Emlid Reach RS4 & RS4 Pro Base and Rover Kit | RTK GNSS

Welcome to the peak of commercial surveying efficiency, or at least the closest you'll get until clients stop changing project scopes. If you are building a reliable RTK GNSS setup, this base and rover kit pairs the workhorse Reach RS4 with the absurdly over-engineered Reach RS4 Pro. Whether you're pulling corrections via an NTRIP caster, running PPK workflows for drone mapping, or exporting RINEX and RTCM3 data to justify your invoice, this kit does the heavy lifting. The RS4 sits as your steadfast base, while the RS4 Pro rover takes the field with tilt compensation and dual-camera AR guidance. We’ve spent 10 years supplying commercial FPV and surveying systems to the UK, which means we know exactly how miserable fieldwork in freezing drizzle can be. Buy this so we can keep the lights on, and you can get out of the mud faster.

Key Highlights

• Dual Full-HD Cameras: Global shutter sensors provide AR guidance for stakeout and allow precise measurements directly from images.
• Unyielding Precision: Delivers RTK accuracy of 7 mm + 1 ppm, bolstered by IMU tilt compensation (2 mm + 0.3 mm/°) so you can stop staring at the bubble level.
• All-Band Support: Tracks 672 channels across GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC. If it’s in orbit, you’re using it.

Why You Need a Proper RTK GNSS Setup

Because your time is expensive and manual stakeouts are tedious. The Reach RS4 Pro transforms your surveying workflow by overlaying digital stakeout points onto a real-world video feed—like a video game waypoint, but for actual money. Wrapped in a magnesium alloy body with an IP68 rating, this kit is built to survive the absolute worst of British weather, operating flawlessly from -40 to +65°C. With 16 hours of battery life on a single charge, it will comfortably outlast your own will to work.

Specifications

• Weight: 943 g (2.08 lb) per unit
• Dimensions: 128.6 x 128.6 x 99.3 mm
• Battery: Li-Ion 5000 mAh, 7.2 V, 36 Wh (16 hours autonomy as RTK rover with tilt)
• Ingress Protection: IP68
• Radios: 868/915 MHz LoRa (Up to 1W / 8 km) & 410 - 470 MHz UHF (Up to 2W, TRIMTALK 450S protocol)
• LTE Modem: Global coverage, Nano-SIM support
• Positioning: RTK (H: 7 mm + 1 ppm | V: 14 mm + 1 ppm), PPK, and Static
• Field of View: Front camera H: 64.6°, V: 42.8° | Bottom camera H: 63°, V: 42°

FAQ

Can I use this kit for both NTRIP and local radio corrections?

Yes. The Reach RS4 base and RS4 Pro rover kit supports both NTRIP for cellular network corrections via the built-in global LTE modem, as well as local transmission. It features integrated 868/915 MHz LoRa and 410-470 MHz UHF radios, ensuring you maintain a fixed RTK solution whether you have cell service or are stranded on a remote site.

What’s in the Box*

• 1× Reach RS4 Pro
• 1× Reach RS4
• 2× Carrying case
• 2× USB Type-C cable
• 2× LoRa Antenna 860-930 MHz
• 2× UHF Antenna 410-470 MHz
• 2× Quick release adapter
• 1× Reach RS4 Bumper
• 1× Reach RS4 Pro Bumper

Disclaimer

Yes, this equipment is incredibly accurate, but we are not legally responsible if your client insists on building a retaining wall on their neighbour's property. Also, ensure you attach the correct antenna (LoRa or UHF) for your setup—unless you genuinely enjoy pacing around a muddy site wondering why your rover is permanently stuck in 'Float' without receiving any corrections.

Still Here?

Stop overthinking the spec sheet. The CAA paperwork isn't getting any shorter, and the site isn't going to survey itself. Add this kit to your cart, expense it to the company, and let the hardware do the heavy lifting.