The Emlid Reach RS3 is a survey-grade RTK GNSS receiver with IMU-based tilt compensation, enabling centimetre-accurate point collection at up to 60° of tilt — no bubble-checking required. Equally capable as a base or rover, it supports LoRa radio, LTE NTRIP, and UHF for flexible deployment across any survey environment.
Centimetre accuracy in any position — the RS3 keeps you on target even when your pole isn't perfectly vertical.
Features
- IMU-based tilt compensation delivers centimetre accuracy at up to 60° of tilt, with no calibration required — each unit is factory-calibrated out of the box
- Immune to magnetic disturbances, making tilt compensation reliable near metal structures, vehicles, and reinforced surfaces
- Fast 5-second fix time maintains robust performance even with partial sky obstruction or receiver tilt
- Operates as both a base and rover — switch between LoRa radio (up to 8 km), LTE NTRIP, and UHF (receive-only) correction links
- Built-in LTE modem with nano-SIM slot for direct CORS network and NTRIP caster connectivity in the field
- RINEX logging with PPK support, compatible with Emlid Studio, OPUS, AUSPOS, and third-party PPP services
- 16 GB internal storage supports over 160 days of logging at 1 Hz
- Up to 22 hours battery life; charges via USB-C and accepts external power banks for multi-day operation
- IP67 waterproof, impact-resistant polycarbonate and elastomer body rated for -20 to +65°C
- Tracks 184 channels across GPS, GLONASS, BeiDou, Galileo, and QZSS on L1 and L2
Specifications
| Dimensions | 126 × 126 × 142 mm |
| Weight | 950 g |
| Operating temperature | -20 to +65°C |
| Ingress protection | IP67 |
| Battery | Li-Ion 5200 mAh, 7.2 V (37.44 Wh) |
| Battery life | 22 hrs logging / 18 hrs RTK rover with tilt |
| Charging | USB Type-C, 5 V / 3 A |
| GNSS signals | GPS/QZSS L1C/A, L2C · GLONASS L1OF, L2OF · BeiDou B1I, B2I · Galileo E1B/C, E5b |
| Channels | 184 |
| Update rate | Up to 10 Hz |
| Convergence time | ~5 seconds (typically) |
| Static accuracy (H / V) | 4 mm + 0.5 ppm / 8 mm + 1 ppm |
| PPK accuracy (H / V) | 5 mm + 0.5 ppm / 10 mm + 1 ppm |
| RTK accuracy (H / V) | 7 mm + 1 ppm / 14 mm + 1 ppm |
| Tilt RTK accuracy | ±2 mm + 0.3 mm/° |
| Tilt range | Up to 60° |
| Radio (LoRa) | 868/915 MHz, up to 8 km range |
| UHF radio | 410–470 MHz receive-only (TRIMTALK 450S), antenna sold separately |
| LTE modem | Global bands, nano-SIM |
| Wi-Fi | 802.11 b/g/n |
| Bluetooth | 5.4 |
| Ports | RS-232, USB Type-C |
| Internal storage | 16 GB |
| Data formats | RINEX, NMEA, LLH/XYZ, UBX |
| Corrections | NTRIP, RTCM3 |
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