Inductive Proximity Sensor/Switch M12

Inductive proximity sensor M12 thread NPN PNP Normally Closed Open

Description

The operation theory of this type of sensors is based on electromagnetic induction, when metal object approaches sensor, eddy currents generated inside sensor will cause the oscillation circuit to decay, thereby triggering the switch signal. Inductive proximity switch are mainly composed of oscillators, detection coils (generating alternating magnetic fields ) signal processing circuits and output stages.

The oscillator generates high-frequency alternating current, creating an alternating magnetic field around the detection coil. When a metal object enters the magnetic field, it will generate eddy currents (for non-magnetic metals) or hysteresis losses (for magnetic metals) due to electromagnetic induction. Eddy currents or hysteresis effects will absorb oscillation energy, resulting in magnetic field attenuation, oscillation weakening, or cessation. This change is detected by the subsequent circuit and converted into an electrical signal. The signal processing circuit compares the degree of energy attenuation with a preset threshold and drives the output stage (such as a transistor or thyristor) to switch the switch state (on/off).

VALUE TO CUSTOMERS

• Higher durability:

• Optimized product structure, minimize service cost.
• High performance design redundancy, minimize issue of after sales service.

Features

• Output high low voltage levels
• Low power consumption 3-15mA
• -30℃-125℃
• Threaded design for easy installation
• Working frequency range:0Hz-5KHz
• Supply voltage range: DC4.5V-DC 36V
• Strong electrical noise immunity, EMC EN IEC 61000-6-4:2019/EN IEC 61000-3-2:2019+A1:2021/EN 61000-6-2:2019
• Robust resistance to vibration: IEC60068-2-64-2019

Application

• Rotary Speed measurement
• Position measurement
• Proximity measurement

ELECTRICAL SPECIFICATIONS
CHARACTERISTIC	PARAMETER
	YULI-M12DG-NPN-55-3-NC	YULI-M12DG-NPN-55-3-NO	YULI-M12DG-PNP–55-3-NC	YULI-M12DG-PNP–55-3-NO
Supply Voltage	4.5V-36V
Consumption current	3mA-15mA depends on power supply
Reverse Voltage Protection	-72V
Short Circuit Protection	12V
Signal Type	NPN normally closed, power on,output low level, LED light on when target approach output high level, LED light off	NPN normally open, power on,output high level, LED light off when target approach output low level, LED light on	PNP normally closed, power on,output low level, LED light on when target approach output high level, LED light off	PNP normally open, power on,output high level, LED light off when target approach output low level, LED light on
Signal Output	Φ 4.5mm, conductor 0.2mm² 3-core cable output   Brown: VC   Black: OUT   Blue: GND
High Output Voltage (Voh)	≤(VC-0.3)V
Output low level	≤0.3V
Signal Trigger	Metal gears or metal plates, metal blocks
Working temperature	-30℃-125℃
Working frequency	0 Hz-5K Hz
Cable length	Typical 1000mm
Protection level	IP67

Structural Dimension

Principle

Application 1: Rotary Speed Measurement

Application 2: Proximity Measurement