{"product_id":"radiomaster-ers-rc01-cdi-gas-engine-tachometer-for-compatible-expresslrs-pwm-receivers","title":"RadioMaster ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers","description":"\u003cp\u003eThe ERS-RC01 Gasoline Engine Tachometer measures RPM by connecting directly to your engine's CDI speed output. The sensor accurately detects engine speed, transmits the data to a compatible ExpressLRS receiver through the CRSF interface, and then sends it back to your EdgeTX radio for real-time monitoring. Ideal for any application requiring accurate RPM feedback.\u003c\/p\u003e\n\u003cp\u003eAs part of the ERS sensor family, the ERS-RC01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003eCheck out all our \u003ca title=\"ExpressLRS Products Sold At Pyrodrone\" href=\"https:\/\/pyro-drone.myshopify.com\/admin\/collections\/263643398187\" target=\"_blank\"\u003eExpressLRS Products\u003c\/a\u003e, \u003ca title=\"Receivers for FPV Drone Racing and Freestyle sold by Pyrodrone\" href=\"https:\/\/pyrodrone.com\/collections\/receivers\" target=\"_blank\"\u003eReceivers\u003c\/a\u003e, and the rest of our \u003ca title=\"RadioMaster Products Sold At Pyrodrone\" href=\"https:\/\/pyrodrone.com\/collections\/radiomaster-products\" target=\"_blank\"\u003eRadioMaster Products\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"795\" height=\"446\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I\" title=\"RadioMaster ERS Series Sensor | Telemetry Module for Compatible ExpressLRS PWM Receivers\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/1_288a2611-bcc0-4f33-b782-dd2529c62190.webp?v=1769611706\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/2_a796b319-97ad-4241-844e-20a31a36eaf3.webp?v=1769610018\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/3_2366e714-cab7-49cc-a81a-dfc65e91919e.webp?v=1769611722\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6.webp?v=1769611732\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/5_480x480_fb9a43b8-260e-4fb6-aaf0-a0a004e60a8c.webp?v=1769611740\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/lQDPJwxghyZwzp_NA-jNAu6wjUA3ou6t1BIJUqBa-coPAA_750_1000_480x480_2008631d-cdc5-4756-8ed2-1a489444538f.webp?v=1769611754\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003ePlug and Play Compatible Receivers:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eER6 2.4GHz ExpressLRSPWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8 2.4GHz ExpressLRSPWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8G \u0026amp; ER8GV ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-type=\"text\"\u003eFeatures:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccurate Engine RPM:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMonitors gasoline engine speed in real time with precision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpressLRS Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSends RPM data directly to compatible ExpressLRS receivers via the CRSF interface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIdeal for any application requiring accurate RPM feedback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEasy to install without adding unnecessary weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSimple connection to the CDI output for fast setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-type=\"text\"\u003eSpecifications:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eItem: ERS-RC01 RPM-CDI Sensor\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 5–8.4V\u003c\/li\u003e\n\u003cli\u003eOperating current: 8mA\u003c\/li\u003e\n\u003cli\u003eConnector type: 3 pin\u003c\/li\u003e\n\u003cli\u003eSupported: CDI gasoline ignition\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: 6.0g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-type=\"text\"\u003eUsing Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers:\u003c\/span\u003e\u003c\/h3\u003e\n\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\n\u003cp\u003e\u003cspan data-type=\"text\"\u003eFor receivers that only provide standard servo pins, an optional \u003ca href=\"https:\/\/pyrodrone.com%20%E2%80%BA%20products%20%E2%80%BA%20radiomaster-ers-sensor-uart-to-dual-pwm-adapter\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003e\u003cstrong\u003eadapter cable\u003c\/strong\u003e\u003c\/em\u003e\u003c\/a\u003e is available that converts the sensor’s UART connector to two standard servo plugs (TX and RX).\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003ePackage Includes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 * ERS-RC01 RPM-CDI Sensor\u003c\/li\u003e\n\u003cli\u003e3 * Heat-Shrinkable Tube\u003c\/li\u003e\n\u003cli\u003e1 * Manual QR Code Card\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"RadioMaster","offers":[{"title":"Default Title","offer_id":68063557288186,"sku":"U3-14451","price":17.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/6632\/1146\/files\/1_1080x_72991b27-7dd8-4861-ae11-bd72bf7791c0.webp?v=1793672640","url":"https:\/\/aeroforgerc.store\/products\/radiomaster-ers-rc01-cdi-gas-engine-tachometer-for-compatible-expresslrs-pwm-receivers","provider":"AeroForge RC","version":"1.0","type":"link"}