Long form level gauge glasses Available size Special design for REFLEX and TRANSPARENT on request: e.g. 21 mm thickness.

Size Length
mm
Dimensions Width 
mm
Thickness 
mm
max. flatness tolerance 
mm
1 115 30 17.5 0.05
2 140 30 17.5 0.05
3 165 30 17.5 0.05
4 190 30 17.5 0.05
5 220 30 17.5 0.08
6 250 30 17.5 0.08
7 280 30 17.5 0.13
8 320 30 17.5 0.13
9 340 30 17.5 0.13
Tolerances above up to 250 ± 0.8 +0.5 +0 0.13
  250 ± 1.0 -0.8 -0.1 0.13


Flatness (max.)

Size 1–3 ≤ 0.05 mm ≤ 0.002 inches
Size 4–5 ≤ 0.08 mm ≤ 0.003 inches
Size 6–9 ≤ 0.13 mm ≤ 0.005 inches
High pressure ≤ 0.05 mm ≤ 0.002 inches
(only transparent)
Temperature
Thermal shock resistance Δ T 265 K
Max. permissible temperature 300 °C 572 °F
Protected with mica 320 °C 608

Calculation of the glass thickness
(acc. to DIN 7080)