TDS Meter by NovoBlue - 2-in-1 Digital Tester Pen for Drinking Water, Hydroponics, Coffee, Aquarium, Pool, Hot Tub, Spa,

??PROFESSIONAL QUALITY METER - Conveniently measure total dissolved solids and temperature of water
??ACCURATE & RELIABLE - Automatic Temperature Compensation (ATC) prevents inaccuracies
??POCKET-SIZED PORTABILITY - At 1.3 oz the NovoBlue TDS Meter is the lightest meter on the market
??BONUS EC & WATER HARDNESS CHART - Find out if your water is classified as