Chem-Tech Series XP peristaltic dosing pumps from Pulsafeeder have an electronic timing circuit that provides reliable pump control without relying on mechanical adjustment components that may wear over time. The interface and controls provide easy operation, and the peristaltic design is virtually maintenance-free. They have a heavy-duty gear train and computer-aided peristaltic design and are available in fixed-rate, adjustable, pulse-input, flow switch-activated, dry-contact input and timer models. A variable model with control electronics that allow a variety of choices of input signal types and onboard-timer programs to customize to any application is available. 800/333-6677; www.pulsatron.com.