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RadioMaster ERS-CU01 Real Time Current Sensor for ELRS PWM Receivers

Name: RadioMaster ERS-CU01 Real Time Current Sensor for ELRS PWM Receivers
Brand: RadioMaster
SKU: 34493
Price: 29.99 AUD
Availability: InStock

$29.99 AUD $36.95 AUD Save 19%

GST included Shipping calculated at checkout.

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2 In stock

Price match

Order in H, M, Seconds (before 1pm Sydney time) for same day despatch.

Fast dispatch from Somersby, NSW Easy returns Australian warranty & local support

Pickup available

1/80 Somersby falls RD, Somersby NSW

We open 7:30am Monday - weekend orders are usually ready to collect by 10am

Product details

SKU: 34493

Barcode: RM0157.ERS-CU01

Shipping Weight: 55g

W/H: W-04-C-05

Categories: Drone RC RX Receivers, ELRS Express LRS Receivers & Modules, FPV Antennas, Radio Gear, Radiomaster, Specials

Tags: 2.4ghz, ELRS, Price Match, Receiver

Why buy from Phaser FPV?

Dependable — Phaser started in 2014. Long reputable history and 5 star reviews.
Speed — All stock is in our retail store in Somersby NSW Australia. We ship express today; you often receive tomorrow. Shipping details.
Transparent stock — If it says in stock, we ship today. If we know the ETA, we show it on the product.
Experience — Across our staff you'll find people who fly, build, and use this gear. Not sure what to buy? Call us — we'll help you avoid buying twice.
Free gift on first and recurring orders
Active on social media — tag us or DM us
Large Facebook community for like-minded pilots
GST registered — handy if you need to claim GST (some niche FPV stores are not)

Are you looking to buy RadioMaster ERS-CU01 Real Time Current Sensor for ELRS PWM Receivers in Australia?

The 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 sending the data through the ExpressLRSreceiver for display on your EdgeTX radio. This provides instant insight into system load, efficiency, and power consumption across your entire powertrain.

As part of the ERS sensor family, the ERS-CU01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.

Features

Real-Time Current Monitoring: View live current draw and voltage directly on your radio to better understand system performance and prevent overload conditions.
Inline Installation: Soldered between the battery and ESC for accurate, full-system current measurement.
Future-Ready Pass-Through: Includes in-and-out ports for daisy-chaining additional ERS sensors as your telemetry needs grow.
Seamless ExpressLRS Integration: Designed to work smoothly with compatible ExpressLRS PWM receivers.

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

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.