Laboratory upright freezer with natural air circulation.Heavy-duty refrigeration system, maintenance free, between –55 °C to –80°C cascade connection, with industrial grade hermetically sealed refrigeration compressors and reliable cascade refrigeration ton minimize noise and vibration, aircooled. Operating panel with microprocessor driven temperature controler and digital display (LED). Includes optical and acoustical alarm device with independent circuit and floating contact for connection to an alarm system on the premises. 10mV/K terminal for connection to our temperature recorder. Exterior case with stainless steel covering, lateral parts white, sheet steel. Two doors (inside and outside), front door lockable. Door stop on left. Interior made of stainless steel without mounted equipment, making it especially hygienic and easy to clean.