The Belt String Encoder is based on a proven instrument used for exact distance measurements in rough terrain. It features a belt clip for easy carrying and an external mechanical counter reset. This counter allows for reliable calibration without the need for wheels. The housing is moulded from a strong Polycarbonate-plastic. The thread spool lasts for around 2,5 km or 1.55 miles and is easy to replace.

A survey wheel encoder specifically developed for HBD-350. The construction is spring loaded for continuous distant measurement.

A flexible telescopic construction allowing easy deployment of TUBEWAVE antennas. The sturdy construction is made with a combination of aluminum details and fibre glass pipes. It is is easy to assemble and disassemle. It can be transported with ease when disassembled.