Honeywell TM005X Wireless Indoor/Outdoor Thermo-Hygrometer Review

Average Reviews:

(More customer reviews)I was most interested in the humidity measurement. I conducted a calibration****(See update at end of review) with a sling psychrometer. A sling psychrometer measures wet bulb/dry bulb temperature and is the least expensive (albeit a bit tedious to use) and most accurate way to determine relative humidity (RH). I needed to know relative humidity for curiosity indoors and for a chamber in my basement used to dry cure sausage (I needed a 70%RH environment). The Honeywell unit was spot on with the sling psychrometer (and temp. was accurate as well). The unit is new; I need to check it over time for accuracy. However, it's running very well so far and the price is right. I'll be buying more remote sensors [...] I found the remote sensor part no. is TS33C, can find them on Amazon with that search). The majority of complaints say the humidity is "off." However, I didn't see a single valid calibration conducted. Update 01-March-2009 I just took the main unit, the sensor and sling psychrometer. The conditions in my home at time of testing were 68F and 30% relative humidity. Main unit read 68.4F/30% RH The Sensor: 68.0F/30% RH Sling Psychrometer: 68F/31% RH The sling psychrometer consists of two sealed thermometers and will never need a calibration, it is an accurate standard. This Honeywell Unit is pretty darn good. Update 13-Dec-2009 Someone contacted me and corrected a big point. I did not calibrate the unit by adjusting it to a known standard, I simply compared the values. My apologies for this rather serious error.

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Product Description:
The Honeywell TM005X Wireless Thermo-Hygrometer is an easy-to-read and economical way to track temperature and humidity in your home or office. Featuring a jumbo display unit with one-inch tall digital numbers, this sleek silver and black unit can monitor up to three remote locations. The TM005X comes with one remote sensor, but two additional sensors can be purchased separately and added.With the main display unit measuring 4.33 x 4.86 x 1.08 inches (WxHxD), and a display that includes comfort and trend indicators, you can place the TM005X on your desktop or hang it from a wall. With the remote sensor, you can track the temperatures of pools, hot tubs, spas, ponds, soil, and much more. The remote sensor has a transmission range of up to 100 feet. With the sensor powered by two AA lithium batteries, the unit has an outdoor temperature range of minus 38 to 158 degrees Fahrenheit, and when the sensor is powered by two AA alkaline batteries, the range is minus 4 to 158 degrees Fahrenheit. (The two AA batteries required for the sensor, and the two AA batteries required for the main unit, are not included.)

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