Greg
Well, maybe someone should set up a Poll thread on the use of hydrometers calibrated at 15.56 vs 25 C... I think you might be surprised by how many do choose to use higher grade equipment. ;-)
Good try but that will not work
I have been is this hobby for +40 years, knew your dad well, and helped him out on some of his products. I can count on both hands, the total people in this hobby I have heard of, have been on broads for like 20 years, that use a 15C or 60F and I have a finger missing. They are very, very rare in this hobby. And most now are using Refractometers by far or swing-arm hydrometers, set to 77F( the IO self-temp compensating) or a Tropic Marin 12 " floating Hydrometer set to 75 F
Yes, I am well aware of the old school thing. I never get a question on a Alk reading of say 125 ppm and what does that mean but it is often" Boomer can you explain what meq / l really means
An then they say "I should never of asked but thanks "
If you want to hit me with D that is fine but you should now the Salinity std, in NSW, is no D or Sg but Conductivity, dictated by the Salinity Equation of state. D is hardly ever used anymore.
use of terminology as it "should be" not as "it is"
That is not going to work. Randy, Craig Bingman, Tom Frakes , I and others have tried for years and you will NEVER get there and just confuse most of them
The object is to be simple and short. They do not want or should not have to run math equations for Salinity.
Equation for calculating S from a hydrometer reading calibrated at 25 C is
As I said earlier we do not really need that we have Salinity Calculators for that but then again not everybody visits websites/forums and some not at all. Why not just put a table in the Bucket for 25 C and 60 F from 30 - 40 ppt. I have a Excel program that generates such tables.
Here is an example of a 75 F
Salinity60......74......75......76........77......78.......79......80.......81......82.......83.......84.......85.......86
30 1.0247 1.0228 1.0226 1.0225 1.0223 1.0221 1.0220 1.0218 1.0216 1.0214 1.0213 1.0211 1.0209 1.0207
31 1.0255 1.0235 1.0234 1.0232 1.0231 1.0229 1.0227 1.0225 1.0224 1.0222 1.0220 1.0218 1.0217 1.0215
32 1.0263 1.0243 1.0241 1.0240 1.0238 1.0236 1.0235 1.0233 1.0231 1.0229 1.0228 1.0226 1.0224 1.0222
33 1.0271 1.0251 1.0249 1.0247 1.0246 1.0244 1.0242 1.0241 1.0239 1.0237 1.0235 1.0233 1.0232 1.0230
34 1.0278 1.0258 1.0257 1.0255 1.0253 1.0252 1.0250 1.0248 1.0246 1.0245 1.0243 1.0241 1.0239 1.0237
35 1.0286 1.0266 1.0264 1.0263 1.0261 1.0259 1.0257 1.0256 1.0254 1.0252 1.0250 1.0248 1.0247 1.0245
36 1.0294 1.0273 1.0272 1.0270 1.0268 1.0267 1.0265 1.0263 1.0261 1.0260 1.0258 1.0256 1.0254 1.0252
37 1.0301 1.0281 1.0279 1.0278 1.0276 1.0274 1.0273 1.0271 1.0269 1.0267 1.0265 1.0264 1.0262 1.0260
38 1.0309 1.0289 1.0287 1.0285 1.0284 1.0282 1.0280 1.0278 1.0277 1.0275 1.0273 1.0271 1.0269 1.0267
39 1.0317 1.0296 1.0295 1.0293 1.0291 1.0289 1.0288 1.0286 1.0284 1.0282 1.0280 1.0279 1.0277 1.0275
40 1.0325 1.0304 1.0302 1.0301 1.0299 1.0297 1.0295 1.0294 1.0292 1.0290 1.0288 1.0286 1.0284 1.0282
Salinity Calculators
Salinity, D and Conductivity
http://fermi.jhuapl.edu/denscalc.html
Salinity for Conductivity without D
http://gaea.es.flinders.edu.au/~mattom/Utilities/salcon.html
Salinity with D only
http://www.phys.ocean.dal.ca/~kelley/seawater/density.html
Hydrometer cal and Correction Temp Calcualtors and to include CO2 in seawater, plus others like WC
http://www.hamzasreef.com/Contents/Calculators/index.htm
Salinity and Sg cal. and temp correction
http://reefkeeping.com/issues/2004-07/rhf/conversion.htm
A full SG table for a 77F Hydro
http://reefkeeping.com/issues/2004-07/rhf/table1.pdf
And lots of Randy articles on Salinity, like 5 of them
Many people use these
On another subject, how is this future product for controlling Bryo going ?
So, have a nice day and glad you showed up