RadioMaster ER8G 2.4GHz ELRS PWM Receiver

Short Description:

RadioMaster ER8G 2.4GHz ExpressLRS receiver with 8 PWM channels, dual 20 cm antennas, up to 100 mW telemetry power, and DC 3.5-8.4 V input for gliders and fixed-wing aircraft.

Product Name: RadioMaster ER8G 2.4GHz ELRS PWM Receiver
Product Type: 8-Channel ExpressLRS PWM Receiver
Frequency Range: 2.4 GHz
Channels: 8 PWM Channels
Telemetry Power: Up to 100 mW, LUA adjustable
Input Voltage: DC 3.5-8.4 V
Receiver Protocol: ExpressLRS 2.4 GHz; ExpressLRS 3.3.0 pre-installed
Dimensions: 60 × 13.5 × 13 mm
Antenna Type: Dual 20 cm high-sensitivity antennas
External Battery Voltage Detection: DC 4.0-35 V

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Product Detail

FAQ

Technical Highlights

Eight PWM Channels in a Slim Receiver

The ER8G provides eight PWM outputs for compatible servos and other PWM-controlled RC equipment. Its 60 × 13.5 × 13 mm housing is suited to installations where a narrow receiver body is useful.

Dual-Antenna 2.4 GHz ExpressLRS Link

Dual 20 cm high-sensitivity antennas support the 2.4 GHz ExpressLRS radio link. Receiver telemetry power is LUA adjustable up to a maximum of 100 mW; this is not FPV video-transmitter output power.

Receiver and External Battery Voltage Telemetry

The receiver can report its own voltage or an externally measured battery voltage, automatically selecting the voltage input in use. The DC 4.0-35 V external detection range is separate from the DC 3.5-8.4 V receiver supply range.

Configuration and Sensor Expansion

The ER8G supports Wi-Fi updates and WebUI configuration. RadioMaster also specifies CRSF and SBUS serial output options and a reserved four-pin CRSF interface for compatible telemetry-sensor expansion.

ER8G Variant Without Built-In Vario

The ER8G does not include the built-in Vario air-pressure sensor specified for the separate ER8GV variant. Select the correct model when Vario functionality is required or prohibited.

RF and Interface Specifications

Model	RadioMaster ER8G
Product Type	2.4 GHz ExpressLRS PWM receiver
PWM Outputs	8 channels
Wireless Protocol	ExpressLRS; version 3.3.0 pre-installed
Telemetry Power	Maximum 100 mW, LUA adjustable
Antenna Arrangement	Dual 20 cm high-sensitivity antennas
Serial Output	CRSF / SBUS
Expansion Interface	Reserved four-pin CRSF interface
Built-In Vario	No; Vario is a feature of the separate ER8GV variant

Electrical and Physical Specifications

Receiver Power Supply	DC 3.5-8.4 V
External Battery Voltage Detection	DC 4.0-35 V; sensing range only, not receiver supply voltage
Connector Pitch	2.54 mm
Dimensions	60 × 13.5 × 13 mm
Weight	12 g

Integration Notes

Use a compatible 2.4 GHz ExpressLRS transmitter or transmitter module.
Power the receiver within DC 3.5-8.4 V. Do not connect the higher external battery sensing voltage to the receiver supply input.
Check PWM channel assignments, serial-output configuration, servo power requirements, and antenna placement before operation.
If built-in Vario telemetry is required, verify the separately designated ER8GV model rather than assuming it is present in the ER8G.

FAQ

Is the RadioMaster ER8G a video transmitter?

No. It is a 2.4 GHz ExpressLRS radio receiver with eight PWM outputs. The maximum 100 mW specification refers to receiver telemetry power, not FPV video transmission.

Does the ER8G have a built-in Vario sensor?

No. RadioMaster identifies the built-in Vario air-pressure sensor as a feature of the separate ER8GV variant, not the ER8G.

What is the ER8G receiver supply range?

The receiver requires DC 3.5-8.4 V. Its DC 4.0-35 V external battery specification describes voltage detection only and is not the receiver power-supply range.

How many PWM channels and antennas does the ER8G have?

It provides eight PWM channels and uses dual 20 cm high-sensitivity antennas.

Which serial and configuration features are listed?

RadioMaster lists CRSF and SBUS serial output, a reserved four-pin CRSF interface, Wi-Fi updates, and WebUI configuration for the ER8G.

B2B Procurement FAQ

How should the variant be specified in a purchase inquiry?

Specify RadioMaster ER8G 2.4 GHz ExpressLRS eight-channel PWM receiver. State ER8G explicitly to avoid substitution with the separate ER8GV Vario variant.

What details should be checked before placing a bulk order?

Confirm the exact ER8G variant, required quantity, firmware version, supplied accessories, packaging, and commercial terms during quotation.

Are samples, MOQ, lead time, or customization available?

Sample availability, minimum order quantity, lead time, and customization options must be confirmed during quotation.

Can compliance documents be provided?

Required compliance documents and their applicability to the ordered version and destination market must be confirmed during quotation.