50-day return policy⌄
- Return within 50 days of purchase.
- Full refund for unopened, sealed, unactivated items.
- Opened products may still qualify if unused.
- For orders over £100, we can arrange your return via DPD or in-person drop-off.
Next-day delivery — order before 3pm⌄
- Order before 3pm Mon–Fri for next-working-day delivery (free over £99).
- UK Saturday delivery available on orders placed before 3pm Friday.
- After 3pm Friday — dispatched Monday.
- Some UK regions may need 2–3 working days.
Discounted options with main purchase⌄
- Bundle pricing on accessories, spares and training when bought together.
- Reduced rates on add-ons selected at checkout.
- Ask us for a tailored quote on multi-unit or fleet orders.
Emlid Reach RS4
The Emlid Reach RS4 is an IP68-rated multi-band RTK GNSS receiver delivering centimetre-level accuracy with fast tilt compensation for reliable fieldwork.
heliguy support & optional extras
Product dossier
Stable centimetre-level positioning in tough environments
Multi-band RTK accuracy
- All-band RTK:
Tracks L1/L2/L5/L6 signals from all constellations for stable accuracy in urban canyons, dense canopy, and tough conditions.
- Centimetre precision:
RTK accuracy of 7 mm + 1 ppm and tilt-compensated accuracy of 2 mm + 0.3 mm/°.
- Fast tilt compensation:
Next-gen IMU with 5× quicker initialisation for measuring without levelling the pole.
- Full constellation support:
Tracks GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC for reliable coverage worldwide.
Full specifications
Frequently asked questions
What level of accuracy does the Emlid Reach RS4 offer?⌄
The Emlid Reach RS4 provides centimetre-level accuracy, with RTK precision of 7 mm + 1 ppm and tilt-compensated accuracy of 2 mm + 0.3 mm/°, even under dense canopy or in challenging conditions.
Which satellite systems does the Emlid Reach RS4 support?⌄
The Emlid Reach RS4 supports all major constellations, including GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC, ensuring consistent accuracy and reliable signal tracking worldwide.
Can the Emlid Reach RS4 be used as both a base and rover?⌄
Yes, the Emlid Reach RS4 functions as both a base and rover, supporting 915 MHz LoRa, 450 MHz UHF, and NTRIP for flexible correction options.
How long does the Emlid Reach RS4 battery last?⌄
The Emlid Reach RS4 provides up to 16 hours of continuous operation and recharges easily via USB Type-C.
How durable is the Emlid Reach RS4?⌄
Built with a rugged magnesium alloy body and IP68 protection, the Emlid Reach RS4 is dustproof, waterproof, and operates in temperatures from -40°C to +65°C (-40°F to +149°F).
Does the Emlid Reach RS4 include tilt compensation?⌄
Yes, the Emlid Reach RS4 features advanced IMU tilt compensation, allowing accurate measurements without levelling the pole.
What are Emlid Flow and Emlid Flow 360? What do they offer?⌄
Emlid Reach RS4 can be used with the Emlid Flow and Emlid Flow 360 software platforms.
Emlid Flow
• iOS or Android
• Configure and manage Reach devices
• Set up base and rover
• Log raw data for post-processing
• Survey in the field.
Emlid Flow 360
• Any browser
• Prepare and manage projects
• Instantly share data between field and office
•Backup your work.
Emlid offers a single plan for Emlid Flow and Emlid Flow 360. Choose between the Free and paid-for (Pro) version.
Free plan - ideal for individuals or small teams needing high-precision GNSS.
• Receiver configuration
• Export & Import: CSV, DXF, SHP, KML
• Collect and stakeout points
• Coordinate systems and base shift tool
• Precise point collection
• Satellite and vector maps
• Unlimited projects with instant sync
• Collaboration tools: Up to 10 team members; team workspace for shared data and presets; data authorship.
Pro plan - for growing teams managing complex projects with advanced tools.
• Everything from Free.
• Work with CAD and DTM files
• Localization and COGO tools
• Linework with 4 stakeout modes
• Code libraries
• Reports, auto collection, and more
• File storage: 10 GB per user
• Collaboration tools: Unlimited team members; team workspace for shared data and presets; data authorship.
• £240 annually.
Common questions
- How durable is the Emlid Reach RS4?
- What makes the Emlid Reach RS4 Pro different from the RS4?
- How durable is the Emlid Reach RS4 Pro?
- How accurate is the Emlid Reach RS4 Pro?
- Does the Emlid Reach RS4 include tilt compensation?
- Which satellite systems does the Emlid Reach RS4 support?
