{"product_id":"witmotion-hwt3100-geomagnetic-sensor","title":"WitMotion HWT3100-485 Three-Axis Electronic Compass Geomagnetic Sensor for RS485 Modbus RTU (IP67)","description":"\u003cp\u003e\u003ciframe height=\"753\" src=\"https:\/\/www.youtube.com\/embed\/NDnH0rN5TTo\" title=\"YouTube video player\" width=\"1280\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eWitMotion HWT3100-485 is a three-axis electronic compass geomagnetic sensor designed for 3-axis geomagnetic intensity measurement and heading angle output. It supports RS485 multi-device connection (up to 50 devices simultaneously) and uses Modbus RTU communication for integration into industrial and embedded systems.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e3-axis magnetic field output and heading angle output\u003c\/li\u003e\n\u003cli\u003ePortable fluxgate digital gauss meter design\u003c\/li\u003e\n\u003cli\u003eRS485 multi-device connection: up to 50 multiple connections simultaneously\u003c\/li\u003e\n\u003cli\u003eHigh resolution; one-key reset; magnetic auto-recovery\u003c\/li\u003e\n\u003cli\u003eIP67 protection; high-quality aluminum shell; suitable for harsh environments\u003c\/li\u003e\n\u003cli\u003eSoaking in water can be up to 30 mins (as stated)\u003c\/li\u003e\n\u003cli\u003eEasy to read graphs: simple, visual data review in real time; quickly know data changes\u003c\/li\u003e\n\u003cli\u003eFrom provided description: selectable measurement range and output rate (0.2-100Hz stated); 32-bit processor; SCA3300 temp-compensation MEMS module; RM3100 magnetometer-compensation chip; dynamic fusion algorithm and Kalman Filtering; angle measurement accuracy 0.05 degree (X, Y-axis), low-drift Z-axis angle, automatic data correction, large signal-noise immunity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003eHWT3100 Fluxgate Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWitMotion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel (this listing)\u003c\/td\u003e\n\u003ctd\u003eHWT3100-485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e5V-36V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003eRS485 version: \u0026lt;10mA (TTL version reference: \u0026lt;6mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol\u003c\/td\u003e\n\u003ctd\u003eModbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud rate\u003c\/td\u003e\n\u003ctd\u003e9600 (default), 115200, 460800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eSerial TTL \/ Serial 485\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e-800uT to +800uT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e13nT\/LSB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData output\u003c\/td\u003e\n\u003ctd\u003e0.1Hz-100Hz (TTL), Modbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e-40 C to +85 C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eSensor: 50g; cable (1m, weight: 48g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e83*25*25mm \/ 3.27*0.99*0.99\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e2 x M2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical drawing callouts\u003c\/td\u003e\n\u003ctd\u003e83mm length; 25mm body height; 21.5mm (callout); 40mm (callout); 16mm (callout); 16.2mm (callout)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eBuilt-in Sensor Chips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e2* Sen-XY-f (pn13104) geomagnetic module\u003c\/li\u003e\n\u003cli\u003e1* Sen-Z-f (pn13101) geomagnetic module\u003c\/li\u003e\n\u003cli\u003e1* MagI2C (pn13156) control chip\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eParameter Table (Cycle Counts)\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003e50\u003c\/th\u003e\n\u003cth\u003e100\u003c\/th\u003e\n\u003cth\u003e200\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Measurement Range\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e-800uT to +800uT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e30nT\u003c\/td\u003e\n\u003ctd\u003e20nT\u003c\/td\u003e\n\u003ctd\u003e15nT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGain@3V (LSB\/uT)\u003c\/td\u003e\n\u003ctd\u003e20nT\u003c\/td\u003e\n\u003ctd\u003e38nT\u003c\/td\u003e\n\u003ctd\u003e75nT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinearity over +\/-200uT\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e0.5% (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e50nT\u003c\/td\u003e\n\u003ctd\u003e26nT\u003c\/td\u003e\n\u003ctd\u003e13nT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax 3-Axis Sample Rate\u003c\/td\u003e\n\u003ctd\u003e534uA\u003c\/td\u003e\n\u003ctd\u003e284uA\u003c\/td\u003e\n\u003ctd\u003e147uA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Usage@8Hz, 3Axes\u003c\/td\u003e\n\u003ctd\u003e70uA\u003c\/td\u003e\n\u003ctd\u003e135uA\u003c\/td\u003e\n\u003ctd\u003e260uA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit Oscillation Frequency\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e180kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBias Resistor (RB)\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eInterface (Wire Color \/ PIN Definition)\u003c\/h2\u003e\u003ch3\u003eTTL version interface description (reference)\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003cth\u003ePIN\u003c\/th\u003e\n\u003cth\u003eDefinition\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003eVCC\u003c\/td\u003e\n\u003ctd\u003e5-36V power input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003ctd\u003eRX\u003c\/td\u003e\n\u003ctd\u003eSerial data input, TTL level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYellow\u003c\/td\u003e\n\u003ctd\u003eTX\u003c\/td\u003e\n\u003ctd\u003eSerial data output, TTL level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGround wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003e485 version interface description\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003cth\u003ePIN\u003c\/th\u003e\n\u003cth\u003eDefinition\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRed\u003c\/td\u003e\n\u003ctd\u003eVCC\u003c\/td\u003e\n\u003ctd\u003e5-36V power input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003ctd\u003eDifferential signal 485 communication A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYellow\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003ctd\u003eDifferential signal 485 communication B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003eGround wire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eData Output Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSupports Modbus RTU raw data output.\u003c\/li\u003e\n\u003cli\u003eSerial ASCII code output is shown for the serial version; note: the RS485 version does not support the ASCII output mode.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMagnet\u003c\/li\u003e\n\u003cli\u003eSpeaker\u003c\/li\u003e\n\u003cli\u003eMechanical Part\u003c\/li\u003e\n\u003cli\u003eMagnetic Separator\u003c\/li\u003e\n\u003cli\u003eDC\u003c\/li\u003e\n\u003cli\u003eIron Remover\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSupport \u0026amp; Warranty\u003c\/h2\u003e\u003cp\u003eWarranty: 12-month warranty (as stated). A tutorial link is printed on the guiding card inside the package. For order support, integration questions, or wiring help, contact support@rcdrone.top or visit https:\/\/rcdrone.top\/.\u003c\/p\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"Promotional banner for ultra-high accuracy MEMS IMU solutions for IoT, mapping, and monitoring applications\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass.webp?v=1783261925\"\u003e\u003cimg alt=\"Model selection chart comparing HWT3100 TTL and HWT3100-485 RS485 versions with voltage, current, and protocol\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_74a7f536-2090-4978-8db2-61a529b1d19e.webp?v=1783261931\"\u003e\u003cp\u003eChoose the HWT3100-485 version for RS485 networks using Modbus RTU communication.\u003c\/p\u003e\n\u003cimg alt=\"WitMotion HWT3100 fluxgate geomagnetic sensor with 3-axis magnetic field and heading angle output highlights\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_0ea24564-24a6-47a3-904c-93892a33ce09.webp?v=1783261937\"\u003e\u003cp\u003eThe HWT3100-485 measures 3-axis geomagnetic intensity and outputs heading angle for compass and orientation tasks.\u003c\/p\u003e\n\u003cimg alt=\"IP67 protection graphic showing the aluminum HWT3100 sensor housing with water splash resistance message\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_8f43ce87-8acf-47f0-996c-4dbeed37751d.webp?v=1783261944\"\u003e\u003cp\u003eAn IP67-rated aluminum shell supports use in harsh environments where dust and water exposure are expected.\u003c\/p\u003e\n\u003cimg alt=\"Applications collage showing magnets, speaker, mechanical parts, magnetic separator, DC motor, and iron remover\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_588e4573-be4d-4d73-8306-d6921cdb93cf.webp?v=1783261950\"\u003e\u003cp\u003eSuitable for integration into equipment affected by magnetic fields such as motors, separators, and other industrial assemblies.\u003c\/p\u003e\n\u003cimg alt=\"Magnetic field output demo with sensor in hand and PC dashboard displaying 3-axis magnetic readings and heading\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_d254dcf7-d040-491c-b3ac-5bc49653cdde.webp?v=1783261956\"\u003e\u003cimg alt=\"RS485 multi-device connection diagram with master terminal and multiple slave sensors on A\/B differential bus (up to 50)\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_fed680f1-9f0d-4270-84d8-0be754bee6f4.webp?v=1783261961\"\u003e\u003cp\u003eRS485 multi-drop wiring supports connecting up to 50 sensors on the same bus for scalable deployments.\u003c\/p\u003e\n\u003cimg alt=\"PC software graph interface displaying real-time trend lines for magnetic field channels and related values\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_03bcf1a4-54dd-444b-b641-e26e04ea9745.webp?v=1783261967\"\u003e\u003cimg alt=\"Raw data table screenshot showing serial ASCII output example and note that RS485 version does not support ASCII mode\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_7bb903a4-5626-45d2-b299-c77be123033c.webp?v=1783261974\"\u003e\u003cp\u003eFor HWT3100-485, use Modbus RTU rather than ASCII output mode.\u003c\/p\u003e\n\u003cimg alt=\"Modbus RTU raw data screenshot showing register-style output table for magnetic field readings and heading values\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_f877634f-ad7d-4171-8d9a-22ffbcc839cd.webp?v=1783261982\"\u003e\u003cp\u003eModbus RTU output makes it straightforward to parse readings in PLCs, gateways, and embedded controllers.\u003c\/p\u003e\n\u003cimg alt=\"Advantages comparison graphic contrasting fluxgate sensor module features versus RM3100 chip and discrete solutions\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_0cbc5743-fd60-4a80-8650-42116d3f8fe2.webp?v=1783261991\"\u003e\u003cimg alt=\"Specifications table and mechanical dimensions for WitMotion HWT3100-485, including size 83×25×25 mm and range ±800 µT\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_dfafd1e8-fbeb-44f3-9176-37c217215545.webp?v=1783262000\"\u003e\u003cp\u003eMechanical dimensions and core specs are provided for enclosure planning, mounting, and system power budgeting.\u003c\/p\u003e\n\u003cimg alt=\"Parameter table listing noise, gain, linearity, sensitivity, sample rate, and current usage across cycle count settings\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_8bbc1a28-610a-493b-b9f8-ae421df9a83e.webp?v=1783262009\"\u003e\u003cimg alt=\"Wiring\/pin definition tables for TTL and RS485 versions with wire colors for VCC, A\/B (or RX\/TX), and GND\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_8ac8e1ab-61b3-4b1c-85b8-d1970bd1f4e7.webp?v=1783262018\"\u003e\u003cp\u003eWire color definitions help verify power and communications connections before commissioning.\u003c\/p\u003e\n\u003cimg alt=\"Wiring connection diagrams for TTL, MCU UART, and RS485 interface showing VCC, GND, and signal line routing\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_c545fb3d-2d3d-4dd5-8acc-f01b954f2363.webp?v=1783262027\"\u003e\u003cp\u003eConnection diagrams summarize typical hookups for MCU UART (TTL) and differential RS485 (A\/B) installations.\u003c\/p\u003e\n\u003cimg alt=\"Protocol reference page showing ASCII (AT command) samples and Modbus mode read\/write command frame structure\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_af77e569-f07a-415b-b1b5-abcae658f3b2.webp?v=1783262037\"\u003e\u003cimg alt=\"Development kits graphic listing included resources: manual, PC software, and sample code\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/WitMotion-HWT3100-485-Three-axis-electronic-compass_7f5220b5-7934-4fb0-9f77-8107809a9bba.webp?v=1783262046\"\u003e\u003cp\u003eDocumentation, PC tools, and sample code support faster setup and integration.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"WitMotion","offers":[{"title":"HWT3100-TTL","offer_id":53304131453152,"sku":"HWT3100-TTL-1","price":72.72,"currency_code":"USD","in_stock":true},{"title":"HWT3100-485","offer_id":53304131485920,"sku":"HWT3100-TTL-2","price":72.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/3100.jpg?v=1783260801","url":"https:\/\/rcdrone.top\/zh\/products\/witmotion-hwt3100-geomagnetic-sensor","provider":"RCDrone","version":"1.0","type":"link"}