The DRB200 thermostat ideally complements the Hach reagents (COD, TOC, Test ‘N’ tube). Two separately controllable heating blocks enable cuvettes and reaction vessels to be digested at identical or different temperatures and time settings. The heating blocks heat from ambient to 150 degrees in less than 10 minutes. The DRB200 has a digital timer with an automatic switch-off and acoustic signal and the two transparent splash protection lids close the thermostat while it is heating. The integrated anti overheating feature and the insulated external shell provide additional safety. The reactor will emit an audible signal and automatically shut down at the end of the run. The reactors only support the 13mm diameter TNTplus vials and the 16 mm Hach chemistry vials.