Radio systems and receivers: choosing a reliable control link
Channels, receiver protocols, telemetry, range, redundancy and what to check before matching a transmitter to a model.
ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers
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Contact RC-MODEL for current availability, technical fit, compatible accessories and a formal quote.
ERS-CU01 - Real-Time Current Sensor 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-CU01
- Product Family: RadioMaster receiver range
- Protocol / RF: ExpressLRS / ELRS, 2.4GHz, EdgeTX
- Weight: 20.6g
- Real-Time Current Monitoring: View live current draw and voltage directly on your radio to better understand system performance and prevent overload conditions.
- Inline Installation: Soldered between the battery and ESC for accurate, full-system current measurement.
- Future-Ready Pass-Through: Includes in-and-out ports for daisy-chaining additional ERS sensors as your telemetry needs grow.
- Seamless ExpressLRS Integration: Designed to work smoothly with compatible ExpressLRS PWM receivers.
- Item: ERS-CU01 Current Sensor
- Operating voltage: 5-8.4V
- Operating current: 22mA
- Current range: 1-150A
- Max voltage: 70V
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| Technical Specifications | |
| Manufacturer | RadioMaster |
| Brand | RadioMaster |
| Product Code | RM0157.ERS-CU01 |
| All Variant SKUs | RM0157.ERS-CU01 |
| 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-CU01 Current Sensor |
| Weight | 20.6g |
| Protocol / RF | ExpressLRS / ELRS, 2.4GHz, EdgeTX |
| Operating voltage | 5-8.4V |
| Operating current | 22mA |
| Temperature range | -10 ℃ to +85 ℃ |
| Size | 30 × 25 × 10.5mm |
| Real-Time Current Monitoring | View live current draw and voltage directly on your radio to better understand system performance and prevent overload conditions. |
| Inline Installation | Soldered between the battery and ESC for accurate, full-system current measurement. |
| Future-Ready Pass-Through | Includes in-and-out ports for daisy-chaining additional ERS sensors as your telemetry needs grow. |
| Seamless ExpressLRS Integration | Designed to work smoothly with compatible ExpressLRS PWM receivers. |
| Current range | 1-150A |
| Max voltage | 70V |
| Current accuracy | ±0.5A |
| Voltage accuracy | ±0.1V |
| Continuous current | 100A |
Tags: RadioMaster, RM0157.ERS-CU01, RadioMaster Accessories, ERS Series Sensors, RC radio