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- i85 vs Reach RS4
CHCNAV i85 vs Emlid Reach RS4
What i85 does better (1) and where Reach RS4 wins (2) — every spec side by side.
Why is i85 better than Reach RS4?
- Battery life20 h vs 16 h+25%
Why is Reach RS4 better than i85?
- RTK accuracy (horizontal)8 mm vs 7 mm+14%
- Satellite systems supported5 vs 6+20%
Specifications
Side by side
| Satellite positioning | ||
| Satellite systems | GPS, GLONASS, Galileo, BeiDou, QZSS | GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC (IRNSS) |
| Satellite systems supported | 5 | 6 |
| Multi-band GNSS (L1 + L5/L2) | Yes | Yes |
| Frequency bands | L1, L2, L5, E1, E5a, E5b, E6, B1, B2, B3 | L1, L2, L5, E1, E5a, E6, B1, B2, B3 |
| Tracking channels | 1,892 | — |
| SBAS (WAAS / EGNOS) | Yes | — |
| RTK positioning | Yes | Yes |
| RTK accuracy (horizontal) | 8 mm | 7 mm |
| RTK accuracy (vertical) | 15 mm | — |
| Tilt compensation (IMU) | Yes | Yes |
| Max. tilt angle | 60° | — |
| Dual-antenna heading | Yes | — |
| Correction sources | NTRIP (internet), UHF radio, L-band / PPP, SBAS | NTRIP (internet), UHF radio, LoRa radio |
| Built-in UHF radio | Yes | Yes |
| L-band / PPP corrections | Yes | — |
| Maps & navigation | ||
| Internal storage | 8 GB | — |
| Connectivity & safety | ||
| Wi-Fi | Yes | — |
| Bluetooth | Yes | — |
| NFC | Yes | — |
| USB-C | Yes | Yes |
| Camera | Yes | — |
| Battery & power | ||
| Battery life | 20 h | 16 h |
| Battery capacity | 4,900 mAh | — |
| Power source | Built-in rechargeable | — |
| External power input | 5V / 2A | — |
| Build & durability | ||
| Protection rating | IP68 | IP68 |
| Water protection (IPx) | IPx8 | IPx8 |
| MIL-STD-810 | Yes | — |
| Drop resistance | 2 m | — |
| Operating temperature (min) | -40 °C | -40 °C |
| Operating temperature (max) | 65 °C | 65 °C |
| Weight | 800 g | — |
| Width | 134 mm | — |
| Height | 86 mm | — |
| Depth | 134 mm | — |
| Housing material | Metal (all-in-one design) | Magnesium alloy |
