{"product_id":"float-sensor-switch-for-water-level-controller-compoden","title":"Float Sensor Switch for Water Level Controller - Compoden","description":"\u003ch1\u003eFloat Sensor Switch For Water Level Controller\u003c\/h1\u003e\n\u003cp\u003eA magnetic reed float switch that detects liquid levels in tanks and reservoirs. It closes a circuit when the float rises with water level, making it ideal for automatic pump control, overfill prevention, and level monitoring with microcontrollers like Arduino.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\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\u003eSwitch Type\u003c\/td\u003e\n\u003ctd\u003eMagnetic Reed (Normally Open)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Voltage\u003c\/td\u003e\n\u003ctd\u003e100V DC\/AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaximum Current\u003c\/td\u003e\n\u003ctd\u003e0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e30 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFloat Material\u003c\/td\u003e\n\u003ctd\u003ePolypropylene (PP)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-water-tank-level-monitor-kit-v2\"\u003eAutomatic overhead tank pump controller that starts and stops based on water level.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-water-level-alarm\"\u003eSump overflow alarm system using an Arduino to send alerts when water reaches a danger level.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-aquarium-auto-top-off\"\u003eAquarium auto top-off device to maintain water level by triggering a small pump.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-rainwater-harvesting-controller\"\u003eRainwater harvesting monitor that logs tank levels to the cloud via ESP32.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis float switch outputs a simple closed\/open signal, working with any microcontroller that reads digital inputs, such as Arduino Uno, ESP8266, and Raspberry Pi Pico. Use a 5V–12V DC supply for signal circuits. Always add a 10kΩ pull-down resistor from the input pin to GND to prevent floating readings when the switch is open.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect one wire of the float switch to a digital input pin and the other to GND. Place a 10kΩ pull-down resistor between the input pin and GND so the pin reads LOW when the switch is open. When the float rises and closes the circuit, the pin goes HIGH. The switch is rated for signals only—use a relay module if you need to drive a pump or motor.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\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\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect one wire to a digital pin with a 10kΩ pull-down resistor to GND, and the other wire to GND. Use digitalRead() to detect water level—HIGH means the float is up and the switch is closed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this switch directly control a water pump?\u003c\/summary\u003e\u003cp\u003eNo, the contacts are rated for 0.5A maximum, which is too low for most pumps. It should be used as a sensor to trigger a relay, MOSFET, or motor driver that handles the pump’s current.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the switch normally open or normally closed?\u003c\/summary\u003e\u003cp\u003eThis float sensor is normally open (NO). The circuit closes when the float rises with water level. If you need a normally closed behavior, you can invert the logic in your code or wire a pull-up resistor instead.\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":53445102535021,"sku":"CDN-0329","price":110.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_4676eaf9-f832-40b9-9326-bac40a39a712.jpg?v=1781513314","url":"https:\/\/compoden.com\/products\/float-sensor-switch-for-water-level-controller-compoden","provider":"Compoden","version":"1.0","type":"link"}