{"product_id":"magnetic-float-sensor-fs37a-vertical","title":"Magnetic Float Sensor FS37A (Vertical)","description":"\u003cmeta name=\"description\" content=\"Buy Magnetic Float Sensor FS37A Vertical online in India at best price from The Tech Depot, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\u003ch1\u003eMagnetic Float Sensor FS37A (Vertical)\u003c\/h1\u003e\n\u003cp\u003eReliable vertical-mount magnetic float sensor for precise liquid level detection. The FS37A uses a magnetic reed switch mechanism to provide clean, accurate switching as the float rises and falls with the liquid surface - ideal for water tanks, sumps, aquariums, and automated fluid management systems.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eMagnetic Reed Switch Float Sensor (Vertical Mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eFS37A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Orientation\u003c\/td\u003e\n\u003ctd\u003eVertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitch Type\u003c\/td\u003e\n\u003ctd\u003eNormally Open (NO) - closes when float rises\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e10W max (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Voltage\u003c\/td\u003e\n\u003ctd\u003eUp to 100V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Current\u003c\/td\u003e\n\u003ctd\u003eUp to 0.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;=10mOhm\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\u003ctr\u003e\n\u003ctd\u003eStem Material\u003c\/td\u003e\n\u003ctd\u003eStainless Steel \/ Plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10 degreesC to +85 degreesC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e~30-50 cm (varies by batch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiquid Compatibility\u003c\/td\u003e\n\u003ctd\u003eWater and non-corrosive liquids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eThreaded vertical mount with nut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal\/Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhy Choose the FS37A?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple \u0026amp; Reliable:\u003c\/strong\u003e No electronics inside the sensor - the magnetic reed switch provides dependable, bounce-free operation with no power consumption at idle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Vertical Installation:\u003c\/strong\u003e Threaded stem mounts through a tank wall or lid with included nut for secure, leak-resistant fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrocontroller Friendly:\u003c\/strong\u003e Two-wire output connects directly to Arduino, ESP32, Raspberry Pi, or any digital input - just add a pull-up resistor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Resistance:\u003c\/strong\u003e Polypropylene float withstands water, mild chemicals, and common household liquids without degradation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Small enough for aquariums and hobby projects, robust enough for overhead water tanks and industrial sumps\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e100% authentic from trusted suppliers\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1-5 day shipping, 7-8 day delivery from Bengaluru warehouse\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eExpert technical support included\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThe FS37A consists of a fixed stem containing a magnetic reed switch and a buoyant float with an embedded magnet. When the liquid level rises, the float slides upward along the stem, bringing the magnet close to the reed switch and causing it to close (conduct). When the level drops, the float descends, the magnet moves away, and the switch opens. This provides a simple HIGH\/LOW signal indicating whether the liquid has reached the sensor's trigger point.\u003c\/p\u003e\n\n\u003ch2\u003eProject Ideas\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Water Tank Controller:\u003c\/strong\u003e Mount in your overhead or underground tank to trigger a pump on\/off based on water level - use two sensors for high and low thresholds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium Auto Top-Off:\u003c\/strong\u003e Detect evaporation-driven water level drops and automatically activate a dosing pump to maintain consistent water levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSump Pit Overflow Alert:\u003c\/strong\u003e Install in a basement sump pit to send alerts via buzzer or IoT notification (ESP8266\/ESP32) when water rises to dangerous levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoffee Machine \/ Beverage Dispenser:\u003c\/strong\u003e Monitor reservoir levels and display refill warnings on an LCD or trigger automatic refilling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydroponics \u0026amp; Irrigation:\u003c\/strong\u003e Maintain nutrient solution levels in hydroponic reservoirs or detect when irrigation tanks need refilling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIoT Water Monitoring Dashboard:\u003c\/strong\u003e Pair with an ESP32 and Blynk\/ThingSpeak to remotely monitor tank levels from your phone with historical logging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLearning \u0026amp; Education:\u003c\/strong\u003e Excellent hands-on component for teaching digital inputs, pull-up resistors, interrupt-driven programming, and sensor interfacing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWiring Guide\u003c\/h2\u003e\n\u003cp\u003eThe FS37A has two wires (no polarity). Connect one wire to a GPIO pin on your microcontroller and the other to GND. Enable the internal pull-up resistor on your GPIO pin (or add an external 10kOhm pull-up to VCC). When the float is down (low liquid), the switch is open and the pin reads HIGH. When the float rises (high liquid), the switch closes and the pin reads LOW.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eArduino Example:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWire 1 -\u0026gt; Digital Pin 2\u003c\/li\u003e\n\u003cli\u003eWire 2 -\u0026gt; GND\u003c\/li\u003e\n\u003cli\u003eEnable INPUT_PULLUP on Pin 2 in code\u003c\/li\u003e\n\u003cli\u003edigitalRead(2) returns LOW when liquid level is high\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Magnetic Float Sensor FS37A\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy Magnetic Float Sensor FS37A (Vertical) Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eMagnetic Float Sensor FS37A (Vertical)\u003c\/strong\u003e online at \u003ca href=\"https:\/\/thetechdepot.in\"\u003eThe Tech Depot\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eMagnetic Float Sensor FS37A (Vertical)\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eMagnetic Float Sensor FS37A (Vertical)\u003c\/strong\u003e at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"The Tech Depot","offers":[{"title":"Default Title","offer_id":48746541875457,"sku":"TTD-17519","price":131.44,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/1577\/3185\/files\/355b4e869b2367e37699c2e8cdfb3e0d.jpg?v=1778107186","url":"https:\/\/techdepot.in\/products\/magnetic-float-sensor-fs37a-vertical","provider":"Tech Depot India","version":"1.0","type":"link"}