{"product_id":"radiomaster-ers-rb01-tachometer","title":"RadioMaster ERS-RB01 RPM-BLDC Brushless Tachometer Sensor for ExpressLRS PWM Receivers (CRSF\/EdgeTX)","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe RadioMaster ERS-RB01 is a brushless tachometer (RPM-BLDC sensor) designed to measure motor RPM by tapping directly into any two wires of a brushless ESC output. It captures real-time RPM data, sends it to a compatible ExpressLRS PWM receiver via the CRSF interface, and relays telemetry back to an EdgeTX radio for live monitoring.\u003c\/p\u003e\u003cp\u003eAs part of the ERS sensor family, the ERS-RB01 supports daisy chain expansion (linear, pass-through) for scalable telemetry when using multiple ERS sensors.\u003c\/p\u003e\u003ch2\u003eLaunch Video\u003c\/h2\u003e\u003cp\u003e\u003ciframe height=\"759\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I\" title=\"\" width=\"1349\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate RPM monitoring:\u003c\/strong\u003e Real-time monitoring of brushless RPM data\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpressLRS integration:\u003c\/strong\u003e Works with compatible ExpressLRS receivers via CRSF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug and play:\u003c\/strong\u003e Plug-and-play with supported receivers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-unit support:\u003c\/strong\u003e Multiple ERS-RB01 sensors can be used to monitor several units simultaneously (set RPM ID when using more than one RPM sensor)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDaisy chain expansion:\u003c\/strong\u003e Pass-through expansion for additional telemetry modules\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and lightweight:\u003c\/strong\u003e 28 x 12 x 8 mm; 4.8 g\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor setup help, compatibility questions, or replacement accessories, contact support@rcdrone.top or visit https:\/\/rcdrone.top\/.\u003c\/p\u003e\u003ch2\u003eCompatible ExpressLRS PWM Receivers\u003c\/h2\u003e\u003ch3\u003ePlug and Play\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eER6 2.4GHz ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8 2.4GHz ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8G ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8GV ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eAdapter Required\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eER4\u003c\/li\u003e\n\u003cli\u003eER5C-i\u003c\/li\u003e\n\u003cli\u003eER5A\u003c\/li\u003e\n\u003cli\u003eER5C\u003c\/li\u003e\n\u003cli\u003eER6G\u003c\/li\u003e\n\u003cli\u003eER6GV\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eUsing Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers\u003c\/h2\u003e\u003cp\u003eMost PWM ExpressLRS receivers are compatible. Receivers without an available UART port require reconfiguration to support external sensors: reassign two PWM output pins as a serial UART (one TX and one RX) using the receiver Web UI (WiFi mode) or the ExpressLRS LUA script. This enables sensor connectivity while preserving remaining PWM channels for servos or ESCs.\u003c\/p\u003e\u003cp\u003eFor receivers that only provide standard servo pins, an optional adapter cable can be used to convert the sensor UART connector to two standard servo plugs (TX and RX).\u003c\/p\u003e\u003ch2\u003eSensor Configuration \u0026amp; Telemetry Logging\u003c\/h2\u003e\u003cp\u003eTo configure the sensor and view telemetry on an EdgeTX radio, install the RadioMaster Sensor Configurator LUA. It enables sensor settings adjustments, proper telemetry display, and data logging.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCopy LUA files to: \u003ccode\u003e\/SCRIPTS\/TOOLS\/\u003c\/code\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor poles must be set\u003c\/strong\u003e for accurate RPM data (motor pole pairs are LUA configurable).\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eExample configurator items visible in the tool include: \u003ccode\u003eLED ONOFF\u003c\/code\u003e, \u003ccode\u003eSENSOR POWER\u003c\/code\u003e, \u003ccode\u003eREBOOT\u003c\/code\u003e, \u003ccode\u003eSet RPM ID\u003c\/code\u003e, \u003ccode\u003eMoto poles\u003c\/code\u003e, \u003ccode\u003eSET RATE OFFSET\u003c\/code\u003e, \u003ccode\u003eRESET CONFIG\u003c\/code\u003e.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eItem\u003c\/td\u003e\n\u003ctd\u003eERS-RB01 RPM-BLDC Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\n\u003ctd\u003e5–8.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating current\u003c\/td\u003e\n\u003ctd\u003e10 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement method\u003c\/td\u003e\n\u003ctd\u003eContact type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003ctd\u003eBrushless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor pole pairs\u003c\/td\u003e\n\u003ctd\u003eLUA configurable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e200–300,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e−10 °C to +85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e28 x 12 x 8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.8 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eDownloads\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/ERS-RB01-1.4.pdf?v=1769666610\" rel=\"noopener\" target=\"_blank\"\u003eERS-RB01 User Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/SENSOR_LUA.zip?v=1769595857\" rel=\"noopener\" target=\"_blank\"\u003eRadioMaster ERS Sensors Configurator.lua\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/ERS_Sensors_V1.9.bin?v=1778047269\" rel=\"noopener\" target=\"_blank\"\u003eERS Series Sensors Firmware V1.9\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 x ERS-RB01 RPM-BLDC Sensor\u003c\/li\u003e\n\u003cli\u003e3 x Heat-shrinkable tube\u003c\/li\u003e\n\u003cli\u003e1 x Manual QR code card\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"RadioMaster ERS-RB01 RPM-BLDC brushless tachometer sensor module for ExpressLRS PWM receivers (CRSF)\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible.jpg?v=1780653188\"\u003e\u003cp\u003eAdd live brushless motor RPM telemetry to an ExpressLRS PWM setup over CRSF, with simple plug-and-play wiring.\u003c\/p\u003e\n\u003cimg alt=\"EdgeTX RadioMaster Sensor Configurator menu for RPM sensor settings, including motor poles and RPM ID\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_e092c9cf-c7ff-4012-86a7-b7fa6c72d6da.jpg?v=1780653195\"\u003e\u003cp\u003eUse the RadioMaster Sensor Configurator LUA on EdgeTX to set motor poles and tune sensor options for accurate RPM.\u003c\/p\u003e\n\u003cimg alt=\"RadioMaster Sensor Configurator screen highlighting Set RPM ID option for multiple RPM-BLDC sensors\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_bdd71c11-7fb1-4f55-ada6-d68ef7b21fc9.jpg?v=1780653207\"\u003e\u003cp\u003eWhen running more than one RPM sensor, assign a unique RPM ID so each motor’s telemetry stays separated.\u003c\/p\u003e\n\u003cimg alt=\"ERS sensor family linear daisy-chain layout showing multiple sensors connected pass-through for scalable telemetry\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_c59f78af-e675-4222-9afb-e100f09d5a3d.jpg?v=1780653217\"\u003e\u003cp\u003eLinear daisy-chain pass-through makes it easy to expand telemetry by adding more ERS sensors in series.\u003c\/p\u003e\n\u003cimg alt=\"ERS-RB01 connected for real-time brushless RPM telemetry displayed on an EdgeTX radio screen\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_ee448f74-44c5-457f-b3aa-e887f6a69ff1.jpg?v=1780653226\"\u003e\u003cp\u003eReal-time RPM readouts display directly on the radio, making it easier to monitor performance during setup and flight.\u003c\/p\u003e\n\u003cimg alt=\"ExpressLRS PWM receiver compatibility chart for ERS-RB01 plug-and-play or adapter-required UART connection\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_4f029391-e2ba-46d4-addc-c52003db2ec3.jpg?v=1780653236\"\u003e\u003cp\u003eCompatible with most ExpressLRS PWM receivers; some builds may require UART pin reassignment or an adapter cable.\u003c\/p\u003e\n\u003cimg alt=\"RadioMaster ERS-RB01 specifications table with voltage, current, RPM range, accuracy, size, and weight\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_700a16ba-b6a1-444e-ac40-41276ff04750.jpg?v=1780653246\"\u003e\u003cimg alt=\"Close-up of ERS-RB01 RPM-BLDC sensor showing compact 28×12×8 mm size and connector layout\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_a499a1bd-bba9-43c8-abef-408e53c92434.jpg?v=1780653255\"\u003e\u003cimg alt=\"ERS-RB01 RPM-BLDC sensor on a scale showing 4.8 g weight with attached cable and connector\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_17ee0ef9-4ceb-4173-82fe-629f76438dad.jpg?v=1780653265\"\u003e\u003cimg alt=\"Package contents for ERS-RB01: RPM-BLDC sensor, manual QR code card, and heat-shrink tubing (3 pcs)\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-RB01---Brushless-Tachometer-for-Compatible_03e9b7f2-735f-45b5-9471-bdbdef8beba0.jpg?v=1780653274\"\u003e\u003cp\u003eEverything needed to start includes the sensor module, a QR code manual card, and heat-shrink tubing for a clean install.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RadioMaster","offers":[{"title":"Default Title","offer_id":52969668772064,"sku":"RM0157.ERS-RB01-1","price":28.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/1_f4002142-914e-42a5-9d23-f5fc2d06f551.jpg?v=1780586223","url":"https:\/\/rcdrone.top\/ko\/products\/radiomaster-ers-rb01-tachometer","provider":"RCDrone","version":"1.0","type":"link"}