EMLID Reach RS4 vs RS3: RTK GNSS Receiver Comparison
An expert comparison to help you choose the right equipment for your project.
| Feature | EMLID Reach RS4 | EMLID Reach RS3 |
|---|---|---|
| Frequencies | L1/L2/L5/L6 all-band (672 channels) | L1/L2 dual-band (184 channels) |
| Accuracy | RTK 7 mm + 1 ppm H / 14 mm + 1 ppm V | RTK 7 mm + 1 ppm H / 14 mm + 1 ppm V |
| Tilt Compensation | Yes — RTK + 2 mm + 0.3 mm/° | Yes — RTK + 2 mm + 0.3 mm/° |
| Constellations | GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC | GPS/QZSS, GLONASS, Galileo, BeiDou |
| Battery | 16 h RTK rover with tilt (22 h logging) | 18 h RTK rover with tilt (22 h logging) |
| Weight | 927 g | 950 g |
| Connectivity | Bluetooth 5.1, Wi-Fi, global LTE, LoRa, 2 W UHF | Bluetooth 4.0, Wi-Fi, global LTE, LoRa (UHF receive-only) |
| Service Pricing | Contact for pricing | Contact for pricing |
Pricing shown reflects average US rates — indicative ranges, not a quote. Actual costs vary by location based on local market conditions, regulations, and project logistics — both within the US and internationally. Get a custom quote
EMLID Reach RS4
Latest multi-band RTK receiver with tilt compensation
The EMLID Reach RS4 is an all-band GNSS receiver supporting L1/L2/L5/L6 across 672 channels, with tilt compensation, delivering 7 mm + 1 ppm horizontal RTK accuracy for surveying and drone ground control.
Pros
- All-band L5/L6 support
- Tilt compensation
- 672 channels and NavIC tracking
- IP68 and -40°C to +65°C
- Transmitting UHF radio up to 2 W
Cons
- Higher cost
- Same published RTK precision as the RS3
- Two hours less rover autonomy than the RS3
- Premium features may be unused
Best For
EMLID Reach RS3
Reliable dual-band RTK receiver for surveying
The EMLID Reach RS3 is a proven dual-band GNSS receiver with the same published RTK precision as the RS4 and the same tilt compensation, for surveying and drone ground control applications.
Pros
- Proven reliability
- Lower cost
- Longest rover autonomy at 18 h
- Same tilt compensation as the RS4
- Same published RTK precision
Cons
- L1/L2 only — no L5 or L6
- 184 channels vs 672
- No NavIC
- UHF is receive-only and needs a separate antenna
Best For
Our Expert Verdict
Both receivers publish identical RTK precision (7 mm + 1 ppm horizontal, 14 mm + 1 ppm vertical) and the same tilt compensation. What the RS4 adds is signal and radio coverage: L5 and L6, 672 channels against 184, NavIC, IP68 sealing and a transmitting 2 W UHF radio. The RS3 actually runs two hours longer as a rover and costs less.
Choose EMLID Reach RS4 if...
Choose RS4 when the sky is difficult — canopy, urban canyons — where L5/L6 and 672 channels help hold a fix, or when you need a transmitting UHF radio rather than a receive-only one.
Choose EMLID Reach RS3 if...
Choose RS3 for standard surveying in open sky, for the longest rover day of the two, and when budget is a consideration — you are not giving up tilt compensation or published precision.
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Frequently Asked Questions
What is tilt compensation?
Tilt compensation allows accurate measurements without perfectly levelling the pole, saving time and reducing errors in the field. Both the RS3 and the RS4 publish it at RTK + 2 mm + 0.3 mm per degree of tilt; Emlid publishes no maximum tilt angle for either.
Do I need L5 frequency support?
L5 and L6 add signals that help the receiver hold a fix where the sky is obstructed. Standard open-sky surveying works fine with the RS3's L1/L2.
Does the RS3 have tilt compensation?
Yes. Emlid publishes tilt compensation on the RS3 at RTK + 2 mm + 0.3 mm/°, the same figure as the RS4. It is the RS2+ that has no tilt-compensation row on its datasheet.
Are both compatible with drone workflows?
Yes, both integrate well with drone mapping workflows for GCP collection and RTK base station use.
What about RS2+?
The RS2+ is Emlid's entry-level option — capable for basic work, with the same published RTK precision, but its datasheet lists no tilt compensation.
Which does THE FUTURE 3D use?
We use RS4 for professional surveying and GCP collection, leveraging tilt compensation for efficiency.
Professional Equipment In This Comparison
The professional equipment in this comparison, compared spec by spec. Specifications shown are the manufacturers' published figures. Models THE FUTURE 3D operates are identified on their own pages.
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Professional Services Using This Equipment
The Future 3D delivers these professional services with its own equipment fleet — each service page names the instruments we deploy.
Drone Photogrammetry
Aerial 3D mapping, orthomosaic creation, and terrain modeling
LiDAR Drone Surveying & Mapping
Survey-grade topographic mapping with RTK accuracy
Drone Inspections
Safe, efficient roof, facade, and infrastructure inspections
Industries That Benefit From This Technology
EMLID Reach RS4 and EMLID Reach RS3 technology drives innovation across these key industries.
Real Estate
Immersive property tours and marketing assets
Construction
As-built documentation, progress monitoring, and scan data for BIM
Hospitality
Hotel virtual tours and event space showcases
Warehouses & Logistics
Warehouse documentation and facility planning
Sports & Entertainment
Stadium documentation and venue tours
Utilities
Infrastructure mapping and corridor surveys
Available Nationwide
The Future 3D provides professional 3D scanning services across the United States.
Florida (Headquarters)
Northeast
West Coast
South & Midwest
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