Hanna Instruments 1500 mg/L (ppm) TDS Calibration Solution, 20 mL - Case of 25 Container Size:20 ml - Case of 25 The Bluelab Alarm Box provides

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Hanna Instruments 1500 mg/L (ppm) TDS Calibration Solution, 20 mL - Case of 25 Container Size:20 ml - Case of 25 The Bluelab Alarm Box providesHanna Instruments 1500 mg L (ppm) TDS Calibration Solution is a premium quality 1,500 mg L (ppm) TDS calibration solution that is NIST traceable and contained in portable single use sachets. Each Hanna Instruments 1500 mg L (ppm) TDS Calibration Solution 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 TDS calibration solutions have been specially