HI 991300 • HI 991301 Waterproof pH, EC, TDS & Temperature Meters 4 instruments in one! - pH, conductivity, TDS and temperature all in one meter with a single probe. Waterproof - HI 991300 and HI 991301 are housed in a compact waterproof, IP67 rated case. Tailor made for your application - Customize pH/EC calibration, select EC/TDS conversion factor and temperature coefficient and choose the temperature scale that best fits your application. Ease of use, accuracy and durability - Two button operation, microprocessor based, rugged instrument and probe construction. Order Information Specifications

These new waterproof instruments offer pH, conductivity, TDS (Total Dissolved Solids) and temperature readings in one easy to use meter. HI 991300 measures low range conductivity and TDS, while HI 991301 measures high range. Both instruments provide full scale pH readings and allow the user to select the temperature readout in Centigrade or Fahrenheit. Other features include automatic calibration, automatic temperature compensation, selectable EC/TDS conversion factor, adjustable conductivity temperature coefficient, stability indicator, Battery Error Prevention System and battery strength percentage guage. All functions are accomplished with only two buttons. When the instrument is turned on, % battery power remaining is displayed preventing unexpected battery failures in the field. Calibration is quick and simple at one or two points and the user can select between the instruments’ memorized NIST or standard pH buffers. Conductivity and TDS calibration is also automatic with five programmed values to choose from. Depending on the application, the user can select the conversion factor between conductivity and TDS, as well as the temperature coefficient factor. All calibration and user settings are saved even during battery replacement. The HI 1288 multiparameter probe compliments the meters’ outstanding features: the pH sensor utilizes gel electrolyte and a cloth junction for longer life, faster response and greater durability. The conductivity/TDS sensor is composed of graphite. This new technology eliminates oxidation and polarization errors which are the main causes for erroneous readings and frequent calibration. For added protection, the probe is housed in a rugged plastic sheath with reinforced rubber cable and steel DIN connector.

HI 991300 is supplied with pH/EC/TDS/°C probe, batteries and instructions in a hard carrying case.
HI 991301 is supplied with pH/EC/TDS/°C probe, batteries and instructions in a hard carrying case.