Pure Water (Low) Conductivity Sensors SC4A/SC42

In pure water applications, the accuracy of measurements is strongly influenced by temperature variations, polarization effects at the surface of the electrodes, and cable capacitances. 

Yokogawa’s SC42 and SC4A contacting conductivity sensors are available from a combination of FDA-approved wetted materials, making them ideal for the monitoring of pure water systems used in the preparation of injectable solutions.

The SC42 and SC4A are also ideal for use in many low conductivity applications including:

  • Semiconductor
  • Power
  • Pharmaceutical
   SC4A   SC42 Small-Bore 
Base Model Code SC4A SC42 Large Bore SC42 Small Bore
Cell Constants 0.02/cm; 0.1/cm 0.01/cm; 0.1/cm 0.02/cm; 0.1/cm; 1.0/cm
Ranges 0.04-400 µS/cm; 0.2-2,000 µS/cm 0.02-2,000 µS/cm; 0.2-20,000 µS/cm 0.04-400 µS/cm; 0.4-2,000 µS/cm; 4.0-5,000 µ/cm
Temperature Element Pt1000 Pt1000 Pt1000
Pressure Rating 10 bar/142 PSIG 10 bar/142 PSIG 7 bar/100 PSIG
Maximum Temperature 110°C/230°F 150°C/302°F 100°C/212°F
Installation Connections 3/4" NPT Fitting; 1", 1.5" or 2" Tri-Clamp' Retractable Requires FD40, FS40 or FF40 Holder 3/4" NPT Fitting; 1", 1.5" or 2" Tri-Clamp
Integral Cable YES NO YES
Materials Of Construction 316 Stainless Steel or Titanium, FDA-compliant wetted materials 316 Stainless Steel 316 Stainless Steel or Titanium
Design Style 2-Electrode 2-Electrode 2-Electrode
Application Note

There are a number of suppliers of oil and fat products used for edible purposes. These products include, but are not limited to olive oil, peanut oil, soybean oil, sunflower oil, lard, shortening, butter, and margarine. The raw materials for these products include animal by-products, fleshy fruits (palm and olive), and oilseeds. 

Industry:Food and Beverage

Application Note

Measurement and control of Heat Exchanger Leakage can help prevent costly maintenance, repair and downtime. The simple, essentially maintenance-free measurement of condensate conductivity will give the operator information necessary (or provide automatic control) to prevent severe damage to the boiler should a breakthrough of the heat exchanger occur.

Application Note

To defray energy costs, many industrial plants have their own boilers to generate steam to produce a portion of their energy needs. In addition to generating power, the steam may also be used directly in plant processes or indirectly via heat exchangers or steam jacketed vessels. 

Application Note

Ion Exchange is a method for the exchange of ions between two electrolytes or between an electrolyte solution and a complex molecule. In most cases the term is used to denote the processes of purification, separation, and decontamination of aqueous and other ion-containing solutions with solid polymeric or mineralic ion exchangers.


Looking for more information on our people, technology and solutions?

Contact Us