Campbell Scientific manufactures versatile and reliable data acquisition and control systems. Our units can be programmed to perform advanced measurement and control functions—-eliminating the need for the supervisory computer to do the minute-by-minute control and data acquisition. Battery-powered operation and onboard data storage ensure reliable operation and data integrity, even during power or communications failure. Control units also have programmable scan rates, measurement types, and recording intervals and can measure nearly every commercially available sensor. We also offer portable, automatic water samplers with faster draw speeds and a 3-year warranty.