The PULSAtron Series A Plus offers manual function controls of stroke length and stroke rate as standard, with the option to select external pace for automatic control. Other optional features include external stop function and 1000:1 turndown control. Ten distinct models are available, having pressure capabilities to 250 psig (17 bar), and flow capacities to 58 gpd (9.1 lph), with a turndown ratio of 100:1. Metering performance is reproducible to within +/- 3% of maximum capacity.