GroLine Waterproof EC/TDS/Temp (ppm) TESTER/PEN with Case + Solutions Jiffy 560" ID before you order

560" ID before you order the coil

Complete with package instructions

Pre-charged with refrigerant

MERV-11 filtration is standard

Uncle John's Blend™ supplies a low molecular weight form of potassium

GroLine Waterproof EC/TDS/Temp (ppm) TESTER/PEN with Case + Solutions Jiffy 560" ID before you orderGroLine Waterproof EC TDS Temp (ppm) TESTER PEN with Case & Solutions The HI98318 is Hanna Instruments' latest waterproof pocket meter for measuring the EC TDS of a hydroponic nutrient solution. Automatic calibration is achieved easily. Simply submerge the sensor in a calibration solution and the meter will automatically detect the calibration standard (5. 00 mS cm in Quick Cal mode or 1. 41 mS cm in standard calibration mode). Temperature is