C-1500N Metering Pumps feature a quick adjusting, high accuracy mechanical stroke length control. The pump’s efficient design allows for a minimum stroke length of 5%. The Deluxe Model features stroke length and electronic Time Interval control. The pump’s on time is adjustable from 5-100% of the repeating 5 second time interval. (0.25 – 5.0 sec.) The high frequency of the repeating 5 second time interval, and the extremely accurate mechanical stroke adjustment, result in a higher frequency of small injections per minute.