Bluelab pH Controller with Hands Free Monitoring and Dosing of Solution<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Doses pH up or down - use with undiluted Bluelab pH up or down solutions</li><li>Easy to navigate menu to program and adjust settings</li><li>Automatic control and monitoring of system pH with reservoirs up to 200 us gallons / 760 l</li><li>Replaceable peristaltic pump， pH and temperature probes</li><li>Flashing high and low alarms</li><li>Please refer the below user manual for reference</li></ul></div><img src="http://ecx.images-amazon.com/images/I/414GZKiBMrL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51GzQSXkXJL.jpg" noproxy>