{"product_id":"proximity-sensor-8mm-npn-no-inductive-switch-for-metal-detection","title":"Proximity Sensor 8mm NPN NO - Inductive Switch for Metal Detection","description":"\u003ch1\u003e8mm NPN NO Inductive Proximity Sensor – Reliable Metal Detection\u003c\/h1\u003e\u003cp\u003eThis is an 8mm inductive proximity sensor with an NPN normally open (NO) output. It detects metal objects without physical contact, making it ideal for automation, robotics, and industrial control systems. The sensor operates on a wide 5–30V DC supply and outputs a low signal when metal enters its 8mm sensing range, providing a simple interface with microcontrollers and PLCs.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5–30 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eNPN Normally Open (NO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensing Distance\u003c\/td\u003e\n\u003ctd\u003e8 mm (for mild steel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd\u003e500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-25°C to 70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003e3-wire (Brown: V+, Blue: GND, Black: Output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAutomated part counting on a conveyor belt\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/raspberry-pi-5-ai-robot-arm-kit-with-ewc-for-education-analytics\"\u003eMetal object sorting robot arm\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eLiquid level indicator using a metal float\u003c\/li\u003e\n\u003cli\u003eDIY speedometer by detecting gear teeth\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis sensor works with any 5V or higher DC supply and is directly compatible with Arduino, ESP32, PLCs, and other microcontrollers. The NPN open-collector output requires a pull-up resistor (commonly 10kΩ) to read the signal; many boards have internal pull-ups you can enable. For 3.3V logic systems, use a level shifter or voltage divider to safely interface the output.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the brown wire to V+ (5–30V DC), blue to GND, and black to a digital input pin. The output goes low when metal is detected, so enable a pull-up resistor to see a clean HIGH\/LOW change. Current draw is minimal, making it safe for battery-powered projects.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery 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.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, connect brown to 5V, blue to GND, black to any digital pin, and enable the pin's internal pull-up resistor in your code. No external components needed.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan it detect stainless steel?\u003c\/summary\u003e\u003cp\u003eYes, but the sensing distance may reduce for non-mild steels. It works best with ferrous metals; for non-ferrous, the detection range may be slightly shorter.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat does NPN NO mean?\u003c\/summary\u003e\u003cp\u003eNPN means the output transistor sinks current to ground when active, and NO (normally open) means the output is high (floating) when no metal is detected and goes low when metal triggers it.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery 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.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445009211757,"sku":"CDN-0670","price":370.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_0ccf7c3f-bf71-493b-8cae-fe1f6a2e60e6.jpg?v=1781512790","url":"https:\/\/compoden.com\/products\/proximity-sensor-8mm-npn-no-inductive-switch-for-metal-detection","provider":"Compoden","version":"1.0","type":"link"}