CONSIDER THE ADVANTAGES: Digital, microprocessor-based design with flash technology. Advanced Control features including proportional feed. Weatherproof membrane switch front panel interface. All factory settings are permanently stored in memory. Compatible with all types of chemical feed equipment. Professional Series sensors wtih Teflon reference junctions. Five year comprehensive warranty and technical support. CAT 2000 Pro-Pack: The CAT 2000 Pro-Pack is a complete, factory-assembled automation system which includes a CAT 2000 controller, Professional Series sensors, machined acrylic flow cell, rotary flow sensor and PVC backboard.