The compact and light-weight DLK 402 circulating cooler packs an array of advanced features in its small body. The universal cooler comes equipped with a low-noise, air-cooled, and low-maintenance refrigeration unit sealed airtight in a rigid polyurethane foam. It also boats a metallic (non-ferrous) heat exchanger variant to suit special requirements in laboratories. The neat console provided hosts a LED display for temperature control, a coolant-level indicator connector to a float switch, range of hose connections, a ¾ filler neck, vent valve, and limit alarms to indicate breach of parameter limits.