WEC
The WEC/WDEC410 Series Single and Dual Input Electrodeless
Conductivity Controllers measure conductivity of a solution via an
encapsulated, non-contacting sensor to control replenishment pumps
and alarms. They may be installed in a variety of very harsh
chemical control applications, including oily cleaner baths,
chromates, rinse tanks, fume scrubbers and other concentrated
chemicals up to a conductivity of 1000 mS/cm. 
Four conducivity ranges may be selected to configure the
controller over a wide range of applications. Choice of measurement
units is μS/cm, mS/cm, ppm and % concentration. The non-contacting,
toroidal sensor technology is immune to thin coatings and the
contamination and calibration problems that direct contacting
sensors are prone to.
Integrated datalogging is available to validate performance. A
USB memory stick is all that's needed to extract data and event
logs that include conductivity measurements, temperature and relay
status. Download log files from the USB stick to a PC at your
convenience. It couldn't be easier!