HI50021P is a premium quality calibration check solution used exclusively for the HI9813-6 portable pH/EC/TDS/Temp

The front of the meter has two buttons

Removes existing scale — restores operating efficiency to near-new levels

Easy cartridge replacement with included wrench

Hanna HI50021P Calibration Check Solution for HI9813-6 (25 x 20 mL Sachets) lab accessories HI50021P is a premium qualityHI50021P is a premium quality calibration check solution used exclusively for the HI9813 6 portable pH EC TDS Temp. meter. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is opened. Hanna's line of solutions have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet. The HI50021P is for 25 sachets containing 20 mL