10 Best Digital Psychrometer of 2022 – Review and Buying Guide

A digital psychrometer is a hygrometer. It measures relative humidity. However, the way they function is different. The psychrometer measures relative humidity with two thermometers, dry and moist. Analog, Sling, and Digital psychrometers are available. Today’s most prevalent are digital. It undoubtedly has more advantages. It’s more portable, easier to read, and more accurate.

Top 10 Digital Psychrometer: Editor Recommended

HVAC engineers, for example, use digital psychrometers. If you are an HVAC expert looking to buy a new one, we offer numerous alternatives for you on this page. Listed below are our top ten selections for the finest digital psychrometer. We cover them all, from entry-level to high-end. It’s like going from the cheapest to the priciest.

The 10 Best Digital Psychrometer Reviews:

Digital Psychrometer Thermo-Hygrometer with Backlight, ERAY Temperature and Humidity Gauge Meter Thermometer Hygrometer with Dew Point and Wet Bulb Temperature, 9V Battery Included

1. Digital Psychrometer Thermo-Hygrometer with Backlight

Features :

  • 2-IN-1: This digital psychrometer is designed to combine the functions of humidity meter, temperature meter, wet bulb temperature and dew point temperature. The dew point is a measure of how much water vapor actually in the air
  • BACKLIGHT LCD DISPLY: Unlike the others without backlight on the market, ERAY temperature and humidity gauge is equipped with a bulb light in the LCD screen, user can easy to read the measurements in the darkness
  • DUAL DISPLAY: Temperature range: -30 °C~60 °C (-22 °F~140 °F); Humidity range: 0~100%RH; Dew point temperature range: -50 °C~60 °C (-58 °F~140 °F); Wet bulb temperature range: -50 °C~60 °C (-58 °F~140 °F)
  • EASY TO USE: Unit switcher: °C and °F; Temperatue mode switcher: normal, dewpoint and wet bulb), Max Hold and Min Hold Function; Auto shutdown without operation after 12 minutes; 6F22 9V Battery included
  • WIDELY USED: Used for HVAC, industry, agriculture, meteorology, medical, daily life, building engineer, paranormal investigator, in wine cellar, machine room, data storeroom and etc. 12 months free replacement for the product quality problem

Additional Info :

Color Orange
Item Dimensions
Height 1.29921 Inches
Width 2.16535 Inches
Length 8.97636 Inches
Weight 0.3527396192 Pounds
Preciva Digital Psychrometer Thermo-Hygrometer, LCD Mini Temperature and Humidity Meter with Dew Point and Wet Bulb Temperature Hygrometer for Industry, Agriculture, Meteorology (9V Battery Included)

2. Preciva Digital Psychrometer Thermo-Hygrometer

Features :

  • This digital Humidity & Temperature Meter & Wet Bulb Temperature Dewpoint Temperature has been designed to combine the functions of humidity meter, temperature meter, wet bulb temperature and dewpoint temperature.
  • It is an ideal Humidity & Temperature Meter instrument with scores of practical applications for laboratory, industrial, engineer and professional.
  • Small form factor easy to use, with a white backlit dual display LCD screen can be used in a dark environment.
  • The humidity & temperature meter is for use a humidity/ semiconductor sensor.
  • Dual Display Temperature & Humidity; Resolution 0.01%RH, 0.01 °C/0.01 °F,Max Hold and Data Hold Function; Auto Power Off, Disable Sleep Mode.

Additional Info :

Color Thermo-Hygrometer
Item Dimensions
Height 2.2834645646 Inches
Width 1.3779527545 Inches
Length 6.8897637725 Inches
Weight 0.32 Pounds
Fieldpiece PRH2 Digital Psychomotor

3. Fieldpiece PRH2 Digital Psychomotor

Features :

  • Use for walk around testing or in-duct analysis
  • Clip it to your pocket just like a pen
  • Narrow tip for insertion into ductwork
  • Twist cap protects sensors when not in use
  • Bright backlight

Additional Info :

Item Dimensions
Height 2 Inches
Width 3 Inches
Length 0.09 Inches
Weight 1 Pounds
Release Date 2017-06-13T00:00:01Z
Fieldpiece SRH3 In-Duct Digital Psychrometer

4. Fieldpiece SRH3 In-Duct Digital Psychrometer

Features :

  • Measures temperature and percent rh
  • Calculates wet bulb and dew point
  • Slim 38 inch
  • Fast response time
  • Depth and direction indicators

Additional Info :

Item Dimensions
Height 11 Inches
Width 13 Inches
Length 4 Inches
Release Date 2017-06-13T00:00:01Z
Mengshen Digital Temperature and Humidity Meter - with Dew Point and Wet Bulb Temperature - Battery Included, M86

5. Mengshen Digital Temperature and Humidity Meter

Features :

  • 2 in 1 digital Humidity and Temperature Meter. Accurately measure any environments temperature, relative humidity (RH), dew point, wet bulb temperature,
  • One-step switch between °C and °F,
  • Device will power off automatically to save battery when not in use in several minutes,
  • Adjustable LCD backlight for clearly showing data,
  • Powered by 9V battery which is included. Please Attention: Now we use paper box packaging, the black bag shown in the picture is not included.

Additional Info :

Color Orange
Item Dimensions
Height 1.5748 Inches
Width 4.52755 Inches
Length 8.46455 Inches
Weight 0.02 Pounds
Lancoon Digital Psychrometer - Handheld Thermometer Hygrometer Temperature Humidity Meter with Dew Point/Wet Bulb Temperature for Indoor Outdoor, Home, Industry, Agriculture HVAC - Battery Included

6. Lancoon Digital Psychrometer – Handheld Thermometer

Features :

  • Multiple Function: Temperature & Humidity Dual Display, unit conversion, data storage, maximum and minimum value, backlight, low battery indicator and automatic shutdown.
  • Wide Range with Accurate Measuring: Humidity: 0 to 100% RH, Temperature: -20°C to 80 °C (-4°F to 176°F)
  • LCD Screen: Adjustable LCD backlight for clearly showing data, can display Temperature & Humidity at the same time.
  • Widely Application: can be widely used in HVAC, industrial, laboratory, wine cellar, greenhouse, warehouse, home and apartment.
  • Power Supply: Powered by one 9V battery (Included)

Additional Info :

Color M86: -4°f to 176°f(-20°c to 80 °c)
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

7. UEi DTH35 Digital HVAC Psychrometer Thermo-Hygrometer

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.

Additional Info :

Color Yellow
Item Dimensions
Height 9.37 Inches
Width 1.7 Inches
Length 0.72 Inches
Weight 0.0125 Pounds
OXV Thermo-Hygrometer Digital Temperature Humidity Meter, Professional Psychrometer with Dew Point and Wet Bulb Temperature Reader,Min/Max Value,Data Hold,Color LCD Display (Case Included)

8. OXV Thermo-Hygrometer Digital Temperature Humidity Meter

Features :

  • 【Multiple Functions】 OXV improved digital Thermo-Hygrometer / Wet Bulb Temperature Meter / Dewpoint Temperature Meter is designed to combine the functions of humidity reader, temperature gauge, wet bulb temperature and dew point temperature tester.
  • 【Color LCD Display】 Digital color LCD screen with backlight feature for easy use in darkness.
  • 【Dual Display RH and Temperature】Relative Humidity range: 0% ~ 100%RH. Temperature range: -20℃ (-4℉) ~ 70℃ (158℉). Dew Point Temperature: -20℃ (-4℉) ~ 70℃ (158℉). Wet Bulb Temperature:-20℃(-4℉) ~ 70℃(158℉).
  • 【Multiple Features】 With data retention, data storage, unit conversion, backlight, low battery indicator, automatic shutdown, maximum and minimum functions.
  • 【High Range of Applications】HVAC, industry, agriculture, meteorology, medical, daily life, building engineer, laboratory, engineering, paranormal investigator, wine cellar, machine room, data storeroom, greenhouse and etc.

Additional Info :

Mengshen Digital Psychrometer - Handheld Backlight Temperature Humidity Meter Gauge with Dew Point and Wet Bulb Temperature - Battery Included, M350

9. Mengshen Digital Psychrometer – Handheld Backlight Temperature Humidity Meter Gauge

Features :

  • 【Professional Digital Psychrometer】2 in 1 Humidity & Temperature Meter. Accurately measure environments temperature, relative humidity, dew point and wet bulb temperature.
  • 【Wide Measurement Range】Humidity: 0 to 100% RH; Temperature: -22°F to 212°F(-30°C to 100 °C)
  • 【Fast Response】Only 10s response time. It can display accurate temperature humidity value quickly. With backlight, you can get clearly readings even in the darkness.
  • 【Widely Application】This handheld digital psychrometer can be widely used in home, apartment, industrial, laboratory, greenhouse, warehouse and aquaculture.
  • 【Power Supply】9V battery included in the package.

Additional Info :

Item Dimensions
Height 2.3622 Inches
Width 5.70865 Inches
Length 11.811 Inches
Weight 0.7054792384 Pounds
General Tools EP8710 Calibratable Multi-Function Digital Psychrometer, Wet Bulb Capable with Probe, Grey

10. General Tools EP8710 Calibratable Multi-Function Digital Psychrometer

Features :

  • Measure temperature, relative humidity, dew point, wet bulb temperature and other moisture parameters; probe measures internal and surface temperature
  • Features a jumbo backlit display with triple readout; minimum and maximum temperature button and data hold button on device as well
  • This device is field calibratable using optional 33% and 75% salts; toggle between Fahrenheit or Celsius with switch
  • Monitor battery life with low battery indicator; psychomotor an Auto Power Off saving your battery when not in use ( can be disabled for calibration)
  • 9V battery included; limited 1-year

Additional Info :

Color Grey
Item Dimensions
Height 9 Inches
Width 3.75 Inches
Length 3 Inches
Weight 0.6 Pounds

Buying Guide: Things To Consider When Choosing Digital Psychrometer

Since water vapor, nitrogen, oxygen, carbon dioxide, and argon are all constituents of air, we may use the word “relative humidity” to represent the amount of moisture or water vapor present in the atmosphere. A lake or river’s water evaporates into the air, resulting in a gaseous form of water. The relative humidity ranges from 0% to 100% since it is stated as a percentage.

Digital Psychrometer

The air is extremely dry when the relative humidity is 0%. The absence of clouds in the sky is an illustration of this. Rain is not expected to fall today. As a result, when the relative humidity reaches 100%, the air is completely saturated with water vapor. There is a chance of rain if the soil becomes more moist. It’s known as the “dew point” when a person’s relative humidity hits 100%.

Relatively speaking, this implies it’s based on the temperature. The relative humidity of a volume of water at 40°F and 60°F is different, despite the fact that the volume of water is the same. As an example, when the temperature is 40°F, the RH is 100%. Even at 60°F, it can go as low as 80%.

Due to the fact that when it’s hotter, there is more moisture in the air. When it’s hotter outside, the air is more likely to have a higher concentration of moisture in it.

The following video may help illustrate relative humidity in a more visual way.

Relative humidity is critical in the maintenance and calibration of measuring instruments. Corrosion may be caused by it. As part of the calibration process for a certain measuring device, temperature and humidity are considered. Relative humidity of 50-60% is ideal for most people’s needs in daily life.

Sling Psychrometer

People used sling psychrometers before the rise of digital psychrometers. Dry bulb thermometer and wet bulb thermometer are both included. The dry bulb measures the temperature of the air, while the wet bulb measures the temperature created by the evaporation of the wet cloth.

Before taking the dry bulb and wet bulb temperatures, you must swing the two thermometers around for a few minutes. Depression refers to the difference between the two values. The dew point and relative humidity will be determined later on based on this depression figure.

When using an analog psychrometer, you can’t immediately read the measurement of the relative humidity since it isn’t possible. A chart of “Dry bulb temperature vs Depression for Relative Humidity” is needed to calculate the relative humidity value. You’ll need a graph showing “Dry bulb temperature vs depression for dew point” to figure out what the dew point temperature is.

A digital psychrometer, on the other hand, does not need reading a chart to show the relative humidity. You don’t have to worry about programming it; the microcontroller does it all for you. In addition, its sensor does not need a swing. A number of factors, such as ambient temperature, dew point temperature reading, RH, and so on may be shown on the display.

This equipment makes it simple to monitor the relative humidity in the ducts. Getting into the ductwork is unnecessary and time-consuming. In addition to this, the extension probe of a duct psychrometer allows you to take measurements without having to use your hands.


Digital psychrometers are difficult to choose from. The price of this instrument necessitates caution when purchasing one, since you don’t want to waste your money. As a final precaution, you should also avoid the unsuccessful one. We’ve compiled a list of the greatest psychrometers available right now in this article. Because of this, we focus on the digital type, which is easy to use and can be used for any occasion.

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