Could be executed valent

For measurements in the home use iO, sufficiently accurate. The Taupunkterrechnung from the measured values ​​is very helpful. However, proper for a just a little more robust use of the housing a stronger plastic sheathing missed. In particular, the sensor part seems to be cut off with a slight carelessness. Furthermore, the display of the first developer-generation seems to come. At slightly darker environment the display is difficult to read. For wertigere execution even an appropriate charge would be acceptable !!!