Product Name

Gauge Glass,Reflex Gauge Glass, Sight Glass, Level Gauge Glass 

Material

Borosilicate glass

Color

Transparent, Red, Green

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±0.1x10-6K-1

Poisson's ratio

0.18

Coefficient of thermal expansion

(0-300) 4±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

Size

Width: 25-35 mm. Length: 70-420 mm. Thickness: 15-25 mm.