A word of caution
If by any chance someone attempts to make a digital set up using the meter above let me caution you. This is a very sensitive unit. Two things to watch out for.
1- LCD display unit. This uses the same type of display system that Kenwood used in the TM-V7. There is a small ribbon cable that attachés from the pc board to the LCD. It is not soldered on. It has a fine glue that attachés both ends. If you disturb the ribbon cable you might as well junk it to the side and grab another unit.
2- The sensor in this type of meter uses 7 connections instead of 4 like the electronic spirit levels. The sensor has epoxy holding it in place and the epoxy covers the whole side where the leads attach. Take note of where leads a,b,c,d,e,f,GRD go. You can see them in the epoxy. This is a soft epoxy so no heat is required. You will have to use an hobbie knife to trim it away from the unit. Be cafeful not to cut the traces on the pc board.
3-Use low wattage irons for work. And use small gauge wire to pc board and to sensor. The traces are easy to lift.
Also attached are two levels that are pretty cheap. Around the 100 dollar mark. You can find them used.