Thermometers with ground joint, DIN 12784 and similar DIN standards, standard ground joint 14,5/23, enclosed scale type, capillary unbacked or luminous blue, filled with Hg or red/blue/green filling, upper section 11 mm dia., lower section 7 to 8 mm dia., Richter top, calibratable.
1) Non-DIN size.
Installed length = Lower section + Ground joint