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ELIT Brand Electrochemical Sensors and Computer-based Instrumentation. Innovative technology at highly competitive prices. |
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Ion-Selective
Electrodes |
Mini ISEs |
Reference Electrodes |
pH Electrodes |
ORP Electrodes |
D.O. Electrodes |
Electrode Heads
ELIT
Ion-Selective Electrodes (ISE)
At the heart of ELIT Electrochemical Measuring Systems
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Want to Learn More About ISEs ? Scroll down (or press down arrow or "Page Down" Key) to see introductory text and diagrams. Also see our Information and Education pages |
![]() CLICK PICTURE FOR ENLARGEMENT AND EXPLANATION | Use ELIT plug-in all-solid-state |
Click any ion name below for electrode specifications and descriptions of methods
for measuring ion concentrations in aqueous solutions.
Ammonium |
Barium |
Bromide |
Cadmium |
Calcium |
Chloride |
Copper |
Cyanide |
Fluoride |
Iodide |
Lead |
Mercury |
Nitrate |
Nitrite |
Perchlorate |
Potassium |
Silver |
Sodium |
Sulphide |
Thiocyanate |
(Sulphate) |
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Click Here for a summary table of specifications for all ELIT ISEs.
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The main advantages of Ion-Selective Electrodes are:
Note: ISEs are not generally used as precise analytical tools. Nevertheless, routine, rapid measurements can usually be expected to have an accuracy of around ± 10% and with careful analysis under ideal conditions some can achieve an accuracy and precision of better than ± 2% (1-sigma) - see chapter on Accuracy and Precision in our Beginners Guide to ISE measurements. Ion-Selective
Electrodes measure the activity (or effective concentration)
of ions in a solution, rather than the actual concentration; the activity is always less than
the concentration because of
Other Essential (included) Components of an ELIT Ion Analyser:
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ELIT ion selective electrodes These electrodes have a solid state membrane and a solid internal contact - i.e. they do not contain any liquid or gel electrolytes. Their characteristics and advantages are:· Simple gold-plated plug-in connectors. · Robust and Durable. · Easy to handle. · Stable electrochemical potential. · Fast response time. · Function in any position. · No leaking of fluids. · Long shelf life and working life. · Can be stored and transported below 0°C. |
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The ELIT Electrode Head System
ELIT Electrode Heads are manufactured
from a robust plastic material and fitted with low noise cables and
connectors which are compatible with any standard mV/pH/ion meter. Advantages of this 'electrode combination' over conventional combination electrodes:
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Six types of ELIT Heads are currently available:
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ELIT Mini ISEs Nico2000 Ltd can also supply Mini ISEs with a range of tube diameters and lengths for special applications. These electrodes are fitted with a simple wire connector to allow maximum flexibilty for connecting to other equipment and are not suitable for use with the ELIT electrode head system.
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ELIT Reference Electrodes
These electrodes are of a robust design
with 8mm diameter PVC bodies and gel electrolytes. Made to be compatible with ELIT ISEs, they must also be connected to the measuring system via an ELIT
Electrode Head. |
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ELIT pH Electrodes
ELIT pH electrodes are basic combination electrodes with glass membranes and AgCl reference systems. They are fitted with cable and BNC connector for connection to any type of measuring system and do not require an ELIT electrode head connector or separate reference electrode. |
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ELIT Dissolved Oxygen Electrodes (DO)
Introduction to DO sensors: Type Output at Saturation Output at Zero Oxygen Polarisation Voltage Membrane 601 Polargraphic 600nA +25% <1% Saturation 800 mV Teflon 602 Polargraphic 60nA +25% <1% Saturation 800mV Teflon 603 Galvanic 33-40mV <1% Saturation N/A Teflon When ordering please specify: 1) Length of cable required in metres.
e.g. 601/2/Th10k/5pin DIN. = 601 with 2m cable, 10k Thermistor ATC and 5 pin DIN Connector |
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CCR - - - Nico2000 Ltd - - - Last Update: 12 Feb. 2009