Parts/Radio & control/Telemetry sensors/RadioMaster ERS-RC01 RPM-CDI Telemetry Sensor
RadioMaster ERS-RC01 RPM-CDI Telemetry Sensor
RadioMaster

RadioMaster ERS-RC01 RPM-CDI Telemetry Sensor

Part # RM-BR0157.ERS-RC01
Where to buy
$16.99
AMain Hobbies
Seen Oct 12, 2026
$16.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

Sensor Overview

The RadioMaster ERS-RC01 RPM-CDI Telemetry Sensor is a precision tool designed for monitoring gasoline engine performance in real time. Built to integrate seamlessly with ExpressLRS systems, it provides accurate RPM data directly to your transmitter for improved control and diagnostics. By connecting to your engine’s CDI output, it captures reliable speed readings without complicated installation.


About the ERS-RC01 RPM-CDI Telemetry Sensor


Accurate Engine RPM Monitoring With Easy Integration

The ERS-RC01 measures engine speed with precision by connecting directly to the CDI speed output, ensuring accurate real-time RPM data. Using the CRSF interface, it transmits this information to a compatible ExpressLRS receiver, which relays it to your EdgeTX radio for live monitoring. Its compact and lightweight design keeps installation simple while minimizing added weight to your model. With pass-through expansion support, you can easily daisy-chain additional ERS sensors to build a fully customized telemetry system.

Features:

  • Real-time gasoline engine RPM monitoring
  • Direct CDI output connection
  • CRSF telemetry data transmission
  • ExpressLRS receiver compatibility
  • Pass-through expansion support
  • Daisy-chain multiple sensors
  • Compact and lightweight design
  • Plug-and-play installation

Includes:

  • (1) ERS-RC01 RPM-CDI Telemetry Sensor

Specifications:

Voltage Range 5-8.4V DC
Dimensions (LxWxH) 1.10x0.47x0.32in (28x12x8mm)
Weight 0.21oz (6.0g)
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews

No reviews yet.

Builds using this part

No builds use this part yet — add it to yours from the build editor.