The HI2400 is a durable benchtop dissolved oxygen and temperature meter that features a polarographic probe, one or two-point calibration, and a USB port for computer connectivity. This meter offers DO measurements in the mg/L (ppm) or percent saturation (%) range with compensation for temperature, altitude, and salinity.
Two Measurement Modes – The HI2400 gives users the option to display DO readings in mg/L (ppm) or percent saturation (%). In meters that report DO concentration in ppm or mg/L, the solvent is always assumed to be water. In other solvents, the Henry’s Law constant would be different; in those cases, percent saturation should be used as it is incorrect to use ppm or mg/L.Percent saturation is the amount of DO present per amount of DO possible at a given temperature and pressure.
Automatic Calibration – This meter can be calibrated at one or two points: 0% (zero calibration in a zero oxygen solution) and 100% (slope calibration in air). For an accurate calibration, it is recommended to wait for at least 15 minutes to ensure precise conditioning of the probe.
Polarographic DO Probe – The HI76407/2 is a polarographic DO probe that has a silver anode and platinum cathode to determine DO concentration. The pre-tensioned, readymade PTFE membranes can be changed in a matter of seconds without the need to stretch and cut replacements.
Automatic Temperature Compensation – A built-in temperature sensor on the HI76407/2 probe allows calibration and measurements to be automatically compensated for fluctuations in temperature. Temperature is compensated from 0.0 to 50.0℃ (32.0 to 122.0℃).
Altitude and Salinity Compensation – When water is measured at an altitude below sea level, oxygen solubility increases; above sea level, the oxygen solubility decreases. The solubility of oxygen in water is also influenced by the amount of salt the water contains. Users can modify the values in order for the HI2400 to compensate for altitude and salinity during calibration and measurement.
GLP Data – The calibration data including date, time, standards used, and the values for temperature, altitude, and salinity can be accessed at any time by selecting the Good Laboratory Practice (GLP) display option.
Data Logging – The 8000 record logging interval allows the possibility of process and experimental monitoring of DO. The logging interval is automatic with user selectable intervals from 5 seconds to 180 minutes
Data Transfer – With a built-in logging function, measurements are stored in non-volatile memory, and can be transferred to a PC through the USB port using the optional HI92000 software and HI920013 USB cable (both sold separately).