Tris compatible pH Electrodes
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IOLINE TRIS COMPATIBLE pH ELECTRODES
Iodine glass pH electrodes for the most demanding applications.
Tris compatible pH electrodes FEATURES:
  • Unique iodine/iodide reference system
  • Tris buffer compatible
  • Exchangeable bridge electrolyte
  • Integrated refill port
  • Excellent for a wide range of applications
To Order Call 1-800-876-1172
Tris compatible pH electrodes Options & Prices
On this page:

Tris compatible pH electrodes Product Description
Tris compatible pH electrodes Specifications
Tris compatible pH electrodes Options & Prices

Downloads (PDF):

Tris compatible pH electrodes Brochure
Tris compatible pH electrodes Manual*

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Additional Information:

Tris compatible pH electrodes measurement values explained
Tris compatible pH electrodes calibration explained
Tris compatible pH electrodes calibration methods
Tris compatible pH electrode maintenance explained
Tris compatible pH electrode reference systems and diaphragms explained
Tris compatible pH electrode glass types explained
Product Support

Tris compatible pH electrodes Product Description
The IoLine Tris compatible pH electrodes use a patented three chamber system with an iodine reservoir in the iodine/iodide reference electrode.  The reference system is a very important part of the Tris compatible pH electrode.  The standard hydrogen electrode has proven too difficult in practical use to gain more than a mere theoretical importance.  The Ag/AgCl reference system, which is the most common reference system, can cause measuring instabilities originating from potential variations with changing temperature or reactions between silver ions and the measuring solution in the area of the diaphragm.  IoLine Tris compatible pH electrodes, in contrast, have the advantage of a much lower temperature sensitivity and a metal ion free reference system.  The Tris compatible pH electrode reference system is based on the following reaction:

I2 + I- + 2 e- <-> 3 I-

The ORP is thereby described by the Nernstian equation:

EH = Eo + RT/zF * ln ([I3-] / [I-]3)

Whereby
Eo = 0.536 V, R = 8.314472 I/(K*mol), T in K, z = 2 und F = 96485.34 C/mol.

The stability of the reference system potential even at changing temperatures is the key to the IoLine Tris compatible pH electrodes' superior response speed and measurement stability.  Additionally, these Tris compatible pH electrodes have a higher accuracy when compared to conventional Ag/AgCl pH electrodes.

A further advantage of the Tris compatible pH electrodes is the fact that the component determining the potential, i.e. the Iodine, is continuously being resupplied from the patented three chamber reservoir system.  The first Tris compatible pH electrode chamber contains a supply which is used to refresh the reference electrolyte and the reference system of the second chamber with iodine in order to maintain the necessary I3-/I- concentration to create a stable reference potential.  The electrolyte link between the second and the third chamber, which contains the exchangeable bridge electrolyte, is provided by the Tris compatible pH electrode's internal diaphragm.  The bridge electrolyte also provides the contact with the sample via the Tris compatible pH electrode's diaphragm.

The Tris compatible pH electrode's interior diaphragm is designed to allow only a minimal diffusion of I3-/I- (Tri-iodide/Iodide) into the bridge electrolyte.  Hence, the iodine consumption in the Tris compatible pH electrode's reference electrolyte is very low and needs only very little re-supplying from the first chamber.  The supply is practically unlimited and guarantees a high stability of the potential and a long lifespan of the IoLine Tris compatible pH electrodes.  However the Tris compatible pH electrodes are built with an integrated refill port in the electrode's head that enables easy refilling of the reference system.

Platinum diaphragm for fast response and high stability
Many of the Tris compatible pH electrodes have a platinum diaphragm, developed by SI Analytics to increase the stability and response time of the iodine/iodide reference system.  The platinum diaphragm allows for remarkably constant and reproducible measuring characteristics when using the IoLine Tris compatible pH electrodes.  It contains twisted platinum wires being fused into the glass shaft of the Tris compatible pH electrode.  The defined spaces of the platinum wires guarantee a continuous and steady electrolyte flow and high stability of the Tris compatible pH electrode's reference system in all media and at changing temperatures.

Applications
The IoLine Tris compatible pH electrodes have a reference system that is 100% free of metal ions.  This means that the Tris compatible pH electrodes will not contaminate the measuring media with metal ions allowing them to be used with Tris buffers.  The Tris compatible pH electrodes are particularly good in applications where rapid temperature changes may occur.  For precision pH measurements in research and quality control i.e. chemistry, pharmacy, biotechnology, or food industry the Tris compatible pH electrodes are an excellent choice.
Tris compatible pH electrodes Specifications
pH Range: 0 to 14
Temperature Range: 23 to +212°F (-5 to +100°C)
Shaft: Glass
Zero Point: pH = 7.00 ±0.25
Reference System: iodine/iodide
Type of Membrane Glass: A
Tris compatible pH electrodes Options & Prices
Prices listed are for United States and Canada only.  Call or e-mail us for pricing in other countries.
Terms and Conditions

NOTE: For Tris compatible pH electrodes with integrated temperature sensors click HERE
IOLINE TRIS COMPATIBLE pH ELECTRODE WITH BNC CONNECTOR
IoLine IL-pH-A120MF-BNC Tris compatible pH electrode (PN# 285114160)
Electrode with 3.28 ft (1 m) fixed cable with BNC plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A120-BNC Tris compatible pH electrode (PN# 285114170)
Electrode with 3.28 ft (1 m) fixed cable with BNC plug, ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170MF-BNC Tris compatible pH electrode (PN# 285114340)
Electrode with 3.28 ft (1 m) fixed cable with BNC plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170-BNC Tris compatible pH electrode (PN# 285114350)
Electrode with 3.28 ft (1 m) fixed cable with BNC plug, ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-MICRO-pH-A-BNC Tris compatible pH electrode (PN# 285114290)
Micro electrode with 3.28 ft (1 m) fixed cable with BNC plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, cylindrical membrane, 400 MΩ membrane resistance, A-glass, length 1.6/5.1 in (40/130 mm), 0.47/0.2 inch Ø (12/5 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-SP-pH-A-BNC Tris compatible pH electrode (PN# 285114330)
Spear electrode with 3.28 ft (1 m) fixed cable with BNC plug, 3 x ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, spear membrane, 400 MΩ membrane resistance, A-glass, length 2/2.8 in (50/70 mm), 0.47/0.31 inch Ø (12/8 mm Ø), no temperature sensor integrated.
Pricing
IOLINE TRIS COMPATIBLE pH ELECTRODE WITH DIN CONNECTOR
IoLine IL-pH-A120MF-DIN Tris compatible pH electrode (PN# 285113810)
Electrode with 3.28 ft (1 m) fixed cable with DIN plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A120-DIN Tris compatible pH electrode (PN# 285113820)
Electrode with 3.28 ft (1 m) fixed cable with DIN plug, ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170MF-DIN Tris compatible pH electrode (PN# 285113830)
Electrode with 3.28 ft (1 m) fixed cable with DIN plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170-DIN Tris compatible pH electrode (PN# 285113840)
Electrode with 3.28 ft (1 m) fixed cable with DIN plug, ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-MICRO-pH-A-DIN Tris compatible pH electrode (PN# 285113930)
Micro electrode with 3.28 ft (1 m) fixed cable with DIN plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, cylindrical membrane, 400 MΩ membrane resistance, A-glass, length 1.6/5.1 in (40/130 mm), 0.47/0.2 inch Ø (12/5 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-SP-pH-A-DIN Tris compatible pH electrode (PN# 285113940)
Spear electrode with 3.28 ft (1 m) fixed cable with DIN plug, 3 x ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, spear membrane, 400 MΩ membrane resistance, A-glass, length 2/2.8 in (50/70 mm), 0.47/0.31 inch Ø (12/8 mm Ø), no temperature sensor integrated.
Pricing
IOLINE TRIS COMPATIBLE pH ELECTRODE WITH S7 SCREW PLUG CONNECTOR
IoLine IL-pH-A120MF Tris compatible pH electrode (PN# 285114140)
Electrode with S7 screw plug head, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A120 Tris compatible pH electrode (PN# 285114150)
Electrode with S7 screw plug head, ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170MF Tris compatible pH electrode (PN# 285114180)
Electrode with S7 screw plug head, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170 Tris compatible pH electrode (PN# 285114190)
Electrode with S7 screw plug head, ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-MICRO-pH-A Tris compatible pH electrode (PN# 285114280)
Micro electrode with S7 screw plug head, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, cylindrical membrane, 400 MΩ membrane resistance, A-glass, length 1.6/5.1 in (40/130 mm), 0.47/0.2 inch Ø (12/5 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-SP-pH-A Tris compatible pH electrode (PN# 285114320)
Spear electrode with S7 screw plug head, 3 x ceramic diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, spear membrane, 200 MΩ membrane resistance, A-glass, length 2/2.8 in (50/70 mm), 0.47/0.31 inch Ø (12/8 mm Ø), no temperature sensor integrated.
Pricing
IOLINE TRIS COMPATIBLE pH ELECTRODE WITH OTHER CONNECTOR
IoLine IL-pH-A120MF-R Tris compatible pH electrode (PN# 285114410)
Electrode with 3.28 ft (1 m) fixed cable with Metrohm plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 4.7 in (120 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IoLine IL-pH-A170MF-R Tris compatible pH electrode (PN# 285114420)
Electrode with 3.28 ft (1 m) fixed cable with Metrohm plug, Pt diaphragm, electrolyte KCl 3 mol/l, Iodine/Iodide-reference system, sphere membrane, 200 MΩ membrane resistance, A-glass, length 6.7 in (170 mm), 0.47 inch Ø (12 mm Ø), no temperature sensor integrated.
Pricing
IOLINE TRIS COMPATIBLE pH ELECTRODE PLUG HEAD CABLES
L 1 A Tris compatible pH Electrode Cable (PN# 285122456)
S7 coaxial electrode plug (for IoLine pH Electrode), 3.28 ft (1 m) coaxial cable, DIN instrument plug.
Pricing
L 1 EE Tris compatible pH Electrode Cable (PN# 285122501)
S7 coaxial electrode plug (for IoLine pH Electrode), 3.28 ft (1 m) coaxial cable, radiometer instrument plug.
Pricing
L 1 R Tris compatible pH Electrode Cable (PN# 285122534)
S7 coaxial electrode plug (for IoLine pH Electrode), 3.28 ft (1 m) coaxial cable, Metrohm instrument plug.
Pricing
IOLINE TRIS COMPATIBLE pH ELECTRODE CALIBRATION SOLUTION
L 4004 4.00 pH Buffer, 250 mL (PN# 285138032) Pricing
L 7004 7.00 pH Buffer, 250 mL (PN# 285138049) Pricing
L 1004 10.01 pH Buffer, 250 mL (PN# 285138057) Pricing
L 4014 4.01 pH DIN Buffer, 250 mL (PN# 285138008) Pricing
L 6874 6.87 pH DIN Buffer, 250 mL (PN# 285138016) Pricing
L 9184 9.18 pH DIN Buffer, 250 mL (PN# 285138024) Pricing
L 400 4.00 pH Buffer, 1000 mL (PN# 285138727) Pricing
L 700 7.00 pH Buffer, 1000 mL (PN# 285138735) Pricing
L 100 10.01 pH Buffer, 1000 mL (PN# 285138719) Pricing
L 401 4.01 pH DIN Buffer, 1000 mL (PN# 285138098) Pricing
L 687 6.87 pH DIN Buffer, 1000 mL (PN# 285138102) Pricing
L 918 9.18 pH DIN Buffer, 1000 mL (PN# 285138119) Pricing
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