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由上海交通大学研制的WDH——40液氮制冷恒温降温箱,由上海市高教局主持于1985年5月14日通过技术鉴定。 WDH—40液氮制冷恒温降温箱是一种以液氮为制冷剂,由微机控制升温或降温速率的低温装置。它主要用于骨髓、血液、皮肤、精液、微生物等生物组织的冷处理与保存,高分子制品的低温试验,材料的低温冷冻处理,仪器仪表的低温性能测试与试验等,应用范围较
Developed by Shanghai Jiao Tong University WDH - 40 liquid nitrogen cooling constant temperature cooling box, chaired by the Shanghai Higher Education Bureau on May 14, 1985 passed the technical appraisal. WDH-40 liquid nitrogen cooling thermostat is a cooling liquid nitrogen as a refrigerant, controlled by the computer heating or cooling rate of low-temperature devices. It is mainly used in cold treatment and preservation of biological tissues such as bone marrow, blood, skin, semen and microorganism, low temperature test of polymer products, low temperature freezing treatment of materials, low temperature performance test and test of instrumentation, etc.