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Size | ||||||||
No | L | B | S | Roman No | ||||
0 | 95 | 30/34 | 17/22 | - | ||||
1 | 115 | 30/34 | 17/22 | I | ||||
2 | 140 | 30/34 | 17/22 | II | ||||
3 | 165 | 30/34 | 17/22 | III | ||||
4 | 190 | 30/34 | 17/22 | IV | ||||
5 | 220 | 30/34 | 17/22 | V | ||||
6 | 250 | 30/34 | 17/22 | VI | ||||
7 | 280 | 30/34 | 17/22 | VII | ||||
8 | 320 | 30/34 | 17/22 | VIII | ||||
9 | 340 | 30/34 | 17/22 | IX | ||||
10 | 370 | 30/34 | 17/22 | X | ||||
11 | 400 | 30/34 | 17/22 | XI | ||||
Note | B=30 always named A type. B=34 always named B type, S=22 always named H type. | |||||||
Product Name | Level gauge glass |
Material | borosilicate glass |
Color | Transparent |
Density | 2.62-2.67g/cm3 |
Transmissivity | 91.8%(8mm), 91.9%(1mm) |
Hardness | >7 |
Tensile strength | 4.8x107pa(N/M2) |
Compressive strength | (0-300) 3.3±0.1×10-6K-1 |
Poisson's ratio | 0.18 |
Coefficient of thermal expansion | (0-300) 3.3±0.1×10-6K-1 |
Thermal conductivity | 1.2W·m-1·k-1 |
Softening point | 820±10°C |
Annealing point | 560°C |
Strain point | 516±10°C |
Electrical resistivity | >1018 Ωm |
Dielectric constant | 4.6 1 MHz, 25 |







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