This review is for the Fisher Scientific Traceable Refrigerator/Freezer Alarm Thermometer, Single range: -40° to +50°.
I work in a medical office where we have separate a refrigerator and freezer for storing vaccines. For this purpose, the temperature has to be kept in a narrow range.
I bought one for each of them. Previously, we were using mercury thermometers and had to open the freezer and refrigerator to check the temperatures, which we did twice per day. They came with a vial of liquid which the temperature probe was already set up in -- no assembly needed by me. They also came with an AA battery.
With these Fishers, we don't have to open the doors to check the temperatures which is faster, more convenient as we don't have to look at or touch the cold thermometers and minimizes the temperature fluctuations due to warm air rushing in.
The Fishers came with calibration certificates so we are reasonably confident of their accuracy. We also noticed the old thermometers were off by up to 10°F. This was alarming and made me glad we got the Fishers.
These Fishers can also have an alarm set if the temperature goes below and/or above a certain temperature.
They also keep track of the lowest and highest temperatures attained during a time period.
Overall, they seem accurate, set up was easy, and ongoing use was easy.