This continuous PPM monitor is rugged in design and function. The meter displays both PPM and temperature and is unaffected by electromagnetic fields from pumps located in reservoirs. It has a tested back lit LCD display and that is bright enough to easily see but not strong enough to cause problems with flowering plants. It has both, a temperature and PPM electrode for superior accuracy and reliability. A one point calibration screw is located on the front for easy and reliable accuracy and it is powered by a 120 volt ac to dc transformer. The ruggedly accurate PPM electrode is replaceable and its replacement cost is affordable and easily available.
Retail Price: $106.95
— Ships from Portland, Oregon USA.