HYDROMETER TEMPERATURE CONVERSION HOW TO

You can get away with a usable measurement as long as the sample is within 4-5 degrees of 77☏. This hydrometer is calibrated at 77☏ meaning the water your measuring needs to be heated to 77☏ (or as close as possible) for an accurate measurement.

HYDROMETER TEMPERATURE CONVERSION HOW TO

Get Some valuable tips for using Tropic Marin Salt Mix and learn how to choose the right salt for your reef tank.īeing made of glass, the unit is fragile so breakage is a small risk and it does not have ATC - automatic temperature compensation so the temperature of the saltwater your measuring matters.

It never requires additional calibration checks and will continue providing accurate measurements for many years when cared for properly.

Tropic Marin's version is coveted for being highly reliable because every single one is made of hand-blown glass and calibrated before packaging. Furthermore, traditional analog refractometers also need a substantial natural light source to take a measurement.įloating glass thermometers have been around for decades and will provide users with quick and accurate specific gravity readings almost instantaneously. The downside is they can fall out of calibration easily, requiring frequent checks and re-calibration. They work great, are fairly simple to use, and can generally provide both specific gravity and salinity measurements. Refractometers are hands down the most widely used method of measuring specific gravity. The Tropic Marin Floating Hydrometer is most certainly one of those scenarios. Technology like this certainly has its place in the hobby but sometimes, there is just is no reason to change what is not broken. Digital testing equipment that produces accurate results and reduces the risk of human error during the testing procedure saves us both precious time and money. However it would be suprising if it was anything other than 20✬ since the ASBC, EBC and IoB all use a definition of specific gravity that has a reference temperature and measurement temperature of 20✬.As modern hobbyists, we sure have it easy compared to days past. The short answer is that the calibration temperature is whatever is used by the online convertor. Since you're measuring an unknown mixture of sugars converting refractive index to Brix to SG is an approximate measure in anycase. However, you should realise that Brix is a measure of the concentration of a sucrose solution and is inferred by the refractometer by the measurement of refractive index. If the standard was defined at a different temperature then the specific gravity value would most likely be different since the thermal coefficient of expansion of the sample and water are usually different. Nowadays, for brewers at least, the SG of a sample is conventionally reported as its density relative to water at 20 degrees Centigrade. I believe the answers from Zymurgist and have missed the point. And generally people will use the same method to obtain their OG and FG so any small differences that might arise between methods should balance out if you're being consistent. But in practice this should be pretty small. For example if you used a refractometer for your OG that was normalizing the Brix value to 70✯, and a hydrometer for your FG that was calibrated at 60✯, I suppose some error could be introduced that might be worth accounting for. If you were using different methods for measuring your OG and FG, I suppose it's possible that you would need to take this into account. So provided yours does as well, you should be fine with just using the straight converted value. From what I've heard, refractometers usually adjust for temperature automatically. So you will want to make sure that your Brix value is temperature adjusted before you do the conversion. That is, if you start with the correct value in Brix, your converted SG value will be correct. Both Brix and specific gravity are temperature sensitive but the conversion seems to be independent of that fact.

Hydrometer temperature conversion