1413uS/cm Calibration Solution - Sachet: G
TDS and EC meters should be calibrated frequently (every 1-4 weeks, depending on use). Do not reuse calibration solution, as once it has been used, it is no longer sterile. Pour a small amount into a shot glass and discard after use or use the sachets. TDS and EC Calibration Solution is available in a variety of sizes ranging from single-use sachets to quart bottles. All calibration solutions that we offer are made by either Hanna, Green Air Products or General Hydroponics. The 1500ppm Calibration Solution will work for the following TDS testers and meters: Hanna Gro'Chek Continuous pH/TDS Monitor (HI981404N), Hanna Gro'Chek Portable pH/TDS/EC Meters (HI9813, HI9813-0, HI9813-6), Hanna pH/EC/TDS/Temp Waterproof Tester (HI98129), Hanna Gro'Chek Continuous TDS Monitor with Large Display (HI983301N), Hanna TDS Tester (DiST1 / HI98300), Hanna EC/TDS/Temp Waterproof Tester (DiST5 / HI98311), Genesis Handheld Combo Meter, Genesis Continuous TDS/Temp Monitor. The 1413uS/cm Calibration Solution will work for the following EC testers and meters: Hanna Gro'Chek Portable pH/TDS/EC Meter (HI9813, HI9813-0, HI9813-6), Hanna pH/EC/TDS/Temp Waterproof Tester (HI98129), Hanna EC/TDS/Temp Waterproof Tester (DiST5 / HI98311), Genesis Handheld Combo Meter, Genesis Handheld TDS/EC/Temp Tester, Genesis Handheld pH/TDS/EC/Temp Tester. The 1300ppm Calibration Solution will work for all Oakton and Milwaukee TDS testers and meters.