{"product_id":"radiomaster-ers-cu01-real-time-current-sensor-for-compatible-expresslrs-pwm-receivers","title":"RadioMaster ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers","description":"\u003cp\u003eThe ERS-CU01 Current Sensor is a compact telemetry module for use with compatible ExpressLRS  receivers. Installed inline between the battery and ESC, it measures real-time operating current and voltage sending the data through the ExpressLRS receiver for display on your EdgeTX radio. This provides instant insight into system load, efficiency, and power consumption across your entire powertrain.\u003c\/p\u003e\n\u003cp\u003eAs part of the ERS sensor family, the ERS-CU01 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 href=\"https:\/\/pyro-drone.myshopify.com\/admin\/collections\/263643398187\" title=\"ExpressLRS Products Sold At Pyrodrone\" target=\"_blank\"\u003eExpressLRS Products\u003c\/a\u003e, \u003ca href=\"https:\/\/pyrodrone.com\/collections\/receivers\" title=\"Receivers for FPV Drone Racing and Freestyle sold by Pyrodrone\" target=\"_blank\"\u003eReceivers\u003c\/a\u003e, and the rest of our \u003ca href=\"https:\/\/pyrodrone.com\/collections\/radiomaster-products\" title=\"RadioMaster Products Sold At Pyrodrone\" target=\"_blank\"\u003eRadioMaster Products\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe title=\"RadioMaster ERS Series Sensor | Telemetry Module for Compatible ExpressLRS PWM Receivers\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I\" height=\"446\" width=\"795\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/1_bd92a794-19aa-4b13-9467-e83ae356542c.webp?v=1769610705\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/2_a796b319-97ad-4241-844e-20a31a36eaf3.webp?v=1769610018\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/2_903a87e7-42d4-4eba-a04f-1f005378a42e.webp?v=1769610766\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/3_86143749-4d87-460f-af01-c183d47281f2.webp?v=1769610777\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/5_480x480_837ac693-3b85-4c62-a6f8-5b5c2109a11e.webp?v=1769610870\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2778\/6650\/files\/6_908be9f0-b240-4001-b6fe-91a7784aa68b.webp?v=1769610880\" 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\u003eReal-Time Current Monitoring:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eView live current draw and voltage directly on your radio to better understand system performance and prevent overload conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInline Installation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSoldered between the battery and ESC for accurate, full-system current measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuture-Ready Pass-Through:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncludes in-and-out ports for daisy-chaining additional ERS sensors as your telemetry needs grow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless ExpressLRS Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned to work smoothly with compatible ExpressLRS PWM receivers.\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-CU01 Current Sensor\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 5–8.4V\u003c\/li\u003e\n\u003cli\u003eOperating current: 22mA\u003c\/li\u003e\n\u003cli\u003eCurrent range: 1–150A\u003c\/li\u003e\n\u003cli\u003eMax voltage: 70V\u003c\/li\u003e\n\u003cli\u003eCurrent accuracy: ±0.5A\u003c\/li\u003e\n\u003cli\u003eVoltage accuracy: ±0.1V\u003c\/li\u003e\n\u003cli\u003eContinuous current: 100A\u003c\/li\u003e\n\u003cli\u003eTemperature range: –10 ℃ to +85 ℃\u003c\/li\u003e\n\u003cli\u003eSize: 30 × 25 × 10.5mm\u003c\/li\u003e\n\u003cli\u003eWeight: 20.6g\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 rel=\"noopener\" href=\"https:\/\/pyrodrone.com%20%E2%80%BA%20products%20%E2%80%BA%20radiomaster-ers-sensor-uart-to-dual-pwm-adapter\" 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-CU01 Current 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":68257921302765,"sku":"U7-14448","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5410\/9677\/files\/1_1080x_2fc8558e-2e9d-4019-90fd-672792e14179.webp?v=1794366340","url":"https:\/\/primegrit.store\/products\/radiomaster-ers-cu01-real-time-current-sensor-for-compatible-expresslrs-pwm-receivers","provider":"VELORA","version":"1.0","type":"link"}