Auto LLT2

The AUTO LLT 2 is a borehole lateral load tester that functions to determine the deformation characteristics of the ground from the relation between pressure inside its sonde and the inflated amount of its rubber tube.

A conventional LLT requires gas pressure injection into its tank and the tank makes it difficult to carry the system because the weight of the tank is about 40 kg, while the tank of the AUTO LLT 2 weighs just about 10 kg. In the case of the AUTO LLT 2, the amount of water absorption from its tank and the amount of water supply to its sonde are always the same because of its double acting pump, contributing to its stable and accurate measurements.

NOTE : This product is manufactured in one of OYO Group companies, OYO Geo-monitoring Service Corporation, in Japan.

Auto LLT2


  • Full automatic borehole lateral load tester
  • Pressure control and data storage at each step are automatically conducted from start to finish
  • No high-pressure gas is required
  • Lightweight because of its water tank system


Tank part

Tank (I.D.) φ113mm x 1100 mm
Weight 8kg

φ80 sonde

Diameter φ86mm
Dimension Outer diameter; 80mm, Length; 900mm
Dimension (loading part) Outer diameter; 80mm, Length; 600mm
Weight 12kg

Pressure unit

Maximum load capacity 2.5MPa
Power AC 100V
Weight 31kg

Control unit

Pressure gauge Pump; 10MPa, Sonde; 2.5MPa
Water level sensor 0 - 650mm
Power DC 12V
Operation method Touch panel
Storage SD card (CSV file format)
Weight 7kg


Inquiry for OYO product, please contact your distributor in your country from below.