• Measure any combination of DO, pH, ISE, ORP, conductivity, salinity, TDS and temperature
• Rugged IP67 construction features Mil-spec connectors and rubber over-molded case
• 5000-point memory (GLP compliant)

Count on the ProQuatro meter for exceptional flexibility in multiparameter measurements. Use it for a variety of parameter combinations, including dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature. It's also a very powerful lab instrument for BOD testing. Selecting the parameters you want to measure is simple—just use the corresponding probes and cables (sold separately).

View measurements for up to four parameters at a time on the backlit graphic display. The display also features a Hold function and battery indicator. On-screen instructions make calibration easy. A built-in barometer automatically compensates for changes in barometric pressure, improving measurement accuracy and eliminating manual input.

The ProQuatro offers superior data management. This GLP-compliant meter stores up to 5000 data sets you can recall on the display or download to your computer for further manipulation. Data Manager software (free download from YSI's website) lets you transfer and edit individual or total data; view graphical or tabular data at the instrument, date, site or folder level; and export data to other software programs, such as Microsoft® Excel. Meter firmware upgrades and enhancements are also free at ysi.com.

For a complete system, order this meter along with a cable and probes suitable for your application.

Includes: Quick Start Guide, USB flash drive with digital copy of the user manual, two C batteries and USB 2.0 cable. 3-year warranty.