Holmes Digital Thermometer and Hygrometer

Brand Holmes Model HHG300 Listprice $12.99 Price $.

Displays indoor - outdoor temperature / Shows current room humidity level / 12/24 hour digital clock / Easel back stand or mounts to wall / Includes 1 AAA ....read more

3 Responses to “Holmes Digital Thermometer and Hygrometer”

1. N. Mooney says:

   January 3, 2010 at 12:00 am

   Great indoor/outdoor thermometer!
   Rating:5 out of 5 stars
   Loved this indoor/outdoor thermometer. It works very well! And it’s attractive. And it was a great price too!
2. Reader says:

   January 21, 2010 at 12:00 am

   Not recommended, due to temperature inaccuracies, and a complete failure of the relative humitity readout.
   Rating:3 out of 5 stars
   This unit provides both temperature and relative humidity readouts. You can check both inside and outside temperatures in either Fahrenheit of Celsius. The outside temperature is provided to the display through a wire attached sensor. I located the display near a window and ran the wire under the lower sash and over the exterior sill, so that it was not necessary to drill any holes.

   The indoor and outdoor temperature sensors are accurate (relative to each other) within an error of about 2 degrees Fahrenheit. This was determined by leaving a unit inside for a day, and noting both indoor and outdoor sensor readings, with both sensors indoors measuring the same ambient temperature. The difference between them was about two degrees.

   The relative humidity readout of one unit, of the two I purchased on sale, has stayed permanently stuck at 20% and is, thus, of no value. The second unit’s hygrometer, although not frozen, is inaccurate. I use the unit with the most accurate temperature readouts for indoor and outdoor temperature readings, which are usually within two degrees of other thermometers around the house.

   The main goal motivating these purchases was to get reasonably accurate relative humidity readings. Owing to the failure of the two units I purchased to provide adequate humidity readings, and their temperature inaccuracies, the Holmes Digital Thermometer and Hygrometer is not recommended.
3. Sanjay Sheth says:

   February 17, 2010 at 12:00 am

   Good but the remote temp sensor is nearly useless
   Rating:4 out of 5 stars
   The basic thermometer/hygrometer part is very good. However, the remote sensor is nearly useless as it is connected by a cable to the display. They tell you to bore a hole in the wall to take the sensor outside but the cable cannot be detached which means the hole would have to big enough to fit the whole sensor through. Anyways, who wants to make a hole in the wall to the outside .. hot/cold air would be rushing in through it.