{"product_id":"kit-open-squid-magnetometer","title":"Open SQUID Magnetometer Kit with Arduino Mega + Sensor","description":"\u003ch1\u003eOpen SQUID Magnetometer Kit with Arduino Mega — Measure Picotesla Magnetic Fluctuations\u003c\/h1\u003e\n\n\u003cp class=\"value-summary\"\u003eEvery part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.\u003c\/p\u003e\n\n\u003cdiv class=\"specs-strip\"\u003e\n  \u003cspan\u003e\u003cstrong\u003eDifficulty:\u003c\/strong\u003e Advanced\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eBuild Time:\u003c\/strong\u003e 12-15 hours\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eAge:\u003c\/strong\u003e 25+\u003c\/span\u003e\n  \u003cspan\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Low-Noise Analog Instrumentation \u0026amp; Precision Magnetic Sensing\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eDetect magnetic field variations as small as a few hundred picotesla — orders of magnitude smaller than the Earth's field — without liquid helium or cryogenic cooling. This kit uses a fluxgate sensor and advanced signal processing to replicate the core capability of a SQUID magnetometer, making ultra-sensitive magnetometry accessible for geophysical surveys, materials research, and experimental physics.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Build\u003c\/h2\u003e\n\u003cp\u003eYou’ll assemble a complete, open-source digital magnetometer. The finished instrument displays real-time magnetic field readings on a 2.4-inch TFT, logs time-stamped data to microSD, and interfaces with a PC for further analysis. The core sensor, an HMC1001 fluxgate, is driven and read out through a low-noise analog front-end built from precision op-amps and a stable voltage reference. A lock-in detection scheme using the AD9833 signal generator extracts picotesla-level signals, while the ADS1115 16-bit ADC digitizes the result with ultra-low noise. All analog circuitry is housed in a mu-metal enclosure to suppress environmental interference.\u003c\/p\u003e\n\n\u003ch2\u003eWhat You'll Learn\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDesign and build a low-noise analog front-end for sub-microvolt signals using LM358 op-amps and stable references\u003c\/li\u003e\n  \u003cli\u003eImplement phase-sensitive detection with a DDS signal generator to recover tiny signals buried in noise\u003c\/li\u003e\n  \u003cli\u003eCalibrate a fluxgate magnetometer and interpret its transfer function with an Arduino Mega\u003c\/li\u003e\n  \u003cli\u003eDevelop embedded software for real-time TFT display, RTC time-stamping, and SD card data logging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eADS1115 ADC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM329 Reference\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM358 Op-Amp\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAD9833 Signal Gen\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFluxgate Sensor HMC1001\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDS3231 RTC\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicroSD Module\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e2.4in TFT ILI9341\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100kΩ Resistors\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e100nF Caps\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePCB Prototype Board\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMu-Metal Enclosure\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSoldering Iron\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSolder Wire\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Buy This Kit Instead of Sourcing Parts Separately\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFactor\u003c\/th\u003e\n\u003cth\u003eSourcing Separately\u003c\/th\u003e\n\u003cth\u003eCompoden Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility checks\u003c\/td\u003e\n\u003ctd\u003eYou verify every part\u003c\/td\u003e\n\u003ctd\u003ePre-tested as a system\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBuild support\u003c\/td\u003e\n\u003ctd\u003eForums and scattered tutorials\u003c\/td\u003e\n\u003ctd\u003eAI companion trained on this exact project\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTime to first working build\u003c\/td\u003e\n\u003ctd\u003eDays of debugging\u003c\/td\u003e\n\u003ctd\u003eHours, with step-by-step guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eShipping coordination\u003c\/td\u003e\n\u003ctd\u003eMultiple sellers, multiple delays\u003c\/td\u003e\n\u003ctd\u003eOne shipment from Bengaluru in 3-5 days\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho This Kit Is For\u003c\/h2\u003e\n\u003cp\u003eThis kit is designed for advanced makers, research scholars, and professionals. Engineering students at IITs, NITs, and BITS Pilani will find it invaluable for final-year projects in instrumentation or applied physics. Smart India Hackathon teams working on geophysical or material characterization challenges can rapidly prototype a high-sensitivity sensor. Physics postgraduates and faculty can demonstrate SQUID principles without cryogenics, and tinkering labs seeking a real scientific instrument for outreach will appreciate its open-source design.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt and Backed by Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eWhat if I get stuck during the build?\u003c\/summary\u003e\u003cp\u003eScan the QR code on the box to launch the AI companion that knows every connection and calibration step. You can also reach out via WhatsApp; we’ll help within hours.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this kit detect the Earth’s magnetic field variations?\u003c\/summary\u003e\u003cp\u003eYes, it is sensitive enough to monitor diurnal variations and even magnetic storms. With proper shielding and calibration, you can record fluctuations on the order of tens of picotesla.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs the mu-metal enclosure essential for operation?\u003c\/summary\u003e\u003cp\u003eWithout it, ambient 50 Hz noise and nearby metal objects will dominate the signal. The included enclosure shields the sensor and analog front-end, ensuring stable, repeatable measurements.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does this compare to a real SQUID magnetometer in a research lab?\u003c\/summary\u003e\u003cp\u003eYou achieve similar sensitivity in the 0.1–100 Hz range without needing liquid helium or a shielded room. While ultimate sensitivity is lower, this kit brings picotesla-level magnetometry to a benchtop at a fraction of the cost and complexity.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003cdiv class=\"kit-description\"\u003e\n  \u003cp\u003eSuperconducting loop equivalent using flux gate sensor. ADS1115 measures picotesla magnetic fluctuations.\u003c\/p\u003e\n  \u003ch4\u003eWhat's in this kit\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/mega-2560-r3-development-board-arduino-compatible-54-io-256kb\"\u003eArduino Mega 2560\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ads1115-16-bit-i2c-adc-module-for-arduino-raspberry-pi\"\u003eADS1115 ADC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eLM329 Reference\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/lm358-op-amp-dual-low-power-operational-amplifier-ic-compoden\"\u003eLM358 Op-Amp\u003c\/a\u003e x6\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ad9833-dds-signal-generator-module-0-125mhz-sinetrianglesquare-wave\"\u003eAD9833 Signal Gen\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eFluxgate Sensor HMC1001\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/ds3231-real-time-clock-module-i2c-rtc-with-battery-backup\"\u003eDS3231 RTC\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/microsd-card-reader-spi-module-for-arduino\"\u003eMicroSD Module\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/elecrow-24inch-esp32-solo-miner-lcd-display\"\u003e2.4in TFT ILI9341\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e100kΩ Resistors x10\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/capacitor-variety-pack-6-values-100nf-to-470uf-30-pieces\"\u003e100nF Caps\u003c\/a\u003e x15\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/products\/esp-wroom-32-breakout-board-pcb-55x52mm\"\u003ePCB Prototype Board\u003c\/a\u003e x5\u003c\/li\u003e\n    \u003cli\u003eMu-Metal Enclosure\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/soldering-kit-25w-with-solder-wire-flux-paste-compoden\"\u003eSoldering Iron\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/products\/soldering-kit-25w-with-solder-wire-flux-paste-compoden\"\u003eSolder Wire\u003c\/a\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in the Open SQUID Magnetometer Kit with Arduino Mega + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Open SQUID Magnetometer Kit with Arduino Mega + Sensor includes all components needed: Arduino Mega 2560, ADS1115 ADC, LM329 Reference, LM358 Op-Amp, AD9833 Signal Gen and more. Everything is pre-tested for compatibility and shipped from Bengaluru, India.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What skill level is required for the Open SQUID Magnetometer Kit with Arduino Mega + Sensor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This kit is designed for Advanced level makers, suitable for ages 25+. Superconducting loop equivalent using flux gate sensor. ADS1115 measures picotesla magnetic fluctuations. Estimated build time is 12-15 hrs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I buy the Open SQUID Magnetometer Kit with Arduino Mega + Sensor online in India?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, the Open SQUID Magnetometer Kit with Arduino Mega + Sensor is available online at Compoden (compoden.in), India's AI-powered electronics and robotics store. Ships from Bengaluru in 1-5 business days across India.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"Product\",\n  \"name\": \"Open SQUID Magnetometer Kit with Arduino Mega + Sensor\",\n  \"description\": \"Superconducting loop equivalent using flux gate sensor. ADS1115 measures picotesla magnetic fluctuations.\",\n  \"sku\": \"CDN-KIT-2195\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"Compoden\"},\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/compoden.in\/products\/kit-open-squid-magnetometer\",\n    \"priceCurrency\": \"INR\",\n    \"price\": \"5330\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": {\"@type\": \"Organization\", \"name\": \"Compoden\"}\n  },\n  \"category\": \"Maker Tools \u0026 Instruments\"\n}\n\u003c\/script\u003e\u003cp\u003e\u003cstrong\u003eChoose your assembly option:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoldering Kit\u003c\/strong\u003e — 25W soldering iron, 60\/40 solder wire, flux, and small perfboard for permanent assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreadboard Combo\u003c\/strong\u003e — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Compoden","offers":[{"title":"Clone \/ Soldering Kit","offer_id":53469333225837,"sku":"CDN-KIT-2195-CL-SLD","price":4700.0,"currency_code":"INR","in_stock":true},{"title":"Clone \/ Breadboard Combo","offer_id":53469333258605,"sku":"CDN-KIT-2195-CL-BB","price":4170.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original \/ Soldering Kit","offer_id":53469333291373,"sku":"CDN-KIT-2195-R3-SLD","price":7130.0,"currency_code":"INR","in_stock":true},{"title":"R3 Original \/ Breadboard Combo","offer_id":53469333324141,"sku":"CDN-KIT-2195-R3-BB","price":6600.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi \/ Soldering Kit","offer_id":53469333356909,"sku":"CDN-KIT-2195-R4-SLD","price":6450.0,"currency_code":"INR","in_stock":true},{"title":"R4 WiFi \/ Breadboard Combo","offer_id":53469333389677,"sku":"CDN-KIT-2195-R4-BB","price":5920.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/kit-open-squid-magnetometer.png?v=1781947832","url":"https:\/\/compoden.com\/products\/kit-open-squid-magnetometer","provider":"Compoden","version":"1.0","type":"link"}