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A general ARF assembly workflow for many aircraft: dry fit, hinges, servo installation, power setup, CG, control checks and first-flight preparation.
ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers
Prices are intentionally not displayed on the site.
Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers is a RadioMaster product intended for RC aircraft, FPV, surface and telemetry receiver installations. This page presents the practical buying information in one place: compatibility, SKU, variants, radio protocol, use case and technical details.
The content is written for customer decision-making through RC-MODEL, without supplier prices or outbound purchase routes.
Key Advantages
- Organized for RC aircraft, FPV, surface and telemetry receiver installations.
- Part of the RadioMaster receiver range.
- RF/protocol context: ExpressLRS / ELRS, 2.4GHz, EdgeTX.
- Includes local product imagery and structured specifications for customer comparison.
Core Specifications
- Product Code: RM0157.ERS-RC01
- Product Family: RadioMaster receiver range
- Protocol / RF: ExpressLRS / ELRS, 2.4GHz, EdgeTX
- Weight: 6.0g
- 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.
- Item: ERS-RC01 RPM-CDI Sensor
- Operating voltage: 5-8.4V
- Operating current: 8mA
- Connector type: 3 pin
Relevant RC Academy guides
Learn before you buy
These guides explain the setup, safety checks and accessory choices that usually matter for this product type.
Servo selection: torque, speed, gears and voltage
How to select servos for trainers, sport aircraft, large models, cars and boats without under-sizing a control surface.
How to balance an RC aircraft and find the correct CG
One of the most important setup guides: find the CG, install the flight battery, balance the aircraft and avoid nose-heavy or tail-heavy surprises.
Mandatory pre-flight checks for safer RC flying
A repeatable inspection routine for control direction, radio range, failsafe, battery, fasteners, propeller, CG and field readiness.
How to perform the first test flight of an RC aircraft
Ground checks, takeoff planning, trim passes, battery timing and first landing strategy for a new or repaired RC aircraft.
| Technical Specifications | |
| Manufacturer | RadioMaster |
| Brand | RadioMaster |
| Product Code | RM0157.ERS-RC01 |
| All Variant SKUs | RM0157.ERS-RC01 |
| Product Type | ERS Series Sensor |
| RadioMaster Collections | Accessories, ERS Series Sensor |
| Product Family | RadioMaster receiver range |
| Application | RC aircraft, FPV, surface and telemetry receiver installations |
| Item | ERS-RC01 RPM-CDI Sensor |
| Weight | 6.0g |
| Protocol / RF | ExpressLRS / ELRS, 2.4GHz, EdgeTX |
| 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. |
| 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 |
Tags: RadioMaster, RM0157.ERS-RC01, RadioMaster Accessories, ERS Series Sensors, RC radio