SKU: 56632552589

RadioMaster ERS-RB01 Brushless Tachometer for ELRS PWM Receivers

Sale price$13.50 Regular price$15.00
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Description

RadioMaster ERS-RB01 Brushless Tachometer for ELRS PWM ReceiversThe 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

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

  • Accurate RPM Monitoring: Captures real-time brushless speed with high precision.
  • ExpressLRS Integration: Sends RPM data directly to compatible ExpressLRS receivers via the CRSF interface.
  • Multi-Unit Support: Connect multiple ERS-RB01 sensors to monitor several units simultaneously.
  • Versatile Applications: Ideal for any application requiring accurate RPM feedback.
  • Compact & Lightweight: Easy to install without adding significant weight.
  • Plug-and-Play: Quick setup with minimal wiring for fast deployment.

Specifications

  • Item:ERS-RB01 RPM-BLDC Sensor
  • Operating voltage: 5–8.4V
  • Operating current: 10mA
  • Measurement method: Contact type
  • Support: Brushless
  • Motor pole pairs: LUA configurable
  • Range: 200–300, 000RPM
  • Accuracy: ±0.1%
  • Temperature range: –10 ℃ to +85 ℃
  • Size: 28 × 12 × 8mm
  • Weight: 4.8g

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.

Includes

  • 1 x  ERS-RB01 RPM-BLDC Sensor
  • 3 x Heat-Shrinkable Tube
  • 1 x Manual QR Code Card

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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56632552589

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4.7 ★★★★★
Based on 14 reviews
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SonicHog
Chelsea, US
★★★★★ 4
Great product. Suction can be improved though.
Color: Silver
I'm satisfied with my purchase. It gets the job done. The suction pads can definitely be improved though, I found that pads couldn't keep the holder in place for more than an hour so I just removed the suction pads and kept it beside my sink. Overall, great product. Would definitely recommend.
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Reviewed in the United States on December 13, 2020
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Timothy Jeandrevin
Belleville, US
★★★★★ 5
It actually sticks to the sink and stays where it is supposed to. Well made. We love it!
Color: Silver
Finely, a sink caddy that actually sticks to the sink! We have been so frustrated trying to find one that does. This one is great. We just used the suction cups, which are large and there are 3 of them. If finely actually stays there!
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Reviewed in the United States on February 13, 2026
B
Verified Purchase
Beth
Alexandria, US
★★★★★ 5
Works & Looks Great!
This item comes with two options for sticking to the sink, suction cups & an adhesive thing. I decided to try the suction cups first, that way I can remove them to clean, plus I wanted to test out the position of where I put it on the sink. They work great! I haven’t had to re-stick not once. Great staying power! And it looks really good! Also, the seller sent a follow-up message just to check in & offer answers if any questions arose. That meant the world to me, like it’s not every day a seller cares what you think once money changes hands. 10/10 would recommend!
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Reviewed in the United States on May 26, 2024
E
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Efren
Natrona Heights, US
★★★★★ 5
Small size, but holds up to two sponges
Needed something to hold my sponges in the sink and this did the job
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Reviewed in the United States on May 13, 2026
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Verified Purchase
"laurasinda"
Belleville, US
★★★★★ 3
need a smooth sink surface for this to work
Color: Silver
Suction cups didn't stick to my sink and kept falling; to be fair, surface of my sink is textured.
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Reviewed in the United States on June 12, 2025

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