Sper Scientific - Model 800016 - Digital Humidity Temperature Monitor
Simultaneously monitors both temperature and humidity on an extra large 3-3/16 x 2½' dual display which can be read from across a room. Monitor humidity and temperature in labs, chemical storage areas, clean rooms, stock rooms, warehouses, factories, greenhouses, and outdoors. Recall min/max temperature and min/max humidity readings over any time period or have it automatically reset itself every 24 hours. Stand or wall mount. Comes with 1 AAA battery which lasts a full year. N.I.S.T. traceable certificate of compliance available.
Certificate of Compliance Traceable to N.I.S.T. (optional)
Specifies that the standards against which the product has been certified or calibrated were themselves calibrated by the National Institute of Standards and Technology (N.I.S.T.), or with N.I.S.T. calibrated equipment under conditions specified by N.I.S.T.