Price:
$811.00
SE
QIWEI DHC-3005-A Thermostatic Bath -30 ℃/0.1 ℃
-30~99.9℃5/6LInternal/external circulation

$845.00
SE
Qiwei DHC-3005-B Low Temperature Thermostat -30 ℃/0.01 ℃
-30~99.99℃5/6LInternal/external circulation

If you don't know how to choose "Thermostat", please consult customer service.