 | MARINE HYDROMETERS Ref: 795
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| |  | Tetratec Comfort Hydrometer Ref: 1087
Measures Salinity & Specific GravityExtremely accurate and easy to use swing needle hydrometer.Provides temperature corrected readings in water that is in the temperature range of 20-29 deg CEnsure there are no air bubbles attached to the swing arm needle before taking the reading, and wash out with fresh clean water after useReads : Salinity (ppt) 0 - 40. : S.G. 1.000 - 1.032Marine fish and corals require stable water conditions, which makes regular checking of salinity important. It’s also necessary to check salinity when making up new water for water changes.The TetraTec Hydrometer makes it simple to accurately check the salt content of water, giving precise readings over a wide temperature range (20 – 29°C). It works by measuring the specific gravity (relative density) of the water, and converting this to salinity.All you need to do is fill up the hydrometer with water, and read the value off the scale printed on the side.
£9.24
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 | Aquavital chamber hydrometers Ref: 792
RRP £9.99 ourprice £7.49 Swing Needle HydrometerEasy Dip and Read Hydrometer with swing needle.Measures :Salinity (ppt) 0 - 40 ppt (at 25 deg C)Specific Gravity 1.000 - 1.030 (with optimum marine tropical range 1.020-1.023 highlighted) (at 25 deg C)Rinse with fresh water after use as dried salt on swing needle may effect subsequent readings.
£7.99
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| |  | AQUAMEDIC REFRACTOMETER Ref: 176
The refractometer is an precision optical instrument used to determine the salt concentration in salt water aquariums.Its exact value can be determined in seconds and can be read either as absolute salt concentration (°/°°,ppt) or as specific density (kg/l). When a beam of light enters the b>refractometer it is bent or refracted by the water in the test panel. This refraction is proportional to the salinity of the sample and can be directly read by viewing the internal scale. As salinity varies in inverse proportion to temperature our refractometer is fully temperature compensated.The strong plastic carrying case contains the refractometer, a pipette for the water sample, a screw driver for calibration and full instructions.Technical Dataspecific density 1.000 – 1.070 salt concentration 0 – 100 °/°° Accuracy 0,001 /1 °/°° temperature compensation 10 – 30 °C Temperature compensated Refractometer for the determination of the salinity
£39.99
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