Fish is generally stored and transported in ice, and, under these conditions species from artic or temperate waters will reach the unfit state within about two weeks. Tropical fish can be held somewhat longer. Spoilage is much faster if the fish is not held at chill temperatures. It is therefore important for anyone concerned with quality of fish to be able to measure its freshness i.e. the amount of deterioration that has occurred since it was caught.
Thus, a requirement for a rapid and objective method for measuring fish freshness in a wide range of conditions. The method should be capable of being carried out by untrained persons and should be non-destructive in use. Preferably it should also be capable of grading batches, with the minimum of computation and record keeping.
The Distell Fish Freshness Meter, or Torrymeter, has been developed to meet these requirements.
This latest model of the Fish Freshness Meteris compact, robust, fully portable and suitable for any normal application within fish processing industry markets, processing factories or quality control laboratories. It provides rapid measurements and is simple to use. The freshness of the fish is indicated on the LCD display.
The meter can be set to measure from 1 – 16 fish. The menu driven software can sum the readings of sixteen fish samples and then display their average value. The meter is most accurate in this mode.
Generally the measurements can be taken without disturbing the fish in their containers, and the testing does not damage or mark the samples in any way.