Thermo Fisher Scientific EC620130 User Manual

Instruction Manual

EC620130 Series Combination pH Electrodes

Version 1.1ML 68X068045 Rev 3 Jan 07

Blk 55, Ayer Rajah

Crescent, #04-16/24 Singapore 139949

+65 6778 6876

+65 67730836 fax

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PRODUCT SPECIFICATIONS

EC620130 Series Combination pH Electrodes

Catalog No. Description Length/Diameter (mm) Connector

EC- 620-130

EC- 620-131

EC- 620-132

EC- 620-133

Glass body, refillable 160/12 BNC EC-636-430

Glass body, gel-filled 130/12 BNC N/A

Plastic body, gel-filled 120/12 BNC N/A

Glass body, gel-filled,

spear tip

70 mm overall length,

25/6 mm insertion

BNC N/A

Refilling Solution

PERFORMANCE SPECIFICATIONS

Specification / Model EC-620-130 EC-620-131 EC-620-132 EC-620-133

Body Material Glass Plastic Glass

pH Range 0 to 14 pH 2 to 14 pH

Temperature range 0 to 80 °C 0 to 60 °C 0 to 50 °C

Slope (out of Box) 59 +/- 3 mV/pH at 25°C (95 to 105% slope)

Zero point pH 7

Offset (asymmetry potential) 0 mV +/- 25 mV

Reference Junction Double Junction

Junction Type Open pore Double Pore

Membrane Shape Cylindrical Spear Tip

Improved junction and reference design for precise, reliable, FAST readings

Better junction. EC620130 series electrodes use a single-pore capillary reference junction—about 200 times larger than typical ceramic junctions—that makes the electrodes almost impossible to clog, even in difficult samples. The unique junction design provides increased electrolyte flow, resulting in greater contact between sample and reference, and ensuring fast, stable readings.

Better reference design. Along with the capillary junction, our electrodes feature double junction design for enhanced performance. A diffusion barrier separates the silver chloride reservoir from the reference electrolyte, permitting use of silver-free electrolytes and preventing silver chloride loss from temperature induced variations. End result: an extremely stable reference potential, providing long electrode life.

EC-620-130 Unique fluid-gel electrolyte and innovative junction design produces a high flowrate and improved contact between reference electrolyte and sample. The result is faster response time and very accurate readings. The double-liquid-junction system further extends the diffusion barrier, greatly increasing electrode life in aggressive samples. It also performs well in liquids with low ion concentration and in partly aqueous samples.

EC-620-131, -132, -133 Solid polymer-gel electrolyte offers the advantages of the EC620130 series system in a maintenance-free version. Polymer gel provides a more stable matrix than other gelled electrode reference systems, providing reliable results in very dirty, ion-weak or protein samples—even

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