The MTST GDX-20/30 is a combined heating and cooling temperature circulator that pairs a low-temperature cooling pump with a high-temperature oil bath in a single unit. It operates across a wide temperature range of -30 to 199°C with a 20 L circulation capacity.

The system uses a sealed, closed liquid circuit with a separate expansion vessel that is mechanically connected but isolated from the circulating medium. This design keeps the expansion vessel medium below 60°C and prevents water vapor or oil mist from being drawn into the loop at temperature extremes.

It is intended for laboratories in research, chemical, biochemical, and medical settings that require stable temperature control of a circulated heat-transfer fluid.

How It Works

A single heating and cooling container provides a large heat-exchange area, allowing the circulated heat-transfer oil to be heated or cooled and pumped through a closed loop. The circulating pump delivers up to 25 L/min with a 6 m lift, while the expansion vessel accommodates fluid volume changes without participating in the active circulation.

Key Features

• Operating temperature range of -30 to 199°C in a single integrated unit
• 20 L circulation capacity with a sealed, closed-loop fluid system
• Cooling capacity of 550 to 3460 W and 3000 W heating power
• Circulating pump rated 100 W, delivering 25 L/min flow with 6 m lift
• Separate expansion vessel isolated from the circulation, kept below 60°C
• Uses CFC- and HCFC-free refrigerants
• Safety features including self-diagnosis, compressor overload protection, high-pressure switch, overload relay, and thermal protection

Applications