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: 09/03/2026
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
Questions and answers of the customers
There are no questions yet. Be the first to ask a question about this product.
SHIPPING & DELIVERY
We are based in the UK and ship to most destinations worldwide.
We dispatch orders during the times shown on our Dispatch Schedule. Orders placed before the daily dispatch cutoff will ship the same day (subject to stock availability). Orders placed after the cutoff will ship on the next scheduled dispatch day.
A confirmation email is sent once your order has been packed. If you need to amend your order, please contact us as soon as possible — once shipped, we’re unable to make changes.
We work with trusted delivery partners including Royal Mail, DHL, UPS, Fedex and Parcelforce. If you have a delivery requirement or would like to arrange collection, please get in touch.
Next Dispatch: Today
Please fill in the fields below with the shipping destination details in order to calculate the shipping cost.
Shipping to the UK
- Order before the daily dispatch cutoff for same day dispatch.
- FREE delivery available on qualifying orders over £99 (under 1kg).
For small, low-value orders, Royal Mail First Class is our most economical option. Royal Mail Tracked 24 is the most popular choice, offering full tracking and flexible delivery options. For guaranteed next working day delivery, we recommend Royal Mail Special Delivery.
Royal Mail delivers to residential addresses Monday to Saturday, while courier services (including DHL) typically deliver Monday to Friday.
International Postage
- USA orders: Import duties and taxes are prepaid by us — no additional customs charges on delivery.
- Other destinations: Customs duties or import taxes may apply and are the responsibility of the recipient.
Smaller, lower-value orders may be sent via Airmail or tracked postal services. Economy road and express air courier options are available depending on destination. For faster delivery, we recommend express air courier services such as DHL Express, which typically deliver within 1–2 working days across Europe and a few working days for most other destinations.
You may also like…
Reviews
Clear filtersThere are no reviews yet.