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UEi Test Instruments

UEi DTH35 Digital HVAC Psychrometer Thermo-Hygrometer, Portable Relative Humidity Meter, Handheld Electronic in-Duct Thermometer, Measures Wet Bulb Dry Bulb Dew Point Temperature Humidity

    • Based on 270 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Nov 27
Order within 4 hours and 10 minutes
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Features

  • 5 MEASUREMENTS: The DTH35 measures Wet bulb, Dew Point, Enthalpy, Temperature, Relative Humidity. There are Data Hold and Min/Max functions to monitor fluctuations in readings.
  • BACKLIGHT: Our Psychrometer comes with a backlit dual display to help readability in dark environments. The dual display allows you to read temperature and humidity at the same time.
  • HANDS FREE: The DTH35 has a magnetic mount allowing handsfree usage. There is a screw on plastic cover to protect the sensor when not in use. The cover doubles as an extension handle to reach further.
  • BROAD APPLICATION: Our psychrometer was designed specifically for HVAC Ductwork, but also works effectively in Greenhouses, Laboratories, Freezers, Kitchens, Offices, Computer labs, and many other environments.
  • 1-YEAR WARRANTY: The DTH35 comes with a 1-Year limited warranty. All warranties must be redeemed in the US.

Description

The DTH35 Digital Psychrometer measures temperature, relative humidity, and calculates wet bulb, dew point, and enthalpy of moist air (air with humidity). The housing design is useful for in-duct measurement, as well as ambient or vent outlet applications. A large, easy to read display, and built in magnet improves ease of use. Specifications • Temperature Range: -4 to 122°F (-20 to 50°C) • RH% Range: 0 to 99.9% RH% • Wet Bulb: 5 to 121.8°F (-15 to 49.9°C) • Dew Point: -4 to 121.8°F (-20 to 49.9°C) • Enthalpy 0 to 125 BTU/Lb (0 to 292 KJ/KG).UEi Test Instruments has over 50 years’ experience designing and manufacturing a broad range of award-winning, industry-leading Test and Measurement Tools. Professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. UEi backs its products with dedicated technical support, service and repair teams.

Brand: UEi Test Instruments


Product Dimensions: 1.7"W x 9.37"H


Item Weight: 0.2 Ounces


Mounting Type: Tabletop


Operating Humidity: 10-90%


Brand: ‎UEi Test Instruments


Product Dimensions: ‎1.7"W x 9.37"H


Item Weight: ‎0.2 Ounces


Mounting Type: ‎Tabletop


Operating Humidity: ‎10-90%


Upper Temperature Rating: ‎122 Degrees Fahrenheit


Manufacturer: ‎UEi Test Instruments


UPC: ‎053533506938


Global Trade Identification Number: ‎38


Part Number: ‎DTH35


Item Weight: ‎0.2 ounces


Item model number: ‎DTH35


Batteries: ‎2 Lithium Metal batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Style: ‎Digital Psychrometer (DTH35)


Material: ‎other


Power Source: ‎Battery Powered


Item Package Quantity: ‎1


Included Components: ‎Batteries, DTH35


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Warranty Description: ‎1-Year limited warranty


Date First Available: July 17, 2014


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • I think this is a good one!
I'm starting HVAC and needed a psychrometer. The price on this was great. Didn't have a ton of faith in it because of the low price and country of origin. The plastic lens over the display isn't very strong and the tip seems delicate. It would be easy to snap this in two. I plan to transport all my test equipment in a padded case from harbor freight. They have inexpensive foam cases that can be custom made to carry your stuff. I think I got a good meter. It's within .2 of one degree from my UEI PDT650 pocket thermometer. I can recommend this, too. Great price and good enough to start my new career. ... show more
Reviewed in the United States on July 5, 2022 by Lar Bear
    • A professional tool for a professional job !
It’s accurate, well sized, has a clear display & gives the enthalpy besides dry bulb and wet bulb temps. It’s appearance is also very professional. I use it very much for my HVAC work.
Reviewed in the United States on December 30, 2019 by monant
    • Great
Love it
Reviewed in the United States on July 9, 2024 by Shayfer
    • Fast, Accurate, Useful
This is a great little wet bulb psychrometer. I took away 1 star as it arrived with a dead battery. Once I installed a new battery (CR2032) it worked perfectly and has been a big help in superheat calculation, humidity measurements, etc. It is the fastest responding unit I have ever used, and is accurate within 2% points compared to known calibrated instruments on the humidity measurements and within 1.5 degrees on temperature measurement on dry bulb and 2 degrees on wet bulb measurements. It has a large, easy to read, blue back-lit LCD display, which is nice in dimly lit basements, crawlspaces, or attics. The magnet on the back is plenty strong enough to hold the unit in place in a duct, even with high velocity air moving through it. I also like that the bulb cover screws onto the nipple on the back to provide a nice handle to hold the unit. A very useful measurement tool. ... show more
Reviewed in the United States on January 3, 2016 by Ryan P.
    • Got this to be like Steve Lav!
Great instrument for measuring humidity, temp, dew point and wet bulb. A must for every hvac tech (and a dentist like me on occasion) great, accurate tool gives precise readings at a great price
Reviewed in the United States on August 27, 2019 by Richard S.
    • Great tool!
This tool has made me money everytime I've used it. That says it all for me. 💯
Reviewed in the United States on October 19, 2022 by Aaron F.
    • Uei
A definite must have tool especially during the cooling season to check for humidity issues. Also if you don’t have digital gauges, it’s excellent for superheat calculations
Reviewed in the United States on March 31, 2021 by AcTim
    • I was pretty disappointed with this piece of equipment especially since I ...
I was pretty disappointed with this piece of equipment especially since I saw it recommended by another website. The probe end that is supposed to go into whatever you are taking the temperature of/moisture level of has holes in it that allow for pieces of stuff to get lodged inside & then you have to dig them out. This is also the spot where the sensors are, so you have to be careful getting the crumbs out so you don't damage the sensors. The first time I used it, the end of the probe came out disfigured like it had melted from the temperature level. I was only temping some boiled newspaper shreds for vermicomposting, so it shouldn't have been over 212*F. It actually should have been under 212*F since I had already removed the paper from the boiling water earlier. When I test any moisture level of anything, it shoots up to 100% making me wonder if it is ever really accurate outside of simply testing the humidity in the air. Considering the cost of this item, I would expect it to be manufactured a little better. Also, I am left-handed & you have to use it with your right hand, otherwise it's readings are upside down. This isn't a huge deal, but it causes it to be very awkward when you're trying to take a reading of something you are trying to hold, etc. I searched for hours for a moisture meter for a decent price that had good reviews. Side note: I also bought a cheap little moisture meter for less than $3 that worked just as well, but the packaging was just a little bubble wrap envelope & it came from China, so during shipping the screen broke. It worked just as well as this $70-$80 meter, even with the screen cracked & the company even refunded my money. I used it for several months until it finally got stuck on 80% humidity. So this UEi piece of equipment was, in my opinion, poorly designed & overpriced. The only nice features I know of is that it has a magnet on the back of it & it has a cover for the probe. ... show more
Reviewed in the United States on December 7, 2017 by Amazon Customer

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