If you're comparing the Emlid Reach RS4 vs RS4 Pro, the short answer is that both receivers deliver the same high-accuracy GNSS, RTK capabilities, tilt compensation, and rugged field-ready performance, and the RS4 Pro adds dual cameras for AR-guided stakeout and image-based measurement. So the right choice comes down to how your team works in the field.
What the RS4 and RS4 Pro Have in Common
Both the Emlid Reach RS4 and Reach RS4 Pro are all-band RTK GNSS receivers designed for centimetre-level positioning. Both receivers include all-band GNSS positioning for improved performance under tree canopy and in urban environments, RTK and PPK workflows, high-accuracy IMU tilt compensation, base and rover functionality, built-in LoRa and UHF radios, LTE connectivity, IP68 protection, up to 16 hours of battery life, and operation in temperatures as low as -40°C.
Both receivers also work with the Emlid Flow app for collecting and staking out field data. You can learn more through Emlid's Reach RS4 documentation.
The RS4 generation also includes an updated GNSS antenna and chip, helping deliver faster fixes, better multipath resistance, and more reliable positioning in challenging environments. More details are available through the Emlid Community RS4 overview.
The Biggest Difference: RS4 Pro Cameras
The Emlid RS4 Pro includes dual Full-HD cameras with global shutters. The standard RS4 does not. Those cameras unlock two major workflows: AR-guided stakeout, and Visual Capture for measuring inaccessible points. This is really the deciding factor between the two receivers.
AR Stakeout: Faster Layout on Complex Sites
Stakeout can get complicated quickly on a busy construction site. Machinery, workers, rebar, traffic, and uneven terrain can all make finding a layout point slower than it should be.
With the RS4 Pro, AR stakeout helps guide you directly toward your target through Emlid Flow. As you approach the point, you receive real-time guidance for direction and distance. Once you're close, the system switches to a more precise camera view to help centre the target.
For teams working on construction, civil infrastructure, or busy job sites, this can make stakeout faster and more intuitive.
Visual Capture: Measure Points You Can't Reach
This is one of the most practical reasons to choose the RS4 Pro. There are plenty of points you can't safely or easily reach with a survey pole, including road edges with active traffic, excavation faces, points behind barriers or fences, areas near water or mud, utility structures, and locations near heavy equipment.
The RS4 Pro combines RTK positioning with camera-based measurement to capture coordinates from a safe distance. Visual Capture can achieve approximately 3 to 5 cm accuracy within 10 metres, making it useful for many as-built and verification workflows. You can learn more through Candrone's Emlid RS4 Pro weekly rental page.
Which Receiver Fits Your Field Workflow?
Choose the Emlid RS4 if:
The standard RS4 is a great fit for general land surveying, GIS data collection, topographic surveys, drone mapping, ground control point collection, environmental monitoring, base and rover RTK workflows, and standard stakeout on open sites.
For many drone survey programs, the RS4 is the better value. You get the same core GNSS performance as the Pro without paying for camera features you may not need.
Choose the Emlid RS4 Pro if:
The Pro is worth considering if your team regularly works on busy construction sites, performs stakeout in congested environments, measures points that are difficult or unsafe to access, works near roads, excavations, or heavy equipment, completes as-built verification, or wants image documentation tied to coordinate capture.
For construction, mining, infrastructure, and complex industrial sites, the RS4 Pro's camera capabilities can improve both productivity and safety.
Using the RS4 or RS4 Pro for Drone Surveying
Both receivers can also be used as RTK base stations or rovers for drone survey workflows. They can provide corrections for compatible drones, support ground control collection, and integrate with third-party devices.
This makes either receiver a strong option for drone mapping teams that need a flexible GNSS solution in the field. You can review the full technical specifications through Emlid's RS4 specifications page.
Not Sure Which One You Need? Try It First
Don't upgrade to the RS4 Pro just because it has more features. Upgrade because those features solve a real problem for your team.
If you're mainly focused on surveying, drone mapping, GIS, and standard RTK workflows, the Emlid RS4 gives you the same excellent positioning performance at a lower cost. If your work involves complex stakeout, inaccessible measurement points, or challenging job sites, the RS4 Pro can be worth the investment.
Candrone offers both receivers as weekly rentals, so you can test them on a real project before making a purchase decision:
You can also explore the Emlid RS4 Pro product page.
In short, the RS4 is the right choice for most standard survey and drone mapping workflows, and the RS4 Pro is the better choice when AR stakeout and camera-based measurement can save your team time, improve safety, or help you access points you simply can't reach with a pole.
