Cylinder Head Temperature, gauge/thermometer

Hello, I need to measure the cylinder temperature on my vespa T5 and would like to know more info about the Koso temperature gauge (Art.Nr. KOBA003030). It says on the description that the range is only 0-150º, but it's digital, doesn't it go to 200-250º? This one would be perfect for my vespa because it has light and an adapter for the spark plug. All the other temperature gauges you have for sale have the same range problem, can't apply them on air cooled engines.

Best Regards

i used a cht gauge sold for aircraft, picked it up in melbourne with sparkplug probe for $90.00

just google "cylinder head  temperature gauge"  or  try  westech