The HI991300 is a slim, lightweight, and waterproof portable meter that measures pH, conductivity (EC), total dissolved solids (TDS) and temperature with a single amplified probe.

• 3 in 1 amplified probe with pH, EC/TDS and temperature sensors
• Quick Cal Mode to calibrate pH and EC/TDS with one solution
• EC to TDS Conversion factor selectable between 0.45 and 1.0

Features at-a-glance

• 3 sensors in a single probe

pH electrode - Preamplified for resistance to electrical noise including that generated by pumps and ballast

EC/TDS sensor - amperometric two pole design

Temperature - NTC sensor for accurate temperature measurement and compensation

• Waterproof

Designed to withstand the humidity of a growing environment

• Wide pH Range

pH range is from 0.00 to 14.00 pH

• Selectable EC to TDS conversion factor

Choice of either a 0.5 or 0.7 conversion factor

0.5 (500 CF) conversion factor is for an EC reading of 1000 μS/cm = 500 ppm

0.7 (700 CF) conversion factor is for an EC reading of 1000 μS/cm = 700 ppm

• Automatic Temperature Compensation

All readings are compensated for variations in temperature

Temperature displayed in oC or oF along with pH, EC or TDS reading

• Stability indicator

Meter displays a clock tag that will disappear when the reading has achieved stability

• HOLD button

Freezes reading on the display to allow recording of measurement

• BEPS (Battery Error Prevention System

Meter will automatically shut off if there is not enough power to get an accurate measurement

• Battery % level at startup

• Low Battery Indicator

When the level is below 5%, the  battery symbol on the LCD blinks to indicate a low battery condition.

• Auto-off 

User selectable automatic shut-off ff to conserve battery life. Options are after 8 minutes, 60 minutes , or disable