{"product_id":"ers-rb01-brushless-tachometer-for-compatible-expresslrs-pwm-receivers","title":"ERS-RB01 - Brushless Tachometer for Compatible ExpressLRS PWM Receivers","description":"\u003cp\u003eThe ERS-RB01 Brushless Tachometer measures RPM by tapping directly into any two wires of a brushless ESC output. The sensor captures precise speed data, sends it to a compatible ExpressLRS receiver via the CRSF interface, and relays the information back to your EdgeTX radio for real-time monitoring. Ideal for any application requiring accurate RPM feedback.\u003c\/p\u003e\u003cp\u003eAs part of the ERS sensor family, the ERS-RB01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.\u003c\/p\u003e\u003cp style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/1_184e7f76-6550-4c1c-9789-5585dbbd3dac.jpg?v=1769581148\"\u003e\u003c\/p\u003e\u003ch2\u003eLaunch Video\u003c\/h2\u003e\u003cp\u003e\u003ciframe width=\"1349\" height=\"759\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003ch2\u003e\u003cspan data-type=\"text\"\u003eFeatures\u003c\/span\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate RPM Monitoring: \u003c\/strong\u003eCaptures real-time brushless speed with high precision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpressLRS Integration:\u003c\/strong\u003e Sends RPM data directly to compatible ExpressLRS receivers via the CRSF interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Unit Support:\u003c\/strong\u003e Connect multiple ERS-RB01 sensors to monitor several units simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Ideal for any application requiring accurate RPM feedback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Easy to install without adding significant weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play:\u003c\/strong\u003e Quick setup with minimal wiring for fast deployment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003ePlug and Play Compatible Receivers:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cli\u003e\n\u003cli\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cspan data-type=\"text\"\u003eUsing Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers:\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan data-type=\"text\"\u003eMost PWM ExpressLRS receivers are fully compatible; those without a dedicated UART port require reconfiguration to support external sensors (e.g., for telemetry). To enable this, reassign two PWM output pins as a serial UART—one for TX and one for RX—via the receiver's Web UI (accessed by putting the receiver into WiFi mode) or via the ExpressLRS LUA script. This enables sensor connectivity while preserving the remaining PWM channels for servos or ESCs.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan data-type=\"text\"\u003eFor receivers that only provide standard servo pins, an optional adapter cable is available that converts the sensor’s UART connector to two standard servo plugs (TX and RX). Available here: \u003c\/span\u003e\u003c\/p\u003e\u003ch3\u003e\u003cspan data-type=\"text\"\u003eSensor Configuration \u0026amp; Telemetry Logging\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan data-type=\"text\"\u003eTo configure this sensor and view telemetry on your EdgeTX radio, install the RadioMaster Sensor Configurator LUA. The LUA allows adjustment of sensor settings, enables proper telemetry display, and supports data logging for post-flight review.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan data-type=\"text\"\u003eAfter downloading, connect your radio to a Mac or PC in USB-SD mode.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan data-type=\"text\"\u003eCopy the LUA files to:\u003cbr\u003e\/SCRIPTS\/TOOLS\/\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan data-type=\"text\"\u003e👉\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003e*Motor poles must be set for accurate RPM data. Contact your motor manufacturer for the correct specifications.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/RM_Sensor_Configurator_LUA_RB01.jpg?v=1769742102\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e*Used if more than one RPM sensor is used\u003c\/strong\u003e\u003c\/p\u003e\u003cp style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/RM_Sensor_Configurator_LUA_RPM_set_ID.jpg?v=1769742103\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/2_dec202e5-82be-4213-9b94-e091583eea16.jpg?v=1769581148\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/3_11c32f8c-b46f-484d-a82a-052e88b9ad04.jpg?v=1769581148\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/4_c90e120e-bd51-4e5b-bead-7e82b0c61e02.jpg?v=1769581147\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/8_80c6e6d1-5a13-4b81-b2c0-2bd53c92980b.jpg?v=1769581147\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003e\u003cspan data-type=\"text\"\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eItem：ERS-RB01 RPM-BLDC Sensor\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 5–8.4V\u003c\/li\u003e\n\u003cli\u003eOperating current: 10mA\u003c\/li\u003e\n\u003cli\u003eMeasurement method: Contact type\u003c\/li\u003e\n\u003cli\u003eSupport: Brushless\u003c\/li\u003e\n\u003cli\u003eMotor pole pairs: LUA configurable\u003c\/li\u003e\n\u003cli\u003eRange: 200–300, 000RPM\u003c\/li\u003e\n\u003cli\u003eAccuracy: ±0.1%\u003c\/li\u003e\n\u003cli\u003eTemperature range: –10 ℃ to +85 ℃\u003c\/li\u003e\n\u003cli\u003eSize: 28 × 12 × 8mm\u003c\/li\u003e\n\u003cli\u003eWeight: 4.8g\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDownload\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cbr\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cli\u003e\n\u003c\/ul\u003e\u003ch2\u003e\u003cspan data-type=\"text\"\u003eSize\u003c\/span\u003e\u003c\/h2\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/5_5bcb7f5e-28d7-45d0-a50b-5d8169793cba_480x480.jpg?v=1769581507\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\u003c\/p\u003e\u003cdiv style=\"text-align: start;\"\u003e\n\u003ch2\u003eWeight\u003c\/h2\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/6_3d5a0f49-9d5a-4514-ab44-b8960fbb685f_480x480.jpg?v=1769581507\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 * ERS-RB01 RPM-BLDC Sensor\u003c\/li\u003e\n\u003cli\u003e3 * Heat-Shrinkable Tube\u003c\/li\u003e\n\u003cli\u003e1 * Manual QR Code Card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/7_c6cf157d-29df-438c-8bd3-dec13f021a20.jpg?v=1769581542\" alt=\"ERS-RB01 -  Brushless Tachometer for Compatible ExpressLRS PWM Receivers\" style=\"float: none;\"\u003e\n\u003c\/div\u003e","brand":"mysite","offers":[{"title":"Default Title","offer_id":47437068697771,"sku":"RM0157.ERS-RB01","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/9191\/0315\/files\/1_f4002142-914e-42a5-9d23-f5fc2d06f551.jpg?v=1784538097","url":"https:\/\/begreatrchobbystore.com\/products\/ers-rb01-brushless-tachometer-for-compatible-expresslrs-pwm-receivers","provider":"Begreat RC Hobby","version":"1.0","type":"link"}