got myself a new toy

[blout]

Well i knew that floating refractometers were not very accurate so i got a new toy and i was amazed with the results old results said salinity was 1.021 when i got my new toy the results were totally diffrent very diffrent 1.026 to be pracise. i must admit it cost alot but now i know the truth its made by deltec and is very easy to use,new refratometer

 

[jflowers]

How much was it? I was thinking of getting one of those.

Jon

 

[blout]

How much was it? I was thinking of getting one of those.

Jon

they cost around £35 to £40 depending on where you get it from i got my one for £25 but thats mates rate even at those prices they are well worth it sorted me out i corrected the salinity and now my cynao is almost gone (i dont know if it was because the salinity was to high but now i have corrected it its on the run big time)

 

[Def]

Hmm, I specifically remember reading about this in "Conscientious Marine Aquarist". Apparently the refractometers are calibrated at 65 degrees, so a reading from your tank (at 80degrees-ish) of 1.026 actually corresponds to an SG of 1.022 (or maybe vice versa, I don't recall exactly).

 

[Opcn]

Well, SG is measured at 25 C in scientific settings so if the company likes being standard in there measurements they should measure correctly at 25 C

 

[Navarre]

I have exactly the same refractometer. great bit of kit! much more accurate than a standard hydrometer

 

[Salt Freak]

I want one how do they work excatly does the water evaporate and show only the salt i'm confused.

 

[blout]

you place some drops of water from your tank onto the glass slip the top part over then look through like a telescope, inside there all the info i cant really get a pic of it as its small

 

[blout]

Hmm, I specifically remember reading about this in "Conscientious Marine Aquarist". Apparently the refractometers are calibrated at 65 degrees, so a reading from your tank (at 80degrees-ish) of 1.026 actually corresponds to an SG of 1.022 (or maybe vice versa, I don't recall exactly).

that is true but when you put that small amout of water on there it wount stay at that temp as it will chill very quickly because its such a small area of water (if that makes any sence)

 

[Navarre]

Refractometers are unnefected by temperature. they work on ppm. so the ppm should be around 35ppm for seawater, this is reagardless of temperature

 

[Opcn]

Sorry Navvare it may give out a reading in ppm but it is quite imposible to measure ppm in any means that is not affected by temperature because all our measurements are volume related (light refraction is related to density which is related to volume) and temperature has a big effect on volume

 

[blout]

Sorry Navvare it may give out a reading in ppm but it is quite imposible to measure ppm in any means that is not affected by temperature because all our measurements are volume related (light refraction is related to density which is related to volume) and temperature has a big effect on volume

these feature ATC (automatic temperature compensation) so is always correct no matter what the temp of water is, the reading is not given out in ppm but PPT and SG

 

[Navarre]

Sorry my mistake.. not ppm but ppt.
Regardless, it works errispectif of temperature

 

[blout]

Sorry my mistake.. not ppm but ppt.
Regardless, it works errispectif of temperature

i knew what you ment buddy