The CapCTRL software will turn your WtW pH 3310 instrument into a sophisticated regulation system for water pH and pCO₂ if combined with our digital relay device DAQ-M. The user-friendly software for Windows allows you to calibrate, monitor, log, graph and regulate pH and pCO₂ to any level in your system, e.g., a chamber, holding tank or aquarium.
Applications range from studies of ocean acidification, water chemistry, effects of hypercapnia in aquatic organisms, and water quality control (pH/pCO₂/temp) holdings tanks.
Partial pressure of CO₂ (pCO₂) is measured indirectly as water pH with optional pH equipment from German WTW, e.g. one pH instrument and sensor is required for each tank. With an optional gas control set including a solenoid valve, the system will automatically regulate pCO₂ or pH by injection of gasses, e.g. CO₂ gas for hypercapnic control.
The relationship between pCO2 and pH is obtained by measuring pH in water equilibrated with two different pCO₂ partial pressures (e.g. use a gas mixing system or two different calibrated lab gases) and CO₂ values can be given in any unit you prefer.