RadioMaster ERS-CV01 – Precision Cell Voltage Sensor for compatible ExpressLRS PWM Receivers
£19.99 Inc. VAT
The ERS-CV01 is a Precision Cell Voltage Sensor designed by Radiomaster for the ER series ExpressLRS PWM receivers.
In stock|Next shipping: 16/02/2026
The ERS-CV01 Cell Voltage Sensor is a compact, plug-and-play telemetry module for use with compatible ExpressLRS receivers. Just connect the sensor to your battery’s balance port, and it will monitor the real-time voltage of each cell, transmit the data via the ExpressLRS receiver, and display it directly on your EdgeTX radio.
As part of the ERS sensor family, the ERS-CV01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.
Features
Features- Real-Time Per-Cell Voltage Monitoring: Instantly view individual cell voltages through your radio for improved battery safety and performance.
- Plug-and-Play Balance Port Connection: Easily connects to the battery’s balance port for accurate cell-level voltage readings.
- Future-Ready Pass-Through: Includes an in-and-out port to daisy-chain additional ERS telemetry sensors as your setup grows.
- Seamless ExpressLRS Integration: Designed to work effortlessly with compatible ER series ExpressLRS PWM receiver.
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.
Cell Voltage Display, Configuration & Logging
- CellsValues LUA → /WIDGETS/
- RadioMaster Sensor Configurator LUA → /SCRIPTS/TOOLS/
👉Download the RadioMaster ERS Sensors Configurator.lua
- Item: ERS-CV01 Cell Voltage Sensor
- Operating voltage (serial port): 5–8.4V
- Operating current (serial): 8mA
- Balance port current (8S): 2mA
- Supported cells: 2–8S
- Battery types: LiPo, LiHV, LiFe, LiIon
- Voltage accuracy: ±0.01V
- Temperature range: –10 ℃ to +85 ℃
- Size: 43.5 × 25 × 7mm
- Weight: 6.5g
Included:
- 1 x ERS-CV01 Cell Voltage Sensor
- 3 x Heat-Shrinkable Tube
- 1 x Manual QR Code Card
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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.
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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.
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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.
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