Emlid Reach RS4 Pro RTK GNSS Receiver
RTK GNSS receiver
Bring visual guidance to field surveying. Reach RS4 Pro adds two Full HD cameras to an all-band RTK receiver for AR-assisted stakeout and measuring selected points from captured images.
$4,599.00
USDAvailable to order
Delivery
Standard shipping is available to the contiguous 48 states and Washington, DC. Shipping charges are shown at checkout before payment. Orders of $6,500 or more after discounts qualify for free standard shipping.
Warranty & returns
Request a return within 10 days of delivery. Customers pay change-of-mind return shipping; opened change-of-mind returns have a 20% restocking fee. GroDrones covers return shipping for incorrect items, products that arrived damaged or defective, and approved warranty returns. Contact us before shipping a return. See our return policy.
- Dual cameras
- AR stakeout and visual capture
- Tilt compensation
- IMU-assisted measurement
- 16 hr
- Rated operating time
- IP68
- Receiver protection rating
Manufacturer-rated performance. Accuracy, battery life and radio performance depend on setup and site conditions.
Overview
For construction layout and sites with difficult access, RS4 Pro combines conventional GNSS measurements with camera-assisted tools in Emlid Flow. Use it as a rover for field collection or as a base, with radio and network correction options for compatible equipment.
See the point you are staking
AR stakeout overlays guidance on the camera view. Tilt compensation must be enabled, and compatible software and a fixed RTK solution are required.
Capture points from images
Visual capture lets you measure selected features from multiple views. Follow Emlid’s capture-distance and overlap guidance; this is not a replacement for every survey method.
Connect and record
LoRa, UHF and NTRIP support correction delivery. RINEX logging preserves raw observations for compatible post-processing.
Official resources
What’s included
Included items and compatible accessories.
What’s included?
- Reach RS4 Pro receiver × 1
- Carrying case × 1
- USB Type-C cable × 1
- LoRa antenna, 860–930 MHz × 1
- UHF antenna, 410–470 MHz × 1
Survey pole, tripod, phone or tablet, USB power adapter and cellular data plan are sold separately.
Compatibility and setup
Use current compatible Emlid Flow software on an iOS or Android device. AR stakeout and visual capture require an RTK FIX solution and enabled tilt compensation. A compatible base or network service supplies corrections. Match radio frequencies, protocols and firmware. Advanced Emlid Flow features such as linework, CAD/DTM tools and stakeout reports require a separate paid plan.
The basic Emlid Flow app is available without a paid software plan. Correction-network access and advanced software features may require separate service subscriptions.
Specifications
The details that matter when choosing your equipment.
| Model | Reach RS4 Pro |
|---|---|
| Supplier SKU | RCH402 |
| Role | Base or rover |
| GNSS | All-band, 672-channel GNSS |
| Receiver weight | 2.08 lb (943 g) |
| Receiver dimensions | 5.06 × 5.06 × 3.91 in (128.6 × 128.6 × 99.3 mm) |
| Corrections and communications | LoRa and UHF transmit/receive; NTRIP |
| RTK accuracy | Horizontal: 0.28 in + 1 ppm (7 mm + 1 ppm); vertical: 0.55 in + 1 ppm (14 mm + 1 ppm) |
| Tilt accuracy | RTK + 0.079 in + 0.012 in per degree (RTK + 2 mm + 0.3 mm per degree) |
| Rated operating time | 16 hours as an RTK rover with tilt compensation |
| Internal battery | 36 Wh lithium-ion, 5,000 mAh at 7.2 V |
| Charging | USB-C Power Delivery, 5/9/12/15 V, 3 A |
| Raw data logging | RINEX, 16 GB internal storage |
| Cameras | Two Full HD cameras for supported AR stakeout and visual-capture workflows |
| Ingress protection | IP68 |
| Operating temperature | -40 to 149°F (-40 to 65°C) |
RTK precision requires suitable satellite reception and valid corrections. Obstructions, multipath, correction quality and baseline distance affect results. Tilt adds the stated error term to RTK accuracy. Rated endurance varies with radio use, temperature and operating configuration. Follow Emlid’s care instructions for the receiver’s ingress-protection rating.