Designed for use in aquariums and seafood holding systems, both are standardized at 75F (24C).
The Standard model has a salinity range of 1.000 to 1.060, with a thermometer that measures from 10 to 40ºC and 15 to 105ºF. It is 8" long and has a body diameter of 15 mm.
The Professional model has a salinity range of 1.000 to 1.060 and features a built-in thermometer that measures from 0 to 40ºC and 30 to 105ºF. It is 12" long and has a body diameter of .81". Weighs 1 lb.
Note: Graduated cylinder not included. For HYD6, use GC100 or LGC100. For HYD7, use GC500 or LGC500.
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