The  LT400HS  is  a  rugged  120-channel  GPS+GLONASS  handheld receiver  designed  to  achieve  sub-meter  to  RTK  centimeter  accuracy in adverse mapping conditions. The LT400HS is the most cost-effective and  powerful  GNSS  Solution  for  survey,  construction  and  GIS professionals.  

The LT400HS is the perfect choice for companies which have not yet invested in GNSS technology due to cost or/and occasional equipment use (earth moving and landscape contractors, real estate developers, construction SMEs, agriculture irrigation, utilities mapping..).

Bundled with Carlson’s SurvCE® software, the LT400HS is the perfect cost-effective GNSS RTK Survey Solution for survey and construction professionals.





·         Specifications

·         Resource

GNSS Characteristics

120 channels

GPS: L1,L2, L2C





Update Rate

1 Hz

Time to first Fix(1)

<45 s (typical)

External antenna support



Performance specifications(1)


< 2 m RMS

SBAS real-time accuracy

< 1 m RMS

Network RTK


- Horizontal (external antenna)

2 cm + 1 ppm

- Horizontal (internal antenna):

< 10 cm + 2 ppm

- Initialization time:

< 30 s

- Initialization reliability:

 > 99.9%


System configuration

Windows Mobile 6.1 operating system


3.7” VGA transflective sunlight readable screen.



480×640 pixel

Processor speed

806 MHz


Internal 256 MB RAM and 256 MB flash storage


External TF card slot, 4 GB as standard (up to 16 GB)

5.0 mega pixel autofocus camera




Internal GSM/GPRS modem 850/900/1800/1900 Mhz


Bluetooth class 2, version 2.1+ EDR protocol


1x USB port


Built-in microphone


Built-in Wi-Fi

802.11 b/g

SIM socket


Data I/O protocol

RTCM 3.x and NMEA 0183



Size (LxWxH)

210 x 95 x 45 mm (8.3 x 3.7 x 1.8 in)


 575 g with battery (20.3 oz)

Operating temperature

 -30 °C to +65 °C (-22°F to 149°F)

Waterproof and dust proof



 survives a 1.2 meter drop on to concrete



Li-ion battery capacity

 6800 mAh @ 3.7V

Battery life

 typical 8 hours with GNSS on

Charging power

 5 VDC via USB charger


Package content

LT400HS Handheld GNSS Data Collector


Li-Ion battery


4 GB memory card


USB Data cable


Power Adapter





Accessories (Optional)

Precision Kit

External geodetic GNSS antenna


2m pole


Pole bracket,


GPS antenna cable


 Transport hard case


Software (Optional)

Carlson’s SurvCE version 3


DigiTerra Explorer 7 Professional Edition



(1) Accuracy  and  reliability  specifications  may  be  affected  by  multi  path, satellite  geometry  and  atmospheric  conditions.  Performances  assume minimum of  5 satellites, follow up of recommended general GPS practices. Specifications are subject to change without notice.