Photoelectric Proximity Sensor M18 PNP NO – Industrial Detection
M18 Photoelectric Proximity Sensor – PNP NO
The M18 photoelectric proximity sensor provides non-contact object detection for industrial automation, making it ideal for conveyor systems, packaging machines, and robotic applications. Its PNP normally open output switches positive voltage when an object is detected, offering simple integration with PLCs and controllers. With a rugged nickel-plated brass housing and IP67 rating, it withstands harsh environments and ensures long-term reliability.
Key Specifications
| Specification | Value |
|---|---|
| Sensing Method | Diffuse reflective (adjustable) |
| Sensing Range | 5 – 30 cm (adjustable via potentiometer) |
| Output Type | PNP, Normally Open (NO) |
| Supply Voltage | 10 – 30V DC |
| Max Load Current | 200 mA |
| Housing & Protection | Nickel-plated brass, IP67 |
What You Can Build With This
- Automated conveyor belt object counter using a microcontroller and display
- Liquid level sensing system for tanks with relay-controlled pumps
- Sorting machine that separates items by presence or absence on a production line
- Obstacle detection for autonomous robots or AGVs in industrial workshops
Compatibility
This sensor works directly with 24V industrial PLCs and controllers that accept PNP inputs. For use with 5V microcontrollers like Arduino, a level-shifting circuit or relay module is required because the output swings to the supply voltage. It pairs well with motor drivers, solenoid valves, and indicator lamps in automation panels.
Wiring Notes
Connect brown wire to positive supply (10–30V DC), blue wire to ground, and black wire to the load or controller input. Since this is a PNP NO sensor, the black wire outputs supply voltage when an object is detected. Always include a pull-down resistor (10kΩ to ground) if interfacing with logic-level circuits to prevent floating states.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, but requires a voltage divider or optocoupler because the sensor outputs 10-30V, while Arduino inputs tolerate only 5V. A simple resistor divider (e.g., 10kΩ + 20kΩ) can safely step down the signal.
Can I use this sensor outdoors or in dusty environments?
Absolutely. The IP67 rating means it is dust-tight and can withstand temporary immersion in water, making it suitable for outdoor and washdown applications.
What is the difference between PNP and NPN output?
A PNP output sources current to the load (switches positive), common in European automation. NPN sinks current (switches negative), more common in Asian markets. Choose the type that matches your controller’s input specification.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items