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An enzymatic time/temperature device for monitoring the handling of perishable commodities.

Kockums Chemical AB, Malmö, Sweden, has developed a biochemical indicator, the i-point TTM (Time-Temperature Monitor). The indicator responds to temperature in much the same way as perishable commodities in which loss of quality is directly related to the combined effects of the degree and the duration of storage temperature. Primary application of such indicators are expected for frozen, refrigerated and fresh food products. The device can be useful in monitoring the handling of various temperature sensitive noon-food products as well. Reacting at a relatively low rate under optimum temperture conditions and at accelerated rates as temperature rises, the indicator chemically integrates and accumulates both the length and degree of all temperature experiences. When pre-selected time-temperature limits have been exceeded a distinct irreversible color change will occur, indicating that action is required--the particular depending upon the use being made of the commodity.