[n. of agent (after L. analogies) f. L. attemperāre: see above and -OR.] That which attempers; spec. in Brewing, an arrangement for regulating the temperature of the fermenting wort, and of the malting-rooms.
1854–7. Muspratt, Chem., I. 253/2. The mashing attemperator … can be so managed to preserve the heat at any temperature.
1876. Encycl. Brit. (ed. 9), IV. 275. The attemperator consists of a series of pipes fixed within the tun…. It should be possible to run hot or cold water through these pipes.
