Process and its advantages

Microflame soldering unit Lötstar
Typ: Lötstar

MIG-O-MAT micro soldering and welding units have their own gas production. Electrolysis of distilled water produces a hydrogen/oxygen mixture which is then used to feed the micro flame. The mixing ratio is the same as in water (H2O), 2 hydrogen : 1 oxygen. The burning of the gas leaves no residues, just volatile steam.

Economical of operating material

The gas is produced by the electrochemical way of electrolysis. The electrolyte turns the distilled water conductive. The electrolyte is not used up by the electrolysis and does not have to be renewed for a long time. One only has to maintain the level of the electrolyte by adding distilled water to keep the unit functional

Application area

The temperature and the energy of the micro flame is adaptable to a broad applications area. With up to 3000º C the micro flame melts almost every metal, glass, or other material. Welding, brazing, soldering and annealing are some of the most important applications.


A process using bottled gas usually includes the problem of how to exactly adjust the flame. Especially with copper materials a steady flame is essential. The oxy-hydrogen flame always has an absolutely constant composition. No other method comes close to the extremely low running costs. At the same time these units are almost always operational and consume very few distilled water. The Lötstar 120 for instance would need about 0.6 liters of distilled water if used with constantly burning flame and maximum gas production. Even soldering robots do not burn for such a long period of time. And with the gas usually only being produced if necessary, the actual consumption is even lower. The distilled water can be purchased at every filling station.

The torch and its micro nozzles weighing only 100 grams and the gas tube being highly flexible both strongly support precise manual work without getting tired.