Radiomaster ERS-CU01 Current Sensor

Overview:
The RadioMaster ERS-CU01 is a compact telemetry module designed to provide real-time current and voltage data from an RC model’s power system to an ExpressLRS PWM receiver. Installed inline between the battery and ESC, it measures instantaneous current draw and supply voltage and transmits that information via the CRSF telemetry protocol to a compatible radio running EdgeTX. The ERS-CU01 supports future expansion with additional sensors and is suitable for fixed-wing aircraft, multirotors and surface models where accurate power monitoring aids performance analysis and battery management.

The ERS-CU01 is suited to pilots and model builders who want dependable telemetry on current consumption and voltage directly from their powertrain, improving situational awareness and helping to prevent overload conditions during operation.

Features:
- Reports live current draw and system voltage directly to a compatible ExpressLRS telemetry display for load and performance insight.
- Inline installation between battery and ESC provides full-system current measurement rather than partial telemetry.
- Pass-through ports allow additional ERS-series sensors to be daisy-chained without rewiring.
- Seamless integration with ExpressLRS PWM receivers enables immediate telemetry transmission with minimal configuration.

Specification:
- Model: Radiomaster ERS-CU01 Current Sensor
- Operating voltage range: 5–8.4V
- Typical operating current: 22mA
- Measured current range: 1–150A
- Maximum measurable voltage: 70V
- Current measurement accuracy: ±0.5A
- Voltage measurement accuracy: ±0.1V
- Continuous current rating: 100A
- Operating temperature range: −10℃ to +85℃
- Dimensions: 30×25×10.5mm
- Weight: 20.6g

Included:
- 1x Radiomaster ERS-CU01 Current Sensor
- Accessories