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Thermo Hygrometer (RT817E)


5-up: $29.00 ea.

  • Large digit display for humidity and temperature
  • Max/Min memory
  • Ice point alert
  • Outdoor temperature display
  • °C/°F switchable
  • Foldaway stand
  • Mounting keyhole

Perfect for home, office, and factory, our new RT817E displays indoor and outdoor temperature as well as indoor humidity. Each unit ships with an external temperature sensor with 10 feet of cable to measure temperature in a remote location.

  • Mount your new RT817E on the wall or on the desk with its convenient wall mount or fold-out stand. With large 1 inch digits you'll have no trouble reading the current display.

    The RT817E records Min and Max temperatures as well as an ice point alarm for use with the remote probe. Set the alarm to ON and you'll be alerted when the outside temperature drops below 32°F (0°C).

    Each unit includes a AAA 1.5V battery, wall bracket, remote sensor, and operating instructions. The RT817E is a professional tool at an affordable price.

  • Range20 to 99% RH

    Indoor: 32 to 122°F (0 to 50°C)

    Outdoor: -58 to 158°F (-50 to 70°C)
    Accuracy±3% RH at 77°F (25°C)

    ±2°F (1°C)
    Resolution1%; 0.1°
    Display Update10 seconds
    Ice Point AlertOutdoor reading 32°F (0°C)
    Display1" digits

    3.1 H x 2.6 W inches

    (79 H x 66 W mm)
    Sensor Wire Length9.8 feet (3m)
    BatteryType AAA, 1.5 volts x 1 piece
    Dimensions4.3 H x 3.9 W x 0.8 D inches

    (110 H x 98 W x 21 D mm)

Ratings & Reviews

4.0 / 5.0
4 Reviews
5 Stars
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1 Stars
We're addicted to this
I keep one of these on my dresser and have owned it for a couple of years now. It's important to me that my house doesn't become too humid or the opposite. We cook a lot and sometimes in the cold months, the humidity will spike which causes windows to sweat and so on. If I see the humidity level go up past 50% I'll turn on the dehumidifier and if it gets too low I have a little humidifier I use. I asked my wife the other day if she ever looks at it and she said she does every time she walks into the room. It's addicting. It runs on a AA battery. I own three Thermoworks items (Thermopen and Chef Alarm) and love them all. Buy with confidence.
May 5, 2016
Love this
I love to make molded chocolates. I had a batch of chocolate I was tempering seize up because of the humidity, So, I treated myself to this Thermo Hygrometer. Now I check the humidity before tempering chocolate. It is so nice to know the room temperature and the humidity (especially here in Florida)
April 30, 2017
Can't beat the RT817E
We have two of these, one in the living room and the other in the bedroom. We use them both every day and love them.
September 18, 2017

1 month ago
ran several salt tests; it is not at all accurate.
August 21, 2017

2 months ago