RadioMaster ERS-RB01 – Brushless Tachometer for Compatible ExpressLRS PWM Receivers
£16.99 Inc. VAT
Monitor real-time brushless motor RPM on your EdgeTX radio with the ERS-RB01 โ a compact ExpressLRS tachometer.
In stock|Next shipping: 17/02/2026
The ERS-RB01 Brushless Tachometer measures RPM by tapping directly into any two wires of a brushless ESC output. The sensor captures precise speed data, sends it to a compatible ExpressLRS receiver via the CRSF interface, and relays the information back to your EdgeTX radio for real-time monitoring. Ideal for any application requiring accurate RPM feedback.
As part of the ERS sensor family, the ERS-RB01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.
Features
Features- Accurate RPM Monitoring:ย Captures real-time brushless speed with high precision.
- ExpressLRS Integration:ย Sends RPM data directly to compatible ExpressLRS receivers via the CRSF interface.
- Multi-Unit Support:ย Connect multiple ERS-RB01 sensors to monitor several units simultaneously.
- Versatile Applications:ย Ideal for any application requiring accurate RPM feedback.
- Compact & Lightweight:ย Easy to install without adding significant weight.
- Plug-and-Play:ย Quick setup with minimal wiring for fast deployment.
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 UARTโone for TX and one for RXโvia 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 sensorโs UART connector to two standard servo plugs (TX and RX). Available HERE.
Sensor Configuration & Telemetry Logging
o 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.
After downloading, connect your radio to a Mac or PC in USB-SD mode.
Copy the LUA files to:
/SCRIPTS/TOOLS/
๐Download the RadioMaster ERS Sensors Configurator.lua
- Item๏ผERS-RB01 RPM-BLDC Sensor
- Operating voltage: 5โ8.4V
- Operating current: 10mA
- Measurement method: Contact type
- Support: Brushless
- Motor pole pairs: LUA configurable
- Range: 200โ300, 000RPM
- Accuracy: ยฑ0.1%
- Temperature range: โ10 โ to +85 โ
- Size: 28 ร 12 ร 8mm
- Weight: 4.8g
Included:
- 1 * ERS-RB01 RPM-BLDC Sensor
- 3 * Heat-Shrinkable Tube
- 1 * 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/weightย 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.
We are partnered with several delivery companiesย including Royal Mail, DHL, UPS and Parcel Force. If you have a special delivery requirement or would like to arrange a shop collection pleaseย contact us.
A confirmation email will be sent when your order has been dispatched. If you wish to change your order, please contact us promptly, as we won't be able to make amendments once the order has been shipped.
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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.
- We offer FREE Shipping on UK orders over ยฃ99, weighing less than 1kg.
- The courier options deliver Monday to Friday, Royal Mail delivers to residential addresses on Monday to Saturday.
For small low value orders our cheapest delivery service is Royal Mail First Class.ย For a guaranteed next day delivery we recommendย Royal Mail Special Delivery orย one of our courier delivery options.
International Postage
- Order before 4PM for same day dispatch with Royal Mail.
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- DHL Express offersย NEXT DAY delivery to most Europeanย destinationsย and a very fast delivery for countries further afield, generally 2-3 days.
Orders shipped outside the EU may be subject to customs charges. These charges are additional to any delivery costs and will need to be paid by the recipient.
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