Help with Ion Selective Electrodes specifications:
Electrode Type
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| Electrode Type | |||
| Your choices are... | |||
| Ammonia (NH3) | |||
| Ammonium (NH4+) | |||
| Bromide (Br-) | |||
| Cadmium (Cd2+) | |||
| Calcium (Ca2+) | |||
| Carbon Dioxide (CO2) | |||
| Chloride (Cl-) | |||
| Chlorine (Cl2) | |||
| Cupric (Cu2+) | |||
| Fluoride (F-) | |||
| Fluoroborate (BF4-) | |||
| Iodide/Cyanide (I-/CN-) | |||
| Lead (PB2+) | |||
| Nitrate (NO3-) | |||
| Nitrite (NO2-) | |||
| Nitrogen Oxide (NOX) | |||
| Oxygen/BOD (O2) | |||
| Perchlorate (ClO4-) | |||
| Potassium (K+) | |||
| Silver/Sulfide (Ag+/S2-) | |||
| Sodium (Na+) | |||
| Surfactant (X+/X-) | |||
| Thiocyanate (SCN-) | |||
| Water Hardness (X2+) | |||
| Other | Other unlisted ion. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Performance Specifications
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| ISE Concentration Range: | Full required range of concentration measurement. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| ISE Accuracy: | Required accuracy of reading. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| pH Range: | Full required range of pH to measure. Ion Selective Electrode measurement is dependent upon pH. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Response Time: | Typically given as time to reach 95% of final value. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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Electrode Configuration
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| Your choices are... | |||
| Half-cell | Half cell systems require a separate reference electrode. | ||
| Combination | Electrode is composed of two parts, the measuring electrode and the reference electrode. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Mounting Options
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| Mounting Options | |||
| Your choices are... | |||
| Hand Held or Portable | Typically used for laboratory purposes. | ||
| In-Line (Insertion) | Insertion/retraction without disturbing flow; includes "side stream". | ||
| Flow Thru (Pipeline) | Integral flanges or other pipe connection; directly into existing pipeline. | ||
| Other | Other unlisted mounting option | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Dimensions
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| Maximum Diameter / Width: | |||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Maximum Length: | |||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Sample Type
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| Your choices are... | |||
| Aqueous | |||
| Non-Aqueous (Dry) | |||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Electrode Membrane
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| Electrode Membrane | |||
| Your choices are... | |||
| Glass | The most familiar type of sensing electrode; tailored to produce an increased affinity for various actions. A glass membrane is routinely used for measuring pH and some ions. Sodium Electrode. Produces an increased affinity for various cations. | ||
| Solid State | This sensing membrane is made of a uniform or homogeneous solid substance; a single crystal. Fluoride Electrode. | ||
| Liquid - Ion Exchange | Membrane is a layer of water-immiscible liquid through which ions can be exchanged. Nitrate & calcium electrode. | ||
| PTFE/Gas Sensing | Plastic body with a hydrophobic gas permeable membrane; this electrode responds to dissolved gases in solution. The dissolved gas diffuses across the membrane into a small volume of buffer, specific for each electrode. Reaction of the gas with the buffer causes a pH change sensed by an internal glass pH electrode. Because the reference element is built-in, a separate reference electrode is not necessary. Carbon dioxide and ammonia are among the species measured by this type of electrode. | ||
| ISFET | Ion Selective Field Effect Transistor; this type of electrode contains a transistor coated with a chemically sensitive material to measure pH in solution and moist surfaces. As the potential at the chemically active surface changes with the pH, the current induced through the transistor varies. A temperature diode simultaneously monitors the temperature at the sensing surface. The change in current and temperature are correlated by the pH meter to a temperature compensated pH reading. | ||
| Plastic | This type of electrode has an ion exchange material contained in a solid plastic membrane. The sensed ion is exchanged across the membrane, creating the potential. | ||
| Other | Specialized or unlisted membrane style. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Features
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| Built-in Temperature Sensor? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Temperature Compensated? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Environmental Operating Conditions
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| Operating Temperature Range | |||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Operating Pressure Range | |||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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