is the largest European independent testing and certification organisation, a major calibration laboratory, an inspection body and a training centre.

TLO a.s. is a notified body and has several accreditations and certificates to perform various tasks. It tests and assesses machines and products, calibrates measuring instruments, services and repairs TESA instruments and equipments from other manufacturers. The training centre offers various training programmes. The inspection body inspects new and operating lifting equipments and lifts, and assesses machinery, plants, equipments and tools from the point of view of safety requirements. The company was founded in 2000.


Testing laboratory

The testing laboratory specializes in tests of mine supports and hydraulics, performs tests of machines, hydraulics and defectoscopy of materials and ropes, including tests of mechanical properties of materials.

More information about testing

Calibration laboratory

The calibration laboratory performs calibration of length and angle gauges to the extent specified in the Appendix to the certificate of accreditation. We also perform accurate control measurements on Nikon and Werth 3D machines.

More about calibration

Product certification

The certification body for products is accredited for machinery and equipment for mining, tunnelling, transporting, earthwork, underground work, hydraulic and pneumatic mechanisms, plastic products, ropes…

More about product certification

Repairs and service

The only TESA certified service centre for the Czech Republic, Slovakia and Poland. We provide full service of instruments incl. adjustments, settings, and correction settings. We produce dedicated special measuring devices.

More about service


The inspection body performs:

  • compliance assessment and inspection of lifts and their safety components pursuant to Act No. 90/2016 and Government Regulation No. 122/2016 Coll., and inspection of the lifting equipment used, and inspection of lifts and structures used as part of the lifting equipment.
  • assessment of machines, technical equipment, instruments and tools in terms of requirements for safe operation, risk analysis of machinery and pressure equipment, processing of operating instructions…

More about inspection

Do not hesitate to contact us

Do you have any questions? Would you like to work with us or can we help you? Are you interested in our field and would like to work with us? Feel free to contact us by phone or e-mail.


Naši partneři


Swiss gauge manufacturer


Seller of TESA gauges

TEST S.p.z o.o.

Notified Body in the field of mining machinery

ATG s.r.o.

Training and NDT tests

TSU Piešťany

EMC and machine approval

J.S. Hamilton

Notified Body (Poland)