AS7250Inductive Conductivity Sensor

High operating temperatures degrade standard analytical sensors by softening seals, increasing reference electrolyte diffusion, and damaging glass membranes. The AS3250 pH electrode utilizes special high-temperature gel formulations and 400 Mohm glass impedance to withstand steam sterilization up to 130°C. The AS6800 polarographic DO sensor features a 316L body and reinforced steel mesh membrane head rated for 135°C sterilization at 1.5 bar. For conductivity, PEEK-molded AS7250 inductive sensors operate up to 150°C and 12 bar. Automatic temperature compensation must be configured in paired transmitters. Since combined high temperature and chemical aggressiveness reduce lifespan, performance must be confirmed for the selected configuration. Send us your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output.

Clean-In-Place (CIP) systems utilize aggressive chemical concentrates such as 2-5% sodium hydroxide and nitric acid solutions that rapidly corrode or foul traditional contacting conductivity electrodes. The AS7250 inductive (toroidal) sensor measures conductivity magnetically through enclosed primary and secondary coils inside a seamless PEEK or PFA toroidal housing. Covering 0.05 to 2000 mS/cm across temperatures from -20°C to 150°C and pressures up to 12 bar, it withstands thermal shocks and CIP chemical attack without maintenance. When paired with CurioSens transmitters, internal acid/base concentration tables automatically convert mS/cm into solution weight percentage. Concentration curve selection must be confirmed for the selected configuration. Send your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output.

Aggressive process streams containing concentrated sulfuric acid, hydrochloric acid, or hot caustic solutions destroy metal electrodes. The AS7250 inductive conductivity sensor encapsulates its toroidal coils entirely inside chemical-resistant PEEK or PFA polymers. PEEK offers mechanical strength and resistance to CIP thermal cycling up to 150°C and 12 bar pressure. PFA provides chemical inertness against harsh oxidizing acids. Both materials feature smooth, non-porous surfaces that resist scale buildup and biological fouling. Process mounting options include companion flanges or threaded fittings with integrated PT1000 temperature elements. Material selection for specific acid concentrations must be confirmed for the selected configuration. Share your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output for assistance.

Selecting conductivity technology depends on fluid conductivity and fouling potential. 2-pole contacting sensors like the AS7000 measure current between two stainless steel electrodes, providing maximum precision in ultrapure water lines (0-2000 uS/cm). 4-electrode sensors like the AS7100 use separate drive and sense electrodes to eliminate polarization across medium-to-high ranges (0.02-500 mS/cm) in pharmaceutical buffers. Inductive toroidal sensors like the AS7250 use magnetic coils in a PEEK/PFA torus, measuring highly conductive or dirty liquids (0.05-2000 mS/cm) electrodelessly without surface fouling. Sensor cell constant matching must be confirmed for the selected configuration. Provide your medium, flow range, pressure, temperature, viscosity, tube size, process connection, and required output for recommendation.