For sensitive biomaterials, medicines and laboratory samples that need to be colder than a standard freezer allows, the Gram BioPlus EF600W can be set anywhere from −35 to −5 °C. Gross volume is 600 litres, with 432 litres net. The interior is stainless steel with inner doors in acrylic (PMMA) behind a solid outer door.
Cooling is fan-assisted and defrost automatic, with the defrost water evaporated. The electronic Gram controller has a voltage-free contact, an E-sensor and offset, and the thermometer is digital. Audible and visual alarms warn of high or low temperature and an open door.
The cabinet uses 8.86 kWh a day, with 437 W of electrical power and a noise level of 55.3 dBA; refrigerant R290. The cabinet is rated for ambient temperatures of +10…+30 °C. External dimensions 837 × 756 × 1875 mm, net weight 146 kg, ATEX marking II 3G.