Our R&D Glass Shop is a one-stop, full-service glass tube shop. The R&D glass shop is suitable for a wide range of applications and products. Just send us your specifications, and/or autoCAD drawings, and we will build it. (See pictures of operator in action at our R&D Glass Shop, below ). Or, just choose from our state-of-the-art robot-built electrodes. (Confidential, no picture available). Our robot-line can produce about 90,000 electrodes per week. All electrodes, cells, probes and electrolytes are proudly designed, and manufactured in the U.S.A.

Above picture shows robot-made ORP electrodes tips.

 

 

Why many catalogs & companies are utilizing our electrodes

 

1. Fast return

 

2. In-house fully equipped Glass Shop includes:

  • Induction heaters

  • Glass Lathes

  • CNC Glass Lathe

  • Auto-Furnace

  • Kilns

  • Platinum Crucibles

  • Special sensing glass formulary. (Proprietary) See basic glass types below. 

  • Many glass sensor ranges to choose from:

    • 0-14 pH very linear

    • Low sodium error

    • Electrode slope @25C is 98% and up

3. Made in USA

 

 

Basics glass types

 

Standard Glass

  • pH Range: 0 to 14 pH

  • Impedance Range @ 25°C: 120 to 672 M-Ohms

  • Temperature Range: -9 to 108°C

  • Response Time: 2.7 second

  • Low Ionic strength solution response Time: < 30 seconds

  • Stability: ± 0.00108V (in 24 hours)

  • Shape: Round hemispherical or dome like shape

Flat Glass

  • pH Range: 0 to 13.13 pH

  • Impedance Range @ 25°C: 72 to 318 M-Ohms

  • Temperature Range: -9 to 108°C

  • Response Time: 4.2 second

  • Low Ionic strength solution response Time: < 30 second

  • Stability: ± 0.00111V (in 24 hours)

  • Shape: Flat or convex-like shape

Hard Glass

  • pH Range: 0 to 12.4 pH

  • Impedance Range @ 25°C: 200 to 612 M-Ohms

  • Temperature Range: -9 to 139°C

  • Response Time: 7 second

  • Low Ionic strength solution response Time: < 60 seconds

  • Stability: ± 0.00114V (in 24 hours)

  • Shape: Spear and dome-like shape

Low Na Error Glass

  • pH Range: 0 to 13.13 pH

  • Impedance Range @ 25°C: 45 to 369 M-Ohms

  • Temperature Range: -9 to 137°C

  • Response Time: 1 second

  • Low Ionic strength solution response Time: < 30 seconds

  • Stability: ± 0.00102V (in 24 hours)

  • Shape: Round hemispherical-like bulb

Low Impedance Glass

  • pH Range: 0 to 13.25 pH

  • Impedance Range @ 25°C: 45 to 360 M-Ohms

  • Temperature Range: -9 to 137°C

  • Response Time: 1 second

  • Low Ionic strength solution response Time: < 30 seconds

  • Stability: ± 0.00135V (in 24 hours)

  • Shape: Round hemispherical-like bulb

The temperature range is based on the abilities of the glass stem, not the overall combination electrode. Response time is the time to 96%. All response times are calculated on the pH stem level. The response time varies due to the various electrolytes used in our electrodes. All above measurements are statistical averages of 1000 electrodes, which are chosen randomly by our quality assurance department.

 

A spherical-shaped bulb will provide 96% response in less than one second. It has low impedance and fast response but is relatively fragile. pH electrodes with spherical shaped surfaces are designed so that the bulb is recessed inside the electrode body. Such designs protect the glass bulb against breakage.

 

A hemispherical shaped bulb is a mechanically stronger shape than the spherical shape.  As a result, it has a higher impedance and slightly slower response. These shapes are often used in a fully exposed manner.

 

A flat measuring surface is a very durable shape. It makes good sample contact (ideal for petri-dishes etc.), is easily cleaned, is very strong mechanically, but relatively high impedance and semi-slow response, 96% in less than 4.5 seconds.

 

A Hard glass measuring surface is usually manufactured as a spear or dome shape. It makes good penetration into sample contact, very strong mechanically, and one of the highest impedance and slowest response, 96% in less than 7 seconds. 

 

 

Link to some of our general electrodes containing glass.

 

      

 

 

Finally our R&D and robot Glass Shops can handle any glass tube from 1mm to 254mm So just drop us a line at glass-shop@eidusa.com and let us OEM your next electrodes, cells, sensors or probes.

 

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