance may be reduced due to different electromagnetic properties.

Typically, the brown wire connects to the positive DC supply voltage (commonly 10-30V DC), the blue wire connects to the negative/common (0V), and the black wire is the NPN output signal. The black wire sinks current to ground when activated and should be connected to your controller's digital input. Always ensure polarity is correct to utilize the built-in protection features.

Yes, it can be used for rotational speed sensing by detecting passing metal teeth on a gear or key on a shaft. Its fast response time makes it suitable for such applications. The NPN output provides a clean digital pulse for each detected target, which can be counted or timed by a microcontroller, PLC, or frequency counter to calculate RPM.