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Transparent type glass DIN 7081

Borosilicate Transparent level gauge glasses MAXOS

Description:

Transparent type glass DIN 7081 made under trademark MAXOS. Transparent glasses DIN 7081 used for liquid level indicators. Reflex glass for level indicator is a rectangular glass plate with rounded edges. One of its viewing surfaces - is smooth and the other surface has prismatic risks. Due to the risks, there is a complete internal reflection of light, and the liquid level is clearly visible.

MAXOS glasses made of SUPRAX® 8488 borosilicate glass. Maximum resistance to temperature changes is attained by means of low thermal expansion and additional thermal pre-stressing of high uniformity.

The brand MAXOS owned by a German company Auer Lighting GbmH. Previously, the brand MAXOS belonged to a group SHOTT*.

*Friedrich Otto Schott (1851-1935) was a German chemist, glass technologist, and the inventor of borosilicate glass. In 1884, in association with Dr Ernst Abbe and Carl Zeiss, Otto founded Glastechnische Laboratorium Schott & Genossen (Schott & Associates Glass Technology Laboratory) in Jena.

To buy borosilicate transparent glass DIN 7081 in Moscow in the Company Dominic in two steps:

Сhoose the delivery method (courier delivery or transport company);
Send us a request (what kind of products, quantity, other details are required) to the address — info@techsteklo.ru or let us know your need by phone: +7 (495) 231-36-71;

The main dimensions and prices of borosilicate transparent glass DIN 7081 are shown in the table:

Number of glass	Length, mm	Width, mm	Thickness, mm	Mass, kg	Price, Eur
No 0	95	34	17	0,11	-
No 0	95	30	17	0,10	-
No 1	115	34	17	0,132	-
No 2	140	34	17	0,162	-
No 3	160	34	17	0,195	-
No 3	160	30	17	0,183	-
No 4	190	34	17	0,228	-
No 4	190	30	17	0,202	-
No 5	220	34	17	0,228	-
No 5	220	30	17	0,264	-
No 6	250	34	17	0,301	-
No 6	250	30	17	0,265	-
No 7	280	34	17	0,338	-
No 7	280	30	17	0,303	-
No 8	320	34	17	0,387	-
No 8	320	30	17	0,356	-
No 9	340	34	17	0,410	-
No 9	340	30	17	0,536	-
No 10	370	34	17	-	-
No 10	370	30	17	-	-
No 11	400	34	17	-	-

When you insert the glass in the gauges you need to apply strips. Our Company offers a special strip, reinforced with smooth steel tape.

Operating conditions of Borosilicate Glasses MAXOS DIN 7081:

Maximum permissible temperature: 300^оС ;
Maximum permissible temperature with mica: 320 ^оС ;
Thermal shock resistance Δ T: 265 K;
Bending strength: ≥ 160 N/mm² (23 000 psi);
Surface compressive stress: ≥ 100–140 N/mm2 (14.500–20.000 psi);

Characteristics of Borosilicate Glass SUPRAX 8488:

Coefficient of expansion a _(20/300^o_C): 4,1*10^-6/K;
Transformation temperature: 545°C;
Density: 2,31 g/cm³;
Modulus of elasticity: 67000 N/mm²;
Poisson`s ratio m: 0,20;
Thermal conductivity l at 90°C: 1,20 W m^-1K^-1;
Refractive index nd (l=587,6 nm): 1,482;
Photoelastic parameter K: 3,2.10^-6;
Abbe number v_d: 64.5;
Internal transmittance at 550 nm: 98.9% at 10mm thickness;
Permanent operating temperature: 400°C; 300°C for thermally toughened glass
Thermally toughened glass should not be used permanently above operating
temperature of 300°C (Loss of toughening);
Maximum short-term application temperature: 450°C for 10 min;
Thermal shock resistance DT: 130°C;
265°C for thermally toughened glass;
Glass temperature at viscosity dPas (Poise):
Annealing point: 10¹³dPas 560°C,
Strain point: 10¹⁴.5 dPas 530°C,
Littleton point: 10^7.6dPas 800°C,
Working point : 10^4.0dPas 1210°C;
Hydrolytic resistance to DIN ISO: 719 HGB 1;
Acid resistance to DIN ISO 1776:100 μg Na2O each 100 cm²;
Alkali resistance to DIN ISO 695: class A2;

Chemical composition of Borosilicate Glass SUPRAX 8488 (DIN 7081):

SiO₂	B₂O₃	Na₂O	Аl₂O₃	BO	ZrO₂
76,0	12,0	6,0	4,0	1,0	1,0

The addition of a composition of borosilicate glass with 1% ZrO₂, and decrease in the content of B₂O₃ increases the resistance to water, acids, caustic alkalis.