High Conductivity Sensors ISC40/SC42

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.  

Model Code	ISC40		SC42 Large Bore
Cell Constants	NA	NA	10.0/cm
Ranges	1-2,00,000 µS/cm	1-2,00,000 µS/cm	20.0-2,00,000 µS/cm
Temperature Element	Pt1000 or 30K Thermistor	Pt1000 or 30K Thermistor	Pt1000
Pressure Rating	Up to 20 bar/290 PSIG *Depending on installation*	10 bar/142 PSIG @ 20°C/36°F; 5 bar/71 PSIG @ 100°C/212°F	10 bar/142 PSIG	2 bar/28.5 PSIG
Maximum Temperature	-20°C/-4°F to 130°C/266°F	-20°C/-4°F to 100°C/212°F	110°C/230°F
Installation Connections	Flange; Tri-Clamp; Flow Thru, NPT, Retractable	Flange; Tri-Clamp; Flow Thru, NPT, Retractable	Requires FD40, FS40 or FF40 Holder
Integral Cable	YES	YES	NO
Materials Of Construction	PEEK	PFA (Teflon)	EPOXY; PVDF (Kynar)	PTFE (Teflon)
Design Style	Inductive (Torodial or Electrodeless)	Inductive (Torodial or Electrodeless)	4-Electrode