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Temperature, Humidity and Dew Point Data Logger with LCD Display



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Quantity Price each
1-4 $208.04
5-9 $197.64
10-24 $193.48
25-49 $185.16
50-99 $180.99
100+ $176.83

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Lead Time (If not in stock): 5 weeks
Temperature, Humidity and Dew Point Data Logger with LCD Display OM-EL-USB-2-LCD OM-EL-USB-2-LCD
  • 0 to 100% RH Measurement Range
  • -35 to 80°C (-31 to 176°F) Temperature Measurement Range
  • Dew Point Indication via Windows® Control Software
  • USB Interface for Set-Up and Data Download

OM-EL-USB-2-LCD Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Additional Feature
Measurement Type
Number of Measurements
Input Type
Maximum Samples
Data Interface
Max Sampling Rate

The OM-EL-USB-2-LCD is a standalone data logger that measures and stores up to 16,379 relative humidity and 16,379 temperature readings over 0 to 100% RH and -35 to 80°C (-31 to 176°F) measurement ranges. The high contrast LCD can show a variety of temperature and humidity information.

At the touch of a button, the user can cycle between the current temperature and humidity, along with the maximum and minimum stored values for temperature and humidity. In addition, logging and alarm status is shown using two high intensity LEDs. The data logger is supplied with a long-life lithium battery, which can typically allow logging for up to 1 year.

The user can easily set up the data logger and download logged data by plugging the unit into a PCs USB port and using the supplied Windows software. Data logger parameters that can be set up include data logger name, °C or °F temperature units, logging rate (10 sec, 1 min, 5 min, 30 min, 1 hr, 6 hrs,
12 hrs), high and low alarms, immediate, delayed or push-to-start logging, display off, on for 30 seconds after button press, or permanently on, and data rollover (allows unlimited logging periods by overwriting the oldest data when the memory is full). Downloaded relative humidity, temperature and dew point data saved in text format can be graphed, printed and exported to other applications for further analysis.

-35 to 80°C (-31 to 176°F)
Repeatability: ±0.1°C (±0.2°F)
Resolution: 0.5°C (1.0°F)
Accuracy (OM-EL-USB-2-LCD); ±0.5°C (±1.0°F) typical; ±2.0°C (±4.0°F) max
Accuracy (OM-EL-USB-2-LCD-PLUS); ±0.3°C (±0.6°F) typical; ±1.5°C (±3.0°F) max

0 to 100% RH
Repeatability: ±0.1% RH (short term)
Resolution: 0.5% RH
Accuracy [20 to 80% RH] (OM-EL-USB-2-LCD); ±3.0% RH typical; ±5.0% RH max
Accuracy [20 to 80% RH] (OM-EL-USB-2-LCD-PLUS); ±2.0% RH typical; ±4.0% RH max

Accuracy (Overall Error in the Calculated Dew Point,
for RH Measurements Between 40 to 100 %RH @ 25°):
±1.1°C (±2°F)

16,379 temperature and 16,379 relative humidity readings
Logging Interval: 10 sec to 12 hrs
Software: Windows XP/Vista/7 and 8 (32-bit and 64-bit)
Operating Temperature Range: -35 to 80°C (-31 to 176°F); at temperatures below -20°C (-4°F)
the LCD display will exhibit slower response times of approx 10 seconds
Alarm Thresholds: High/low alarm thresholds for %RH and temperature selectable in software
Start Date/Time: Selectable in software
Status Indicators (LEDs): Red and green
Power: 1/2 AA, 3.6V lithium battery (included)
Battery Life: 1 year typical (depends on sample rate, ambient temperature and use of LCD display)
Weight: 40 g (1.4 oz)
Dimensions: See dimensional drawing on PDF
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Rated 4 out of 5 by from senior field service rep really great. nice and small and easy to use. the only issue is replacing the batteries. the tab to push down to separate the body is the weak point. this can break and then the 2 pieces will not stay together. a little tape is needed to keep the pieces together
Date published: 2018-09-22
Rated 5 out of 5 by from Works great. Data logger with great features. Incredibly flexible range of sampling rates and the software plots data for you. Paints a great picture. I am a homeowner with a humidity problem and this is a great tool to help understand the source. I have already recommended it to two HVAC professionals. Bob Schaale at Omega was very helpful by recommending the right product
Date published: 2017-12-20
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Are these data Loggers calibrated when received and how do you verify the calibration?

Asked by: KayCee
To order these units with a NIST certification you would order OM-EL-USB-2-LCD-NIST or OM-EL-USB-2-LCD-PLUS-NIST. To verify the units you would need a humidity / temperature chamber, unfortunately, we do not sell those. Please email us at if you need any further assistance. Thank you.
Answered by: Jane
Date published: 2022-05-10

hi can i get a standard operating procedure for this make model please?

Hello Sangeetha, If you navigate to product page and scroll down there is a link to download the manual:
Answered by: ENGRPV
Date published: 2022-05-10

I cannot use OM-EL-USB-2-LCD software EasyLog USB, version 7.5 on Windows 10. When I try to start or stop the software, it gives an error: Unhandled exception has occured..... InvalidArgument=Value of '1' is not valid for 'index'. Parameter name: inde

Asked by: karm
Thank you for your question. The issue you are having has to be reviewed by our Data Acquisition Dept. Please e-mail them directly-DAS@OMEGA.COM.
Answered by: Raptor
Date published: 2022-05-10

Is this compatible with a mac?  Is it possible to print charts ?

Asked by: Kevin R
The software requires Windows operating system 7 thru 10 it is not compatible with MAC operating system. The software is basic the best option is to export the data file to Excel and create graph from Excel.
Answered by: cwengineer3
Date published: 2022-05-10

Manual for OM-EL-USB-2. Is there one available? I only see one for OM-EL-USB-1 How would I change the battery?

Asked by: chuck74
Hi Chuck74, Thank you for the inquiry. Link to manual for this model; To access and change battery; - remove protective cover on the USB connector - the light grey body pulls apart from the dark grey body. You can press in detents lightly to help with removal. Best regards Omega
Answered by: NorwalkAE_RS
Date published: 2022-07-11

What are the conditions for the typical accuracies shown for standard and plus version?

Asked by: Randal
Thank you for your question. Please download the manual from the product page which will have all the information.
Answered by: ENGRPV
Date published: 2024-02-09

If data logging 4 to 8 hours per log event for say over a week or several weeks (assuming memory not full), is there a log "number" that would show on the device that could be written down to correspond to a particular log event?

Asked by: Randal
Thank you for your question. We will require more information to help on this question, please email the DAS team at DAS@OMEGA.COM
Answered by: Application Engineer PV
Date published: 2023-08-29

I have a bunch of these and the orings are either missing or dry rotted. Is it possible to order replacement orings from Omega?

Asked by: ciarraic
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