RadioMaster ERS-RC01 – CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers
£16.99 Inc. VAT
Track real-time CDI gas engine RPM on your EdgeTX radio with the ERS-RC01 — a compact ExpressLRS tachometer delivering accurate engine speed telemetry with simple installation.
In stock|Next shipping: 17/02/2026
The 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.
As part of the ERS sensor family, the ERS-RC01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.
Features
- Accurate Engine RPM: Monitors gasoline engine speed in real time with precision.
- ExpressLRS Integration: Sends RPM data directly to compatible ExpressLRS receivers via the CRSF interface.
- Versatile Applications: Ideal for any application requiring accurate RPM feedback.
- Compact & Lightweight: Easy to install without adding unnecessary weight.
- Plug-and-Play: Simple connection to the CDI output for fast setup.
Plug and Play Compatible Receivers:
- ER6 2.4GHz ExpressLRSPWM Receiver
- ER8 2.4GHz ExpressLRSPWM Receiver
- ER8G & ER8GV ExpresersLRS PWM Receiver
Using Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers:
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—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.
For receivers that only provide standard servo pins, an optional adapter cable is available that converts the sensor’s UART connector to two standard servo plugs (TX and RX). Available HERE.
Sensor Configuration & Telemetry Logging
o 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.
After downloading, connect your radio to a Mac or PC in USB-SD mode.
Copy the LUA files to:
/SCRIPTS/TOOLS/
👉Download the RadioMaster ERS Sensors Configurator.lua
- 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, 000RPM
- Accuracy: ±0.1%
- Temperature range: –10 ℃ to +85 ℃
- Size: 28 × 12 × 8mm
- Weight: 6.0g
Included:
- 1 * ERS-RC01 RPM-CDI Sensor
- 3 * Heat-Shrinkable Tube
- 1 * Manual QR Code Card
Questions and answers of the customers
There are no questions yet. Be the first to ask a question about this product.
SHIPPING & DELIVERY
We are based in the UK, but ship to most worldwide destinations. Postage rates are calculated by the size/weight and shipment location. We process orders Monday to Friday and pride ourselves on our quick turnaround of orders - most UK orders will arrive the next day.
We are partnered with several delivery companies including Royal Mail, DHL, UPS and Parcel Force. If you have a special delivery requirement or would like to arrange a shop collection please contact us.
A confirmation email will be sent when your order has been dispatched. If you wish to change your order, please contact us promptly, as we won't be able to make amendments once the order has been shipped.
Please fill in the fields below with the shipping destination details in order to calculate the shipping cost.
Shipping to the UK
- Order before 4PM for same day dispatch with Royal Mail, 2PM for next day delivery with DHL and 1PM for next day delivery with APC.
- We offer FREE Shipping on UK orders over £99, weighing less than 1kg.
- The courier options deliver Monday to Friday, Royal Mail delivers to residential addresses on Monday to Saturday.
For small low value orders our cheapest delivery service is Royal Mail First Class. For a guaranteed next day delivery we recommend Royal Mail Special Delivery or one of our courier delivery options.
International Postage
- Order before 4PM for same day dispatch with Royal Mail.
- Abitur parturient praesent lectus quam a natoque adipiscing a vestibulum hendre.
- DHL Express offers NEXT DAY delivery to most European destinations and a very fast delivery for countries further afield, generally 2-3 days.
Orders shipped outside the EU may be subject to customs charges. These charges are additional to any delivery costs and will need to be paid by the recipient.
You may also like…
Reviews
Clear filtersThere are no reviews yet.