Reliable water analysis starts with measurements you can trust in the lab and on site. This professional handheld family measures pH, ORP and temperature, with a high-impedance BNC input for interchangeable pH or ORP electrodes and banana sockets for Pt1000, NTC 10k or NTC 30k temperature sensors.
Daily handling stays clear and practical. The backlit dot matrix display shows large values, Min/Avg/Max statistics or a live chart, while guided pH calibration supports manual buffers as well as GPH and DIN buffer recognition. Automatic or manual temperature compensation helps improve pH measurement quality across changing sample conditions.
For field work, the IP 67 housing, side protection, foldable stand and rear magnet support flexible use in demanding environments. PRO 515 adds file-based logging for up to 1 million data sets, with CSV readout via USB C mass storage and date/time stamps from the integrated real time clock.
The high-impedance BNC input accepts standard pH and ORP electrodes. It supports interchangeable electrodes for applications where probes are selected or replaced according to the measuring task.
Two 4 mm banana sockets connect a separate temperature sensor, an electrode with integrated temperature sensor or a reference electrode. Supported sensor types include Pt1000, NTC 10k and NTC 30k.
The instrument offers several measurement screens, including large digit single value, multi-row view, statistical display and chart view. Up to three enabled parameters can be shown graphically.
HOLD freezes the current values on the display. REL shows a measurement relative to a user-defined reference value, and Min/Avg/Max statistics can be reset for a new calculation.
Configurable alarm thresholds can be assigned to a selected measure or channel. Alarm signaling can use the buzzer, optical indication with flashing backlight and red status LED, or both.
PRO 515 records automatically with manual start/stop or as single manual recordings. Logging intervals range from seconds to 1 hour, and files can be accessed through USB C mass storage.
The instrument runs on 4 AA alkaline batteries or external 5 Vdc power via USB C. Auto-off and configurable backlight settings support power management.
The multilingual menu supports display selection, chart setup, favorite functions, protected mode with PIN, date and time setting, dark mode and factory reset.
