Conductivity Sensor SC4AJ
There are two basic sensor styles used for measuring Conductivity: Contacting and Inductive (Toroidal, Electrodeless).
When Contacting Sensors are used, the conductivity is measured by applying an alternating electrical current to the sensor electrodes (that together make up the cell constant) immersed in a solution and measuring the resulting voltage. The solution acts as the electrical conductor between the sensor electrodes.
With Inductive Conductivity (also called Toroidal or Electrodeless), the sensing elements (electrode coils) of an inductive sensor do not come in direct contact with the process. These two matched (identical) coils are encapsulated in PEEK (or Teflon) protecting them from the adverse effects of the process.
There is only one cell factor (constant) for the ISC40 Inductive Sensor. It covers nearly the entire conductivity measurement range ~ 50-2,000,000 µS/cm. Only on the low end (below 50 µS) does the accuracy of the sensor suffer.
Because the ISC40 Inductive sensor is virtually maintenance free; it is the first choice for any application. If the ISC40 cannot be used then it is recommended to use the 4-electrode design, model SC42 large bore sensor.
Description：
Yokogawa has been supplying superior on-line analyzers for monitoring or controlling the conductivity of liquid or solutions.
Now, Yokogawa provides the SC450G four-wire conductivity/resistivity converter, the SC202G and SC202S two-wire conductivity/resistivity transmitters, and the SC100 panel mount conductivity converter. Yokogawa also provides many kinds of sensors for accurately measuring liquid conductivity when using converters/transmitters.
The combination of Yokogawa's converters/transmitter and sensors meets the demanding ultrapurewater requirements of the growing semiconductor and pharmacentical markets in addition to traditional water quality measurements for standard power plant and chemical applications.
The SC4AJ conductivity sensor has a convenient, compact design and is widely used in various applications including boiler water and hydroponics conductivity measurement and pure water resistivity measurement in the semiconductor, food, pharmaceutical, and power industries.
Specifications
| Object of measurement | Conductivity of liquids or solutions |
| Measuring principle | Two-electrode system |
| Cell constant | 0.02 cm-1, 0.1cm-1 |
| Measuring range | 0 - 0.5 to 0 - 200 μS/cm (Cell constant: 0.02 cm-1) (with SC450G, SC202) 0 - 100 μS/cm to 0 - 1 mS/cm (Cell constant: 0.02 cm-1) (with SC100) 0 - 5 μS/cm to 0 - 1 mS/cm (Cell constant: 0.1 cm-1) (with SC450G, SC202) 0 - 500 μS/cm to 0 - 5 mS/cm (Cell constant: 0.1 cm-1) (with SC100; Material: Titanium) |
| Temperature Range | 0 to 110℃ (For electrode) |
| Sterilization for electrode | 135℃ (275℉), within 30 minutes in Steam Sterilization |
| Pressure range | 0 to 1 MPa (For electrode) |
| Sample solution condition | Although flow rate is not limited in measurement, air bubbles should not be mixed in the sample solutions to obtain correct measured values. |
| Temperature sensor | Pt1000 |
| Weight | Sensors: Adapter mounting type (SC4AJ-S-AD-09-002-05): approx. 450 g Adapter mounting type (SC4AJ-S-AD-15-002-05): approx. 520 g Welding socket type (SC4AJ-S-SA-NN-002-05): approx. 670 g 5" welding clamp type (SC4AJ-S-SB-NN-002-05): approx. 550 g 2" welding clamp type (SC4AJ-S-SC-NN-002-05): approx. 670 g Adapters: 3/4" stainles steel adapter (/PS): approx. 110 g 3/4" PVDF adapter (/PF) : approx. 35 g Straight welding socket (/SA1) : approx. 300 g Angle welding socket 15 (/SA2) : approx. 320 g Welding clamp 1" (/SB1) : approx. 330 g Welding clamp 1.5" (/SB2) : approx. 305 g Welding clamp 2" (/SC1) : approx. 350 g |
| Process connection | Adapter mounting, welding socket, welding clamp |
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