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RadioMaster · RC Cars, Tools & Parts
Radiomaster ERS-CU01 Current Sensor
SKU RS-291 HTS 8806.99 Origin Shenzhen, CN Updated Oct 2026
Price on request
Wholesale pricing is quoted per order. Send the quantity and destination and the trade desk replies within six working hours, EXW Shenzhen.
- MOQ 4 pc — samples welcome
- Sourced equivalent available for private label
- Bench-tested before dispatch
- 12-month warranty, RMA support
- Ships in 48h · OEM run 15-20 working days
- Trade desk replies in 6h
About this product
The RadioMaster ERS-CU01 Current Sensor is a compact telemetry module for use with compatible ExpressLRS receivers. Installed inline between the battery and ESC, it measures real-time operating current and voltage for display on your EdgeTX radio. This provides instant insight into system load, efficiency, and power consumption across your entire powertrain.
VIDEO: RadioMaster ERS Series Sensor | Telemetry Module for Compatible ExpressLRS PWM Receivers
Features
- View live current draw and voltage directly on your radio to better understand system performance and prevent overload conditions
- Inline installation for accurate, full-system current measurement
- Supports daisy-chain expansion for additional ERS telemetry sensors as your setup grows
- Seamless ExpressLRS integration
- Compact & Lightweight
SENSOR CONFIGURATION & TELEMETRY LOGGING
To 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.
Specifications
- Item: ERS-CU01 Current Sensor
- Operating voltage: 5–8.4V
- Operating current: 22mA
- Current range: 1–150A
- Max voltage: 70V
- Current accuracy: ±0.5A
- Voltage accuracy: ±0.1V
- Continuous current: 100A
- Temperature range: –10 ℃ to +85 ℃
- Size: 30 × 25 × 10.5mm
- Weight: 20.6g
Links
Includes
- 1x ERS-CU01 Current Sensor
- 3x Heat-Shrinkable Tube
- 1x Manual QR Code Card
Key specifications
| Brand | RadioMaster |
|---|---|
| Department | RC Cars, Tools & Parts |
| Minimum order | 4 pcs (samples available) |
| Lead time | Ships in 48h · OEM run 15-20 working days |
Packing and freight data
| Packaging | Qty per carton | Carton (cm) | Gross weight | CBM |
|---|---|---|---|---|
| Retail box | 4 | 18 × 12 × 6 | 0.42 kg | 0.0013 |
| Inner carton | 19 | 38 × 26 × 22 | 4.6 kg | 0.0217 |
| Export carton | 159 | 58 × 42 × 38 | 21.4 kg | 0.0926 |
Placeholder packing data — confirm with your supplier before quoting freight. CBM is per export carton.
Wholesale questions
What is the minimum order quantity for Radiomaster ERS-CU01 Current Sensor?
Stock supply starts at 10 pc. The 10× and 50× quantity breaks are already applied in the price table above, and OEM branding is available from a few hundred pieces.
Can you print our brand on this product?
Yes. For Radiomaster ERS-CU01 Current Sensor we can apply your logo, use a custom shell or housing colour, flash a locked firmware build and pack it in your retail packaging. Tooling-free branding normally starts around 100-500 pieces depending on the part; tooling-backed parts are quoted individually.
How is this shipped and how long does it take?
Air express (DHL / FedEx / UPS) is typically 4-7 working days door to door. Larger orders can move by sea or rail with DDP terms so the landed cost is fixed before dispatch.
Is it tested before dispatch?
Every unit is bench-tested and inspected before packing, and we can supply CE / FCC / RoHS documentation and a QC report with the shipment.
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Get bulk pricing on your BOM in 6 hours
Send us your parts list — we return a landed-cost quote with tier pricing, lead time and shipping options. No sign-up needed, just an email address to reply to.
- Tier pricing from 1 pc to 10,000+ pcs, valid 30 days
- Mixed-SKU containers and consolidated shipping
- OEM logo, custom firmware, retail packaging
- Sample order first, scale after you test
Prefer to talk? Message the trade desk on WhatsApp.