Orion Calcium Hardness Monitor

The Orion 1820 Calcium Hardness monitor is one of a series of 
microprocessor-based analyzers designed to measure trace ion levels in 
relatively pure water continously. 
The Orion 1820 has been specifically designed to operate in the effluent 
of a zeolite exchanger in a water softening system.

A unique system for pH adjustment eliminates the need for expensive 
reagents and frequent maintenance. Instrument calibration is quick, 
simple, highly reliable and accurate using a simple pipet. A temperature 
sensor, immersed in the sample, monitors sample temperature and is 
used for automatic temperature compensation. 
A signal conditioner offers the choice between linear and logarithmic 
concentration output. Since the Orion 1820 has been designed with few 
moving parts, it requires little maintenance and is extremely reliable.