Usually, meter controls are more expensive than time-clock controls and two tanks increase the cost. Hardness sensor control. Sensor detects hardness of the softened water and initiates regeneration when needed. This minimizes potential for unnecessary regeneration, but is usually the most expensive type of softener. That depends on appliance life and cleaning requirements.
Water softeners reduce corrosion, extend appliance life and reduce water heating costs.
However, softeners have only been economically justified when a high value is placed on convenience of reduced cleaning. Recommended steps in selecting a home water softener Test water for hardness, iron, and manganese. Select softener size and choose dealer, brand, and model. Discuss the level of service and cost of service the dealer will provide. Softeners with small capacities must regenerate more often.