Kolida K58 Plus

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Kolida K58 Plus / UFO, 692 Channels Gnss Receiver, Dual Battery, Adopt advanced UHF data link technology, proven low-elevation tracking technology and on-board multipath mitigation. Enhance radio work range.

Kolida K58 PLUS GNSS Receiver

The advantage of lower price and better performance are depending on the reasonable and optimizing design to the subassemblies and components.
K58Plus/UFO combines the extraordinary GNSS signal tracking and processing technology of high-end equipment and the economy of an entry-level equipment.
Its superior flexibility and long endurance make it be a high-performance system to meet your diverse work needs on both simple and complex projects.
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 VIDEO  Contents

     692 Channels, B3 Supported.

With the latest developed 440 channels BEIDOU GNSS board inside, K5UFO maximizes the utility of BEIDOU (COMPASS)     

signal, the data acquisition speed and GNSS signal stability are greatly improved.


Barrier-Free Measurement

In difficult environment you may lost connection with base station or VRS network.

Don't be disappointed, you can choose from 3 creative work modes to continue surveying without interruption.

(Repeater/ Router/ Mobile Refenrence Station)

Long Range  Radio Link

SDL400 built-in radio can send signal as far as 7 km in urban area, 8 km in suburban.

The maximum coverage is up to 200 sq.km, suitable to have multiple rovers work simultaneously.


SDL400 built-in radio features anti-interference capability, so K5UFO can work close to power plant,

transformer substation, mobile signal tower and other interference source.

The Best in Town

To improve the performance in city survey, R&D team upgraded the network module from 3G to 4G. 

Under 4G mobile network, data transmission is faster and more stable. SUPER RTK is still compatible with 3G and 2G.

Practical Functions

See what others can't. K5UFO employs Linux system, it helps surveyors to accomplish their missions easier,

faster and more accurate by delivering exceptional quality and innovative features.

(The Tilt Survey function is optional, not included in default configuration)


New app.   New Productivity

Windows CE data controller is too old technology? 

No problem. Simply download SurvX App on your smart phone or tablet.

Enjoy the smooth operation of Android platform


Post-processing Sw.   Free of Charge

KOLIDA GEO Office integrates 

static data processing & Kinematic data adjustment


Embedded Linux platform (optional)

Supports multi-threaded operation mode, faster operation, lower power consumption, intelligent control of operating status, open development of data interfaces, support for secondary development, and user convenience. You can customize the function according to your own situation, and have the possibility and availability of unlimited expansion of equipment.


Full-featured radio

Send and receive integrated integrated full-featured internal radio, typical operating distance of 5 kilometers, to meet the needs of conventional operations, support for radio relay and network routing capabilities, effectively extending the working distance. Network and radio relay mode: The mobile station broadcasts the received network or station differential signal again through the internal radio station and distributes it to other mobile stations.


NFC flash touch pairing technology

The new NFC flash touch pairing technology enables quick pairing with the hands-on book to get rid of the complicated Bluetooth search and connection process in the past. With a single touch, you can successfully pair. The quick connection between the console and the host solves this problem.


Dual-mode long-distance Bluetooth

The industry’s first Bluetooth connectivity technology, equipped with 4.0 standard dual-mode long-distance Bluetooth, can connect mainstream mobile phones, tablets and other digital products, and is compatible with the 2.1 standard, connecting hands. Efficient and stable data transmission technology, Bluetooth distance farther, giving users more comfortable homework experience.


Full constell

The full constellation multi-band reception technology fully supports all current and planned GNSS satellite signals, and particularly supports Beidou B1, B2 and B3.


High speed network

4G full Netcom module, downward compatible, suitable for various signal areas, more options are available. The new network architecture supports the current mainstream CORS system.


cloud service

24-hour cloud service support, always solve the user online upgrade, online registration, remote diagnosis and other needs, so that measurement exceeds time and space.


Intelligent Core Platform

The new and efficient intelligent kernel platform has faster computing power and lower power consumption, improving the overall stability of the host. Based on the platform, it can monitor the running status of each part of the host computer in real time, and provides humanized functions such as intelligent power-saving mode, intelligent voice, and intelligent diagnosis.


Universal Data Communication

Fully support the mainstream radio communication protocol and realize interconnection with imported products. The new network program structure is seamlessly compatible with existing CORS systems


K5 Ufo - EN

GNSS characteristics

440 GNSS channels

-GPS L1C/A, L1C, L2C, L2E, L5


-BeiDouB1, B2, B3

-Galileo GIOVE-A, GIOVE-B, E1, E5A, E5B


Initialization: time <10s, reliability >99.99%

Supported data formats:

CMR+, CMRx, RTCM 2.1, RTCM 2.3, RTCM 3.0, RTCM 3.1, RTCM 3.2

Output data formats:

NMEA 0183, PJK plane coordinates, Binary code, Trimble GSOF


Positioning Accuracy

Code differential GNSS positioning

Horizontal: ±0.25m+1ppm

Vertical: ±0.50m+1ppm

SBAS positioning accuracy: typically<5m 3DRMS


Horizontal: ±2.5mm+0.5ppm

Vertical: ±5mm+0.5ppm

Real-time kinematic (RTK)

Horizontal: ±8mm+1ppm

Vertical: ±15mm+1ppm

Network RTK

Horizontal: ±8mm+0.5ppm

Vertical: ±15mm+0.5ppm

RTK initialization time


Physical characteristics


17.5 x 17.5 x 8.3 cm


1.33 kg (2 batteries included)

User interface

Five Indicator lights

Two buttons

Linux System


I/O interface

5PIN LEMO external power port+RS232

7PIN external USB(OTG)+Ethernet

Bluetooth 2.1+EDR standard

Bluetooth 4.0 standard, support android, iosconnection


8GB SSD internal storage

Support external USB storage (up to 32 GB)

Automatic cycle storage

Changeable record interval

Up to 50Hz raw data collection


RTK rover & base

RTK network rover: VRS, FKP, MAC

NTRIP, Direct IP


Environmental characteristics

Operating temperature: -45°to +60°C

Storage temperature: -55°to +85°C

Humidity: 100% condensing

IP67 waterproof, sealed against sand and dust

Drop: 2m pole drop on concrete

Power characteristics

Two Li-Ion batteries, 7.4 V, 3400 mAh

Battery life:>14h (static mode)>10h (internal UHF base mode)>12h (rover mode)

External DC power: 9-25 V

UHF Radio characteristics

Built-in radio

Frequency Range 410-470MHz

Protocol:TrimTalk450s, TrimMark3, SOUTH (KOLIDA)

1W/2W/3W switchable

typically working range 7-8km

“Barrier-Free” Measurement Technology: Repeater/ Router/ CSD mode

Cellular module characteristics


Compatible with 3G GPRS/EDGE




Configure and monitor receiver by web server via Wi-Fi or USB cable


Close range (shorter than 10cm) automatic pair between receiver and controller (need NFC chip in controller)


802.11 b/g standard

Hotspot: allow device to access in

data link: broadcast differential data

Voice Guide

intelligent voice technology provides status indication and operation guide

Chinese, English, Korean, Russian, Portuguese, Spanish, Turkish and user define

Standard system components

K5 UFO Receiver

Li-Ion battery

Charger and adapter

All-direction antenna

Tape measure

30 cm pole extension

7-pin to OTG cable

Engineering Star (Windows)

Engineering Star (Android)

1 year warranty

Optional system components

External Radio (410-470 MHz, 5-35W)

Battery Case SA-6003

Data collectors

-K720 (Windows)

-H3 plus (Android)-T17 (Windows)

-X11 pro (Windows)

Field software

-Field Genius (Windows)-SurvX(Android)

1-2 year warranty extension