{"id":26028,"date":"2026-05-07T22:03:12","date_gmt":"2026-05-07T20:03:12","guid":{"rendered":"https:\/\/originhobbies.com\/?post_type=product&#038;p=26028"},"modified":"2026-05-21T08:58:56","modified_gmt":"2026-05-21T06:58:56","slug":"radiomaster-ers-rb01-ers-rc01-cdi-gas-engine-tachometer-for-erx-expresslrs-receivers","status":"publish","type":"product","link":"https:\/\/originhobbies.com\/da\/shop\/radio-control\/telemetry-sensors\/radiomaster-ers-rb01-ers-rc01-cdi-gas-engine-tachometer-for-erx-expresslrs-receivers\/","title":{"rendered":"Radiomaster ERS-RC01 &#8211; CDI Gas Engine Tachometer for ERx ExpressLRS receivers"},"content":{"rendered":"<p class=\"wp-block-paragraph\">The ERS-RC01 Gasoline Engine Tachometer measures RPM by connecting directly to your engine&#8217;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.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As part of the ERS sensor family, the ERS-RC01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/1_288a2611-bcc0-4f33-b782-dd2529c62190.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-26037\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/1_288a2611-bcc0-4f33-b782-dd2529c62190.jpg 1024w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/1_288a2611-bcc0-4f33-b782-dd2529c62190-300x168.jpg 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/1_288a2611-bcc0-4f33-b782-dd2529c62190-768x431.jpg 768w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/1_288a2611-bcc0-4f33-b782-dd2529c62190-18x10.jpg 18w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/1_288a2611-bcc0-4f33-b782-dd2529c62190-416x234.jpg 416w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Video<\/h3>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-embed-handler wp-block-embed-embed-handler wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"RadioMaster ERS Series Sensor | Telemetry Module for Compatible ExpressLRS PWM Receivers\" width=\"980\" height=\"551\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Features<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Real-Time Per-Cell Voltage Monitoring<\/strong>: Instantly view individual cell voltages through your radio for improved battery safety and performance.<\/li>\n\n\n\n<li><strong>Plug-and-Play Balance Port Connection:<\/strong> Easily connects to the battery\u2019s balance port for accurate cell-level voltage readings.<\/li>\n\n\n\n<li><strong>Future-Ready Pass-Through:<\/strong> Includes an in-and-out port to daisy-chain additional ERS telemetry sensors as your setup grows.<\/li>\n\n\n\n<li><strong>Seamless ExpressLRS Integration:<\/strong> Designed to work effortlessly with compatible ER series ExpressLRS PWM receiver.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Plug and Play Compatible Receivers:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/originhobbies.com\/da\/shop\/radio-control\/radio-receivers\/elrs-protocol\/radiomaster-er6-2-4ghz-6ch-elrs-pwm-receiver\/\" data-type=\"product\" data-id=\"8876\">ER6 2.4GHz ExpressLRSPWM Receiver<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/originhobbies.com\/da\/shop\/radio-control\/radio-receivers\/elrs-protocol\/radiomaster-er8-elrs-pwm-receiver-for-airplane-8-channel-lbt\/\" data-type=\"product\" data-id=\"14592\">ER8 2.4GHz ExpressLRSPWM Receiver<\/a><\/li>\n\n\n\n<li>ER8G &amp; ER8GV ExpressLRS PWM Receiver<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Using Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Most 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\u2014one for TX and one for RX\u2014via the receiver&#8217;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.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For receivers that only provide standard servo pins, an optional adapter cable is available that converts the sensor\u2019s UART connector to two standard servo plugs (TX and RX). Available here: <a href=\"https:\/\/radiomasterrc.com\/products\/ers-sensor-uart-to-dual-pwm-adapter\" rel=\"noreferrer noopener nofollow\" target=\"_blank\">https:\/\/radiomasterrc.com\/products\/ers-sensor-uart-to-dual-pwm-adapter<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Sensor Configuration &amp; Telemetry Logging<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To 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.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After downloading, connect your radio to a Mac or PC in USB-SD mode.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Copy the LUA files to:<br>\/SCRIPTS\/TOOLS\/<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49<a rel=\"noreferrer noopener nofollow\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/SENSOR_LUA.zip?v=1769595857\" target=\"_blank\">Download the RadioMaster ERS Sensors Configurator.lua<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"320\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Main.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-25993\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Main.jpg 480w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Main-300x200.jpg 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Main-18x12.jpg 18w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Main-416x277.jpg 416w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"320\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Sensor_view.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-25994\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Sensor_view.jpg 480w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Sensor_view-300x200.jpg 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Sensor_view-18x12.jpg 18w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/RM_Sensor_Configurator_LUA_Sensor_view-416x277.jpg 416w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/3_2366e714-cab7-49cc-a81a-dfc65e91919e.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-26040\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/3_2366e714-cab7-49cc-a81a-dfc65e91919e.jpg 1024w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/3_2366e714-cab7-49cc-a81a-dfc65e91919e-300x168.jpg 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/3_2366e714-cab7-49cc-a81a-dfc65e91919e-768x431.jpg 768w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/3_2366e714-cab7-49cc-a81a-dfc65e91919e-18x10.jpg 18w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/3_2366e714-cab7-49cc-a81a-dfc65e91919e-416x234.jpg 416w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"575\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-26038\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6.jpg 1024w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6-300x168.jpg 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6-768x431.jpg 768w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6-18x10.jpg 18w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/4_b5c6caac-43a4-40f7-b181-0b716d4cc4f6-416x234.jpg 416w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">specifikationer<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Item: ERS-RC01 RPM-CDI Sensor<\/li>\n\n\n\n<li>Operating voltage: 5\u20138.4V<\/li>\n\n\n\n<li>Operating current: 8mA<\/li>\n\n\n\n<li>Connector type: 3 pin<\/li>\n\n\n\n<li>Supported: CDI gasoline ignition<\/li>\n\n\n\n<li>Range: 200\u2013300, 000RPM<\/li>\n\n\n\n<li>Accuracy: \u00b10.1%<\/li>\n\n\n\n<li>Temperature range: \u201310 \u2103 to +85 \u2103<\/li>\n\n\n\n<li>Size: 28 \u00d7 12 \u00d7 8mm<\/li>\n\n\n\n<li>Weight: 6.0g<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Download<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ERS-RC01-1.3-user-manual.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">ERS-RC01 User Manual<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/SENSOR_LUA.zip?v=1769595857\" rel=\"nofollow noopener\" target=\"_blank\">RadioMaster ERS Sensors Configurator.lua<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/ERS_Sensors_V1.9.bin?v=1778047269\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">ERS Series Sensors Firmware V1.9<\/a><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Size<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"480\" height=\"315\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/5_c9488ddd-1693-438c-a849-732282a8e361_480x480.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-26039\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/5_c9488ddd-1693-438c-a849-732282a8e361_480x480.jpg 480w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/5_c9488ddd-1693-438c-a849-732282a8e361_480x480-300x197.jpg 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/5_c9488ddd-1693-438c-a849-732282a8e361_480x480-18x12.jpg 18w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/5_c9488ddd-1693-438c-a849-732282a8e361_480x480-416x273.jpg 416w\" sizes=\"auto, (max-width: 480px) 100vw, 480px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Weight<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"454\" height=\"480\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/lQDPJwxghyZwzp_NA-jNAu6wjUA3ou6t1BIJUqBa-coPAA_750_1000_480x480.jpg\" alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" class=\"wp-image-26041\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/lQDPJwxghyZwzp_NA-jNAu6wjUA3ou6t1BIJUqBa-coPAA_750_1000_480x480.jpg 454w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/lQDPJwxghyZwzp_NA-jNAu6wjUA3ou6t1BIJUqBa-coPAA_750_1000_480x480-284x300.jpg 284w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/lQDPJwxghyZwzp_NA-jNAu6wjUA3ou6t1BIJUqBa-coPAA_750_1000_480x480-11x12.jpg 11w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/lQDPJwxghyZwzp_NA-jNAu6wjUA3ou6t1BIJUqBa-coPAA_750_1000_480x480-416x440.jpg 416w\" sizes=\"auto, (max-width: 454px) 100vw, 454px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Package Includes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 * ERS-RC01 RPM-CDI Sensor<\/li>\n\n\n\n<li>3 * Heat-Shrinkable Tube<\/li>\n\n\n\n<li>1 * Manual QR Code Card<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5.webp\" alt=\"\" class=\"wp-image-26032\" srcset=\"https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5.webp 1000w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-300x300.webp 300w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-150x150.webp?crop=1 150w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-768x768.webp 768w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-12x12.webp 12w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-324x324.webp?crop=1 324w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-416x416.webp 416w, https:\/\/originhobbies.com\/wp-content\/uploads\/2026\/05\/ers-rc01-5-100x100.webp?crop=1 100w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>The ERS-RC01 Gasoline Engine Tachometer measures RPM by connecting directly to your engine&#8217;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. As [&hellip;]<\/p>\n","protected":false},"featured_media":26036,"comment_status":"open","ping_status":"closed","template":"","meta":{"_eb_attr":""},"product_brand":[],"product_cat":[468],"product_tag":[],"class_list":["post-26028","product","type-product","status-publish","has-post-thumbnail","product_cat-telemetry-sensors","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/product\/26028","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/comments?post=26028"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/media\/26036"}],"wp:attachment":[{"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/media?parent=26028"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/product_brand?post=26028"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/product_cat?post=26028"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/originhobbies.com\/da\/wp-json\/wp\/v2\/product_tag?post=26028"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}