| 摘要 |
<p>Temp. and soln. concn. controller for a blacking bath comprises a thermocouple dipping into the bath which via a control circuit is connected with a switch for the water feed into the tank, the bath temp. and its concn. being maintained by control of the water addn. rate to the bath. The bath is pref. run at the boiling pt. of the soln. make-up of water thus controls the bath temp. The equipment automatically maintains constant bath condition and thus ensures uniform performance by the soln.</p> |
