RLKA001001

Overview

The RadioLink PRM-03 OSD Telemetry Sensor (RLKA001001) is a sophisticated lightweight telemetry module designed for RC enthusiasts in the UK who demand real-time flight data monitoring and on-screen display capabilities. Weighing just 1 gramme, this compact sensor delivers essential flight information directly to your transmitter screen, helping you keep complete control of your model at all times. Whether you're flying fixed-wing aircraft, multirotor drones, or operating advanced RC models through PIX and APM flight controllers, the PRM-03 transforms your flying experience by providing comprehensive telemetry data that was previously unavailable to many RC operators in the UK market.

The RadioLink PRM-03 is purpose-built for compatibility with RadioLink's AT9S and AT10II transmitters, and can be retrofitted to earlier AT9 and AT10 models when updated with the latest firmware versions. This makes it an ideal upgrade for existing RadioLink users seeking to enhance their setup with professional-grade telemetry capabilities. The module's lightweight design ensures minimal impact on your model's weight and balance, whilst delivering the rich data streams that serious RC hobbyists demand. For RC car UK enthusiasts and drone operators alike, this telemetry sensor provides the monitoring tools needed for safer, more informed flying and operation.

With its ability to relay position, power, attitude, speed, altitude and distance information, the PRM-03 represents genuine innovation in accessible RC telemetry. The compact dimensions (33mm × 15mm × 9mm) mean installation in even tight spaces is straightforward, and the single gramme weight makes it suitable for performance-critical applications where every milligram counts. This is the telemetry solution for RC enthusiasts who refuse to compromise on data quality or weight penalty.

Key Features

• OSD Telemetry Display — Real-time on-screen display of critical flight data directly on your RadioLink transmitter screen, eliminating the need for external monitoring devices and keeping all essential information visible at a glance during flight operations.
• Lightweight Design at 1 Gramme — The featherweight construction minimises any negative impact on your model's performance, weight distribution and flight characteristics, making it ideal for weight-sensitive applications where every gramme matters to your RC experience.
• Comprehensive Flight Data — Transmits speed, climb rate (rise), throttle position, voltage, latitude, longitude, altitude, GPS mode, yaw angle, roll angle, pitch angle, distance and RSSI signal strength in real time, giving you complete situational awareness.
• Battery Monitoring Integration — Connect directly to your flight battery to monitor voltage in real time, similar to the PRM-01 module, allowing you to track battery health and remaining capacity throughout your flight session.
• AT9S and AT10II Compatibility — Fully compatible with RadioLink's latest AT9S and AT10II transmitters, with backward compatibility to AT9 and AT10 models when firmware is updated to AT9 version 1.2.6 (OSD) or AT10 version 1.0.6 (OSD).
• PIX and APM Flight Controller Support — Works seamlessly with popular open-source flight controllers including PIX and APM, making it an excellent choice for drone builders and advanced RC aircraft operators using these platforms.
• Compact and Discrete Form Factor — Measuring just 33mm long, 15mm wide and 9mm tall, the PRM-03 fits into confined spaces within your aircraft or multi-rotor without requiring major structural modifications or significant rework of your installation.
• GPS Integration — Full GPS telemetry support provides accurate position tracking, altitude monitoring and distance calculation, essential for long-range operations and precision flying where knowing exact position is critical.

Technical Performance

The RadioLink PRM-03 OSD Telemetry Sensor represents a pinnacle of compact telemetry engineering, delivering professional-grade monitoring capabilities in an extraordinarily lightweight package. At just 1 gramme, this module achieves what many manufacturers consider impossible — comprehensive multi-parameter telemetry transmission with negligible weight penalty. The sensor interfaces with your flight battery to provide real-time voltage monitoring, critical for lithium polymer and lithium ion battery chemistry where voltage sag during flight can impact performance and battery longevity. The module's ability to capture and transmit GPS coordinates (latitude and longitude) alongside altitude data provides three-dimensional position awareness, essential for long-range flying and precision navigation. The attitude telemetry — yaw, roll and pitch angles — gives pilots complete understanding of their model's orientation at all times, whilst speed, climb rate and throttle position data provide performance metrics that help optimise flying technique and diagnose control issues. RSSI (Received Signal Strength Indicator) monitoring allows pilots to track radio link quality in real time, warning of potential signal degradation before loss of control occurs. The module's 33mm length, 15mm width and 9mm height dimensions make it one of the most compact telemetry solutions available in the RC hobby market, fitting into fuselages, frames and compartments where larger modules would simply not fit. When paired with RadioLink's AT9S, AT10II or firmware-updated AT9 and AT10 transmitters, the PRM-03 delivers its telemetry data directly to the transmitter's on-screen display, eliminating the need for separate ground station hardware or laptop computers. For PIX and APM flight controller users building advanced drones and autonomous aircraft, this module provides the essential data bridge between flight controller and operator.

What's in the Box

• RadioLink PRM-03 OSD Telemetry Sensor module
• Connection cables and connectors for flight controller integration

What You Need to Complete

• RadioLink AT9S, AT10II, AT9 or AT10 transmitter (AT9 and AT10 require firmware updates to V1.2.6 OSD and V1.0.6 OSD respectively)
• Compatible flight controller: PIX or APM
• Flight battery for operation and voltage monitoring
• RC aircraft, multirotor or RC model equipped with compatible flight controller

Frequently Asked Questions

• Is the RadioLink PRM-03 suitable for beginners to RC telemetry? — Yes, the PRM-03 is an excellent entry point into telemetry monitoring for RC enthusiasts. Its straightforward installation and automatic data display on compatible RadioLink transmitters means beginners can benefit from real-time flight data without complex software configuration or ground station setup. Simply install the module, connect it to your flight controller, and telemetry data appears on your transmitter screen immediately.
• What transmitters work with the RadioLink PRM-03 telemetry module? — The PRM-03 is fully compatible with RadioLink AT9S and AT10II transmitters. Earlier AT9 and AT10 transmitters can use the module when upgraded to firmware version 1.2.6 (for AT9 OSD mode) or version 1.0.6 (for AT10 OSD mode). These firmware updates enable the OSD telemetry display functionality on older transmitter models.
• Can I use the PRM-03 for battery monitoring like the PRM-01? — Absolutely. The RadioLink PRM-03 can be connected directly to your flight battery to provide real-time voltage monitoring, allowing you to track battery health and remaining capacity throughout your flight session. This is the same battery monitoring capability found on the PRM-01 module, helping you manage lithium polymer and lithium ion battery chemistry safely.
• What flight data does the PRM-03 transmit to my transmitter screen? — The module transmits a comprehensive array of flight data including speed, climb rate (rise), throttle position, battery voltage, RSSI signal strength, GPS latitude and longitude coordinates, altitude above sea level, GPS mode status, aircraft attitude angles (yaw, roll and pitch), and calculated distance from launch point. This gives you complete situational awareness during flight.
• How much does the PRM-03 weigh and will it affect my model's performance? — At just 1 gramme, the PRM-03 is one of the lightest telemetry modules available and has minimal impact on your model's weight distribution and flight performance. For weight-sensitive applications like lightweight fixed-wing aircraft or racing drones, this negligible weight penalty makes the PRM-03 an excellent choice for adding telemetry without sacrificing speed or manoeuvrability.
• Is the RadioLink PRM-03 waterproof for outdoor flying? — While the module is designed for robust outdoor use with RC aircraft and drones, specific waterproofing ratings are not detailed in the product specifications. For wet weather flying or water-proximity operations, we recommend contacting our team at RC Model Shop for advice on protective measures.
• What flight controllers are compatible with the PRM-03? — The RadioLink PRM-03 is designed for use with PIX and APM flight controllers, making it ideal for drone builders and RC aircraft enthusiasts using these popular open-source flight control platforms. This compatibility covers a wide range of multi-rotor and fixed-wing applications.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the RadioLink PRM-03 OSD Telemetry Sensor RLKA001001 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.