Salinity monitor

[enriquerivas]

Im a new MAAST member and fairly new to the world of salt water tanks. I have a digital "PINPOINT" salinity monitor by American Marine Inc. It has a range of 00.0-200.0 mS on it. Im currently reading 40.4mS. but I dont know what this means, is this a good reading? Can someone please explain it to me. I also have a hydrometer that is currently reading 1.022.

[eleyan]

Your monitor is reading salinity, while your hydrometer is reading specific gravity. look at this table to convert from one to another.
http://www.drydenaqua.com/Graphs_tables/specificgravity.htm

your salinity should be aroung 34-35 which translates to 1.025 @ 76 deg F. One of your instruments is off. Try recalibrating the monitor because it seems too high.

[brewercm]

I double what eleyan stated, one of them is off and it sounds like your or may need calibration. I stick to the good old refractometers.

By the way, welcome to MAAST.

[scuba_steveo]

The monitor is a good monitor and it should be calibrated. You can get the calibration fluid for it from premium for 2 bucks. You should be reading somewhere around 51.5 which translates to 1.025. This is the chart that should have come with the unit.

http://americanmarineusa.com/salinityconversion.html

[Gator]

I have a pinpoint and i love it, i havent had any problems withit. I check it against my refractometer every time i do a water change.