Radiomaster ERS-BA01 Barometric Altitude Sensor

Overview:
The RadioMaster ERS-BA01 is a compact barometric altitude sensor designed to add reliable altitude telemetry to ExpressLRS PWM receiver systems. It measures atmospheric pressure and converts this into relative altitude information, which is transmitted via the CRSF telemetry protocol to a compatible EdgeTX radio. Its small size and low power draw make it suitable for fixed-wing aircraft, multirotors and other RC models where accurate altitude feedback enhances situational awareness.

The ERS-BA01 is suited to pilots who want dependable altitude data integrated directly into their ExpressLRS telemetry setup for enhanced flight awareness and post-flight analysis.

Features:
- Provides real-time altitude telemetry by converting barometric pressure into relative altitude data for telemetry display.
- Plug-and-play connectivity with compatible ExpressLRS PWM receivers via CRSF for seamless telemetry transmission.
- Pass-through expansion ports allow daisy-chaining of additional ERS sensors without rewiring.
- Compact and lightweight form factor that suits installations with limited space or strict weight budgets.

Specification:
- Model: Radiomaster ERS-BA01 Barometric Altitude Sensor
- Operating voltage: 5–8.4V
- Typical operating current: 9mA
- Altitude accuracy: ±0.5m
- Operating temperature range: −10℃ to +85℃
- Dimensions: 23.5×13×7mm
- Weight: 3.5g

Included:
- 1x Radiomaster ERS-BA01 Barometric Altitude Sensor
- Accessories