Suitable for government verification.
Enclosed scale, Ø 8 to 9 mm, with milk-glass scale and Richter-top finish, capillary lens front.
Measuring range - 200 to + 30 °C:
blue reflecting, pentane compound filled
|Measuring range - 100 to + 30 °C:||capillary colourless, red toluene filled|
|Measuring range - 50 to + 50 °C:||capillary colourless, red toluene filled|