Hanna Marine 35 ppt Salinity Calibration Solution Sachet (20 mL)

This is a single-use sachet of 35 ppt salinity calibration solution, holding 20 mL. It's a marine salinity standard with a value of 35.00 ppt at 25°C, and it's NIST traceable. Use it as a known reference point when checking or calibrating a salinity meter or conductivity probe.

Each sachet is made from light-block foil, so the solution stays fresh until you tear it open. Because it's one-time use, you're always calibrating against clean solution rather than something that's been sitting in a bottle or picked up contamination. The lot number and expiry date are stamped on every sachet, and unopened sachets are formulated to last 5 years from the date of manufacture. A temperature chart printed on the sachet shows the actual ppt value at a range of temperatures, which is handy if your solution isn't sitting right on 25°C.

It suits reef keepers and fishkeepers who rely on a salinity meter or conductivity probe and want to confirm it's reading accurately. It also works well for anyone who wants a portable, no-fuss option to keep in the toolbox or take along for testing away from the tank.

Size: 20 mL sachet. Salinity value: 35.00 ppt at 25°C.