Amprobe TH-3 Relative Humidity Temperature Meter

(4 customer reviews)

  • Dual display
  • Relative function monitors humidity and temperature changes
  • Extended probe stem to easily access air ducts
  • Min/Max readings
  • Data Hold
  • Capacitive sensor with protective cover
  • Auto power off
SKU: 3027060 Category:


The Amprobe TH-3 Relative Humidity and Temperature Meter uses a precision capacitance sensor to deliver accurate performance with long term stability. This high accuracy instrument measures the full range of relative humidity from 0% to 100% and features an exceptionally wide ambient temperature measurement range from -4 °F to 140 °F. The sensor is mounted on along shaft extending from the top surface of the unit, making probing into duct work and hard to reach areas more easy.

The large LCD displays two measurements simultaneously with a full range of display options including hold, min, max, and relative. The TH-3 is a complete package and comes with soft carrying case, sensor cover, battery and manual.


Display Dual display
Operating conditions 0 °C to 40 °C
Storage conditions -10 °C to 60 °C; <70 % RH
Altitude Up to 2000 meters
Sample rate 2.5 times per second
Battery 9 V Battery, NEDA 1604 or JIS 006P or IEC6F22



TH-3 Relative Humidity and Temperature Meter

Measure the full range of relative humidity from 0 to 100% with the TH-3 Relative Humidity Temperature Meter.

What’s Included

  • TH-3
  • Carrying case
  • Batteries (installed)


Datasheet »
Product Manual »

4 reviews for Amprobe TH-3 Relative Humidity Temperature Meter

  1. lucky1331ykcul

    Outstanding Functions!

    I have had the TH-3 for some time, I love it. It makes reading RH quick and easy. Don’t waste your time with others, get this one, you won’t be disappointed.

    ✔ Yes, I recommend this product.

  2. Horizon1

    Must have in your toolbox!

    This is the most used tool I now own. It takes a lot of the confusion out of superheat and sub-cooling requirements.
    Everyone should have one.

    ✔ Yes, I recommend this product.

  3. AndersonAirChris

    Very fast and accurate

    I used to use the humidity head for my Fieldpeice meter but after some time it became rather inaccurate and sluggish. Ever since I switched to the meter I have never had a problem. Refresh rate is awesome and it works every time. I would def recommend this to a friend or co-worker.

    ✔ Yes, I recommend this product.

  4. OldSchoolOne


    Wow. After fumbling with analog probes and cords and accessories for over two decades, the TH-3 is my new MUST HAVE tool. Just walk into a room or next to a cooling tower, press a button, and receive instant accurate ambient information! Nothing is better suited for use by a Plant Operator in the Healthcare field weather I’m running cooling towers or providing patient comfort, this is the best tool for the task.

    ✔ Yes, I recommend this product.

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