Reed Switch Glass Tubing
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Technical Details of Reed Switch Glass

With an exceptionally accurate cutting process, optional contamination-free sealing, and quick sample turnaround, SCHOTT Reed Switch Glass is a must-have for switch protection.

Accuracy and consistency are our standard

Cutting-edge precision

The high-precision cutting tools for our reed switch glass products were developed by an in-house team to achieve the highest possible levels of accuracy and quality.

Contamination-free sealing

Reed switch glass is green because of its high iron content, which delivers considerable infrared absorption rates. This means customers can seal the glass in a totally contamination-free process by using light as opposed to flames.

Perfect composition

Reed switch tubing achieves superior accuracy in terms of glass composition and dimensional tolerances.

Quick, simple sampling

SCHOTT offers highly optimized and controlled reed glass manufacturing methods, enabling rapid and flexible sampling for custom-made components.
Technology
Specification
Dimensions

Technology

The fabrication of glass tubes is one of SCHOTT's key competencies. All high-precision cutting equipment has been developed in-house. Key developments in recent years include a focus on reducing dimensional tolerances as well as miniaturization. Washing and packing in modern clean rooms enables excellent cleanliness and direct usability in our customers’ processes.

Specification

The following table details the properties of SCHOTT's 8516 Reed Glass: 

Glass Number 8516
Sealing alloy NiFe 52
Evaporation tendency 1) 0
CTE                                                                      10-6/K 8.9
Transformation temperature                                  °C  440
Softening point (107.6dPas)                                   °C 650
Working point (104dpas)                                        °C  990 
Density                                                                  g/cm3 2.56
Modulus of elasticity                                              GPa   72
Refractive index  1.516 
tk 100 (DIN 52326)                                                 °C 250 
Electrical volume resistivity (in cm) log ρ at 250 °C  8.1 
Electrical volume resistivity (in cm) log ρ at 350 °C 
 6.4 
Dielectric constant                                 (25 °C, 1 MHz) 6.5
Loss angle tanδ                                     (25 °C, 1 MHz) 25x10-4
Classes of chemical stability   
Transmission of 0.5 mm glass at 1.1 µm  16
Water resistance (DIN 12111) class 3 
Acid resistance (DIN 12116) class  1
Acid resistance (DIN 52322) class  2 

Dimensions

Overview of available dimensions for IR tubes 8516*: 

  • Length from 7-50 mm**
Outer Diameter Inner Diameter Wall Thickness
1.30 +/- 0.03 mm   0.225 +/- 0.025
1.45 +/- 0.05 mm   0.225 +/- 0.025
1.70 +/- 0.03 mm   0.25 +/- 0.03 
1.75 +/- 0.03 mm   0.25 +/- 0.03  
2.06 +/- 0.04 mm   0.23 +/- 0.04  
2.10 +/- 0.05 mm   0.275 +/- 0.025 
2.13 +/- 0.05 mm   0.33 +/- 0.025  
2.15 +/- 0.04 mm   0.28 +/- 0.04 
2.21 +/- 0.04 mm   0.355 +/- 0.025 
2.40 +/- 0.05 mm 1.71 +/- 0.05 mm 
  
2.40 +/- 0.04 mm   0.38 +/- 0.025  
2.40 +/- 0.05 mm   0.32 +/- 0.05  
2.45 +/- 0.05 mm   0.35 +/- 0.05 
2.50 +/- 0.025 mm 2.0 +/- 0.025 mm
  
2.55 +/- 0.05 mm   0.36 +/- 0.03  
3.00 +/- 0.05 mm  2.20 +/- 0.05 mm   
3.50 +/- 0.05 mm    0.45 +/- 0.05  
3.85 +/- 0.05 mm    0.33 +/- 0.03  
4.63 +/- 0.12 mm  3.8 +/- 0.1 mm
  
4.90 +/- 0.07 mm  3.7 +/- 0.07 mm   
4.90 +/- 0.07 mm
   0.65 +/- 0.05   
4.90 +/- 0.10 mm    0.55 +/- 0.05   
5.05 +/- 0.07 mm
 3.6 +/- 0.07 mm    
5.10 +/- 0.10 mm   0.65 +/- 0.05 
5.20 +/- 0.10 mm
   0.45 +/- 0.05 
6.50 +/- 0.10 mm    0.56 +/- 0.05  
8.10 +/- 0.13 mm  6.5 +/- 0.13 mm   

 

*Subject to change. Other sizes available upon request. 
**Depending on the length-diameter ratio.

 

Want to know more? Let's talk

Whether you need more information, samples, a quote, or advice for a project, I would be delighted to talk to you.

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Antonio Trizzino, Sales Manager Europe
Antonio Trizzino

Sales Manager Europe