Economical way to monitor indoor and outdoor temperature and humidity
Wireless sensor has transmission range of up to 100 feet
Measures temperatures to as low as minus 38 degrees Fahrenheit and up to 158 degrees Fahrenheit
Display features one-inch tall digital numbers
Measures 4.33 x 4.86 x 1.08 inches (WxHxD)
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.)

eCompressedair's model RH1-02 relative humidity indicator lets you know when there is moisture in your system. Indicating desiccant starts changing color from blue to clear at 10% RH and is clear at 15% RH. The indicating desiccant will change back to blue once you start passing dry air through it. Stainless steel screens at each end. 1/4 NPT female brass threads on each end for secure worry free connection. 100% satisfaction guaranteed. If for any reason you are not satisfied simply return the RHI-01 Relative Humidity Indicator or for a full refund. Alerts painter when humidity enters air line. Indicating beads begin to change from blue to pinkish clear at 10% humidity and are completely pinkish clear at 15% humidity. Can change color numerous times before requiring replacement of unit. Ideal for use with DS20 Desiccant Snake.