Oxygen molecules in contact with the luminophore absorb the electrons' energy, thereby reducing the intensity and duration of the emitted red light. This extinction phenomenon is measured by the photodetector and converted, using the reference red LED, into dissolved oxygen concentrations. The faster the extinction, the higher the dissolved oxygen concentration. In summary, oxygen measurement by luminescence is a physical measurement based on a time-based assessment.

Presentation:

HI98198 comes in a case and includes an optical O2/°C probe HI 764113 with a Quick DIN connector and a 4-meter cable, a protective sleeve for the probe, two 100 mL beakers, zero oxygen solution, a 1.8-meter USB Type-C cable, and batteries.

Key Features:

• Digital optical probe with Quick Connect compatibility.
• Robust IP 67-rated housing.
• Large matrix backlit screen with multifunction virtual keys.
• Contextual help menu.
• Measurement ranges in % saturation or concentration (mg/L).
• Automatic temperature correction with single-point calibration.
• Salinity correction for accurate dissolved oxygen readings in seawater.
• User-adjustable salinity value.
• On-screen visual alarm for calibration delay (programmable interval).
• Built-in conversion algorithms.
• Support for chemical oxygen demand (COD), OUR, and SOUR methods.
• Integrated barometer.
• Automatic altitude compensation with single-point calibration.
• Multiple selectable units (mmHg, inHg, atm, psi, kPa, mbar).
• On-demand memory for up to 4000 measurements.
• BPL (Batch Process Logging) function with data storage for the last 5 calibrations, including date, time, atmospheric pressure, calibration value, and salinity.
• Opto-isolated PC connection via USB Type-C.