The HI9814 arrives with everything you need for successful testing: meter

Professional 5-in-1 Waterproof pH/EC/TDS/Salinity/Temperature Meter

Factory Calibrated — Ready to use out of the box

The volumizer counts up in gallons or liters (settings can be modified)

1 Non-Slip Rubber Base Ring — keeps your unit stable on any surface

Milwaukee MW805 MAX 4-in-1 pH/EC/TDS/Temp. Combo Meter with ATC 800GPD filter The HI9814 arrives with everythingDescription This Milwaukee MW805 MAX pH EC TDS Temp. 4 in 1 combo meter allows you to measure pH, EC (conductivity), TDS and Temp. with a single meter and one single probe. What People Are Saying "Features look Great! Can't wait to order! "Great customer service, I have other Milwaukee meters." "These prices are unreal!" "Logging feature will be awesome!" Summary pH and conductivity are critical for growers. pH can effect plant nutrient and water