Hanna 1413 Conductivity Standard Solution. HI7031L, 500 mL, NIST

What a 1413 Conductivity Standard Is Actually For One value, 1413 µS/cm, read at 25 °C, in a 500 mL bottle. It is prepared against NIST 2202 potassium chloride in deionised water, and that traceability is what makes the number on the label worth anything. The bottle is sealed and tamper proof, with a five year expiry from manufacture while it stays unopened. A temperature chart is printed on the label. Using an EC Calibration Solution Without Fooling Your Meter Temperature is the part most growers skip. The label value holds at seventy-seven degrees Fahrenheit, and a bottle that has been sitting in a cold shed will not read the same. That chart on the label exists for exactly that reason. Let it come to room temperature first. Give the probe two to three minutes to settle before you accept the reading, and rinse it before it goes back in the reservoir. One honest limit worth knowing. This is a single point standard, sitting close to where most feed solutions run. That makes it the right bottle for a routine check between feeds. A full two point calibration wants a second, much higher value as well. Key Features 1413 uS/cm at 25 °C: The single point most EC meters and most feed solutions are checked against. NIST 2202 traceable KCl: Prepared against a traceable potassium chloride standard in deionised water. 500 mL bottle: Enough for a season of routine checks without decanting from a lab jug. Temperature chart on the label: Read the value for the temperature you are actually working at. Sealed and tamper proof: Five year expiry from manufacture while the seal is intact. Let the probe settle: Two to three minutes in the solution before the reading counts. Single point, by design: A full two point calibration needs a second, far higher standard as well. Technical Specifications Specification Value Brand Hanna Instruments Part Number HI7031L Type Conductivity standard solution Conductivity Value 1413 uS/cm Reference Temperature 25 °C, 77 °F Volume 500 mL, about 16.9 fl oz Composition Potassium chloride in deionised water Traceability Prepared against NIST 2202 SRM potassium chloride Label Temperature chart printed on the bottle Packaging Air-tight bottle, tamper-proof seal Shelf Life 5 years from manufacture, unopened With Certificate HI7031L/C, the same standard supplied with a COA Smaller Bottle HI7031M, 230 mL Second Calibration Point HI7030L at 12,880 uS/cm, for two point calibration Use Calibrating EC, TDS and conductivity meters