pH Electrodes, Conductivity Cells, Industrial Electrodes, etc.
pH ELECTRODES
Micro Combination pH Electrodes measure small samples and are available in a variety of sizes, including a needle tip to pierce septa and a long-bodied electrode. With Ag/AgCl references, Micro-pH electrodes provide fast, stable responses with a minimum of sample.
pH electrodes are tough epoxy bodied combination pH electrodes with a gel filling so you never need to worry about electrode maintenance or refilling again. They are compatible with nearly every pH meter straight out of the box or with a simple adapter cable.
Single or double junction for demanding application
Choice of sizes and lengths available.
Standard models feature an extended body which protects the sensitive pH sensing bulb. You can even use an EpoxyTough to stir your sample with to get a fast stable reading.
Specifications:
pH Range: 0-14pH
Response: 95% in one second (bulb types)
Body material: Glass or Epoxy
Isopotential Point: 7.0 pH (0 mV)
Offset: +/- 0.20 pH
Cable length : 75cm
Connectors: BNC
Adapters are available for DIN and US STD. Other connectors are also available as special order.
Type
pH Range
Temp °C
Applications
Combined Electrodes for pH Meters
ST21
0-14
20-100
Glass Body
ST22
0-14
20-80
Epoxy Body
ST23
0-14
20-100
Micro Type
ST24
0-14
20-100
Flat Surface
Single pH Electrode
ST01
0-14
20-100
Glass Body - use with Reference
REFERENCE ELECTRODES
Reference Electrodes are necessary to complete a measuring circuit, when using half cell sensing electrodes. The reference electrode is usually based on Silver or Mercury.
Cat#
Description
Temp °C
ST11
Glass Body - Hg/HgCl2
0-70
ST13
Glass Body - Ag/AgCl
0-100
ST14
Glass Body - Hg/HgSO4
0-70
METALLIC ELECTRODES
Oxidation Reduction potentials are measured by using ORP Sensors. The common metals used are Platinum and Silver.
ORP electrodes are provided with a platinum sensor for most applications
Featured in this section are plastic body ORP (REDOX) electrode bodies constructed of epoxy.
Only high grade platinum is utilized for outstanding performance. Both rod and band technology is available.
Silver is also available as alternate sensing noble metals
Cat#
Description
ST31
Single Silver - Use with reference
ST32
Combined Silver
ST33
Single Platinum - Use with reference
ST34
Combined Platinum
ST35
Double Platinum - KF Titrations
CONDUCTIVITY CELLS
Electrolytic conductivity is a measure of the ability of a solution to carry electric current . Solutions of Electrolyte, conduct an electric current by the migration of ions under influence of an electric field.
In most cases, conductivity measurement in water solutions indicates the concentration of dissolved salts. This gives important information when determining water quality or monitoring a specific ion in an industrial process such as salt in food manufacture.
Type
Cell Constant
Applications
Glass
Epoxy
ST41
ST44
0.5
Lab Use, Drinking water
ST42
ST45
1.0
Lab Use, Drinking, Surface & Waste Water
ST43
ST46
0.1
Boiler feed water
Autoclavable / Steam Sterilizable Electrodes
Sensor Tech offers high temperature, Steam Sterilizable Sensors for several types of process controls. pH monitoring plays pivotal role in process industries. Sensor Tech sensors are specially designed for critical biotech applications in various processes.
Chemical processes necessitate sensors to withstand acids or strong alkaline solutions at high temperatures.
Bioprocesses require Stream Sterilized Sensors in bio-reactors and fermentation vessels. Sensor Tech electrodes provide stable results and with stand repeated steam sterilization cycles.
Built in temperature - optional
Compatible with any pH transmitter / Meter
Cat#
Description
pH Range
Temperature Range °C
ST53
Sealed, Threaded (High Temp.) 120mm PG 13.5
0-14
0-130
ST53
Sealed, Threaded (High Temp.) 175mm PG 13.5
0-14
0-130
ST53
Sealed, Threaded (High Temp.) 225mm PG 13.5
0-14
0-130
ST53
Sealed, Threaded (High Temp.) 325mm PG 13.5
0-14
0-130
INDUSTRIAL ELECTRODES
Process applications present some major challenges to the pH measurement system. The most common are long distances, temperature extremes, electrical interferences, high pressure, junction poisoning or fouling and chemical/physical breakage. For each of these common problems, developed specific electrodes for excellent performance in all types of process applications.
Due to the high resistance of the glass membrane inside a pH electrode, conventional pH measuring systems utilize high impedance signal transmission. Poor insulation of the electrode connectors and cables results in high susceptibility to electrical leakage/noise and humidity which tends to give erroneous pH readings. As a result, particular care has to be taken in connecting the electrode to the metering system. For this conventional system, the cable length is restricted to typically less than 33 feet (10 m). A high impedance meter is required and it is necessary to provide for high insulation at all connections.
