GH 1500 PPM Calibration Solution 8 oz.

General Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of pH, EC, and TDS meters (NaCl scale or 442 scale). General Hydroponics® technicians check every batch to ensure that our solutions are accurately calibrated and deliver reliable readings every time they are used.

Technical Data Sheet

• Presentation: 8 oz (237 ml) bottle.
• Reference solution for calibrating EC and TDS meters of the most popular brands.
• Reference value: 1500 ppm on the NaCl scale.
• Equivalence: 2190 ppm on the 442 scale.
• Conductivity: 2930 microsiemens.
• Each batch is checked by General Hydroponics technicians before leaving the factory.

How to use

• Rinse the electrode with distilled water and dry it carefully before calibrating.
• Pour a portion of the solution into a clean container and calibrate there; never insert the meter into the original bottle.
• Discard used solution: do not return it to the container, as it will contaminate the rest.
• Allow the solution to reach room temperature before reading, as conductivity varies with temperature.
• Recap the bottle immediately to prevent evaporation and prolonged contact with air.
• Store it closed, in a cool place without direct light, and replace it if you notice turbidity or suspended particles.