RadioMaster ERS-RC01 RPM-CDI Gas Engine Tachometer Sensor for ExpressLRS PWM Receivers (CRSF)
RadioMaster ERS-RC01 RPM-CDI Gas Engine Tachometer Sensor for ExpressLRS PWM Receivers (CRSF)
RadioMaster
Couldn't load pickup availability
Overview
The RadioMaster ERS-RC01 is an RPM-CDI sensor (gasoline engine tachometer) designed to measure engine RPM by connecting directly to a CDI speed output. It detects engine speed and transmits RPM data to a compatible ExpressLRS PWM receiver through the CRSF interface, then forwards telemetry to an EdgeTX radio for real-time monitoring. As part of the ERS sensor family, it also supports pass-through expansion for daisy-chaining additional telemetry modules.
Launch Video
Key Features
- Accurate engine RPM: Real-time monitoring of engine RPM data
- ExpressLRS integration: Sends RPM data to compatible ExpressLRS receivers via CRSF
- Daisy chain expansion: Linear daisy-chained sensors for scalable telemetry
- Compact & lightweight: 28 x 12 x 8 mm, 6.0 g
- Plug-and-play workflow: Simple connection to CDI output for fast setup
Receiver Compatibility
Plug-and-play compatible receivers
- ER6 2.4GHz ExpressLRS PWM Receiver
- ER8 2.4GHz ExpressLRS PWM Receiver
- ER8G ExpressLRS PWM Receiver
- ER8GV ExpressLRS PWM Receiver
Using sensors with non plug-and-play PWM ExpressLRS receivers
Most PWM ExpressLRS receivers are compatible. Receivers without a dedicated UART port require reconfiguration to support external sensors by reassigning two PWM output pins as a serial UART (one TX and one RX) via the receiver Web UI (WiFi mode) or the ExpressLRS LUA script.
For receivers that only provide standard servo pins, an optional adapter cable can convert the sensor’s UART connector to two standard servo plugs (TX and RX).
For product selection help or installation questions, contact customer service at https://rcdrone.top/ or email support@rcdrone.top.
Sensor Configuration & Telemetry Logging
To configure the sensor and view telemetry on an EdgeTX radio, install the RadioMaster Sensor Configurator LUA. It supports sensor setup, correct telemetry display, and data logging.
- Connect the radio to a Mac or PC in USB-SD mode
- Copy LUA files to:
/SCRIPTS/TOOLS/
Specifications
| Item | ERS-RC01 RPM-CDI Sensor |
| Operating voltage | 5-8.4V |
| Operating current | 8mA |
| Connector type | 3-pin |
| Supported | CDI gasoline ignition |
| Range | 200-300,000 RPM |
| Accuracy | ±0.1% |
| Temperature range | -10 °C to +85 °C |
| Size | 28 x 12 x 8 mm |
| Weight | 6.0 g |
Downloads
What's Included
- 1 x ERS-RC01 RPM-CDI Sensor
- 3 x Heat-shrinkable tube
- 1 x Manual QR code card
Details
Track gasoline engine RPM through the CDI speed output and send the telemetry to ExpressLRS (CRSF) for EdgeTX display.
Use the RM Sensor Configurator LUA on EdgeTX to configure the ERS-RC01 and manage telemetry settings.
Multiple ERS modules can be discovered in one list for quick setup when expanding your telemetry system.
Pass-through expansion supports a clean, linear daisy-chain for adding more ERS telemetry sensors.
Real-time RPM readouts help monitor engine speed during tuning, testing, and flight.
Works plug-and-play with supported ER-series PWM receivers, with options to reassign pins on other PWM ELRS setups.
Key specifications at a glance, including input voltage range, RPM range, accuracy, and operating temperature.
Compact 28 × 12 × 8 mm module with a simple 3-pin connection for quick installs in tight airframes.
The sensor stays light and tidy, helping keep wiring and component weight to a minimum.
Everything needed to get started is included: ERS-RC01 sensor, QR manual card, and heat-shrink tubing.
Related Collections
