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.

Emlid Reach RS4

£0.00

Tax included in UK & Shipping calculated at checkout

Pre-order now. Stock expected December 2025.

50-days return policy
Return your item within 50 days of purchase.
Full refund available for unopened, sealed, and unactivated items.
Opened products may still qualify for a refund - if unused.
For orders over £100, heliguy™ can arrange your return via DPD or in-person drop-off - just contact us.
Next-day delivery - order before 3 pm
Order before 3pm (Monday–Friday) for next-working-day delivery across most of the UK*. Free on orders over £99.
UK Saturday delivery (at additional cost) available on orders placed before 3pm Friday*.
Orders placed after 3pm Friday dispatched on Monday.
No deliveries on Sundays or Bank Holidays.
* Some UK regions - such as Northern Ireland, Channel Islands, Isle of Man, Scottish Highlands & Islands, and Scilly Isles - may require 2-3 working days for delivery.

The Reach RS4 is an IP68-rated, multi-band RTK GNSS receiver that delivers centimetre-level accuracy in any environment. With fast tilt compensation and robust connectivity, it’s designed for reliable, efficient fieldwork.

All-band support L1/L2/L5/L6 signals across all satellite systems for stable accuracy.
Fast tilt compensation Next-gen IMU with 5× quicker initialisation.
Reliable GNSS solution IP68 magnesium alloy body with LTE, Wi-Fi, Bluetooth, and multi-band radio.
Upgrade to the RS4 Pro Adds vision-based AR stakeout and image measurement for advanced workflows.
Specialist survey support Our in-house team provides guidance on integrating the Emlid ecosystem into your workflows, with end-to-end capture advice and data-processing support.

Overview
Contents
Specifications
FAQ

Multi-band precision and field-ready performance

A powerful GNSS receiver built for accuracy, speed, and reliability

All-band RTK reception: Tracks L1/L2/L5/L6 signals from all constellations for stable accuracy in urban canyons, dense canopy, and tough conditions.
Fast tilt compensation: Next-gen IMU with 5× quicker initialisation for measuring without levelling the pole.
Built for the field: Magnesium alloy body with IP68 protection and replaceable bumpers for extra durability.
Seamless iOS integration: MFi certified for use with iOS apps, including Esri ArcGIS.
Quick-release mount: Secure 5/8” thread design for fast, accurate setup, even when tilted.
Advanced connectivity: Diversity LTE, dual-band Wi-Fi, and Bluetooth ensure a clean signal and reliable fix.
Flexible radio system: Up to 2W multi-band radio, interoperable with third-party gear, supporting both licensed and license-free bands.

Recommended Extras for the Emlid Reach RS4

Complete your purchase with...

Emlid Quick-Release Adapter

Quick-release adapter for the Reach RX2, RS4, and RS4 Pro, designed for fast, secure, and reliable setup in the field.

Emlid Survey Pole

Retractable survey pole that can fully extend to 1.8 metres and fits most control devices.

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