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Portable USB Thermocouple/Voltage Input Data Acquisition Module

Portable USB thermocouple/voltage input data acquisitionmodule


Item# OM-DAQ-USB-2401

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $973.59
5-9 $924.91
10-24 $905.44
25-49 $866.50
50-99 $847.02
100+ $827.55

In stock

Lead Time (If not in stock): 36 weeks
Portable USB thermocouple/voltage input data acquisitionmodule OM-DAQ-USB-2401 OM-DAQ-USB-2401
  • 8 Differential or 16 Single- Ended Analog Inputs
  • 24 Bit Resolution with Up to 1000 Samples/Sec
  • User Programmable for Type J, K, T, E, R, S, B, N Thermocouple or Voltage Input
  • Free Windows Software Suite Available for Download from OMEGA - DAQ Central Menu Driven Windows Software and Also .NET API/Driver for Visual Basic, C#, and Visual C++ for Windows XP, Vista and Windows 7

OM-DAQ-USB-2401 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.

Analog Input Type
Analog Input Class
Number of Analog Inputs
Maximum Sample Rate (per sec)
Analog Input Resolution
Input Range
Interface Protocol
Additional Features

USB Connection
The OM-DAQ-USB-2401 is a portable USB 2.0 full speed thermocouple/voltage input data acquisition module (fully compatible with both USB 1.1 and USB 2.0 ports) that can be used with either desktop or laptop PCs. This stand-alone module draws power from the USB port to operate and has 500V isolation to PC. An external power supply (optional) can be used. The compact, modular packaging ensures ease of use in a variety of applications. Units can be DIN rail or wall mounted with the included hardware or easily operated on a bench.

Software Configurable Channels
All configurable options (including individual channel input type and range) are software programmable. The OM-DAQ-USB-2401 is user programmable for thermocouple types J/K/T/E/R/S/B/N and voltage input ranges from ±30 mV to ±10V full scale.

Resolution and Speed
Even with it's high 24-bit resolution, all analog input channels can be measured sequentially at about 1 ms per channel. A total of 1000 samples per second can be taken, divided across all active channels.*

Free Windows Software Suite

OMEGA™ DAQ Central Software Data Displays
A free Windows Software Suite that includes the DAQ Central menu driven Windows software is available for download from OMEGA. DAQ Central allows charting, data logging, file storage and virtual instrument viewing (digital meters, dial meters, bar graphs) of data in real time. No programming is required - simply point, click, and drag desired display options to create a virtual display screen. Additionally, for those users who would like to design and develop their own custom application program, the software suite includes a .NET driver for C#, Visual Basic and Visual C++.
DAQ Central will run in demo mode allowing you to preview all the different functions in the software. Click on the Software button above to download the DAQ Central software and take a test drive!


Isolation: 500V from PC
External Excitation Output Voltage: 12 Vdc regulated, max total current output 67 mA
Power Requirements: Powered direct from USB port, max 500 mA, or from external 7.5 to 12 Vdc
Environmental: 0 to 50°C (0 to 122°F) 95% RH (non-condensing)
Operating Temperature: 0 to 50°C (32 to 122°F), 0 to 95% RH non-condensing
Storage Temperature: -40 to 85°C (-40 to 185°F)
Weight: 0.23 kg (0.5 lb)
Dimensions: 107 W x 128 L x 39 mm H (4.2 x 5.1 x 1.5")
Input Voltage Range: Software programmable on a per-channel basis differential/single-ended
  -10 to 10V  -500 to 500 mV
  -5 to 5V  -250 to 250 mV
  -2.5 to 2.5V   -125 to 125 mV
  -2 to 2V  -75 to 75 mV
  -1 to 1V  -30 to 30 mV
TC Input Range
    Type J: -18 to 1200°C (0 to 2192°F)
    Type K: -129 to 1372°C (-200 to 2502°F)
    Type T: -101 to 400°C (-150 to 752°F)
    Type E: -184 to 1000°C (-300 to 1832°F)
    Type R: 204 to 1768°C (400 to 3214°F)
    Type S: 204 to 1768°C (400 to 3214°F)
    Type B: 538 to 1820°C (1000 to 3308°F)
    Type N: -129 to 1300°C (-200 to 2372°F)
TC Input
Thermocouple Accuracy: In very slow mode, 24 bit resolution
  J = ±1.1°C
  K = ±1.2°C
  T = ±1.1°C
  E = ±1.0°C
  R = ±2.5°C
  S = ±2.6°C
  B = ±3.3°C
  N = ±1.5°C 
Cold Junction Compensation Accuracy: ±1.0°C
Analog Input Accuracy:
Differential Input: In very slow mode, 0.015% of reading +0.004% of range +10uV (exclusive of noise)
Single-End Input: In very slow mode, 0.05% of reading +0.01% of range +50uV (exclusive of noise)
USB Device Type: USB 2.0 (full-speed)
Device Compatibility: USB 1.1, USB 2.0
Power Supply: From USB or 9 Vdc universal adaptor (included)
DIN Rail Mounted for Rack Application: Optional
Open Thermocouple Detect: Automatically enable when a channel is configured for a thermocouple sensor
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Rated 2 out of 5 by from Adequate but fragile Basic device does provide USB connection to computer. Software is basic and cumbersome. The device is not robust, recommend unplugging power and USB when not in use.
Date published: 2018-08-06
Rated 2 out of 5 by from OM-DAQ-USB-2400 - Beware when using w/ TCs I purchased four of these units (over time) for use with various thermal experiments involving building assemblies (temperature ranged from 0 to 100F). With 8 differential channels on each unit, this model seemed like a bargain and I've always looked to Omega for easy online shopping and competitive prices. When I started pairing these units together, I noticed pretty significant disagreements between TC readings when calibrating multiple devices at once. This disagreement wasn't resolved with offsets and scaling. I thought my devices needed calibrated, but digging deeper in the specs, I found the combined TC and cold junction compensation error for these units are +/-4F...not good for measurements requiring minimal absolute error, and worse than some of my old Omega handheld loggers. It would have been nice for the specs to provide the total measurement error, with CJC and TC errors together, as other products usually list them. Using this model for analog voltage signal logging has worked well, on the other hand, and the software is simple and easy to use. I'm upgrading to a DAQ-2416 to get better accuracy and I hope I can get more out of this unit even though the $$ per TC channel isn't that different from the USB-2400.
Date published: 2016-12-19
Rated 1 out of 5 by from Did not live up to expectations. The OM-DAQ-USB-2401 was acquired for the purpose of running 5 to 8 load cells. It was recommended specifically for the job, by an Omega support engineer on the phone support line. When received, we found that the label on the top, identifying the ports, was 180 degrees off. We also found that the unit is very restricted with regards to excitation current! It is only capable of feeding 2 load cells, not 8. Very disappointing.
Date published: 2016-11-17
Rated 3 out of 5 by from Calibration issues Calibration Cert not offered but when we tried to calibrate the unit as required for our use, it failed. Had to return the unit for Omega to review because they said it was factory calibrated. If that's the case, then why would a cert not be offered? Frustrating.
Date published: 2022-03-09
Rated 3 out of 5 by from device works but software is limited For my job, I need to connect this device to others in my network, and we only use Linux Systems. Is there some way to config the data acquisition module using standard serial communication? I did make a program with python that can read serial port, but I not have any response. Greetings.
Date published: 2019-07-20
Rated 1 out of 5 by from Not recommended It stopped working after 1-year use, error while setting data scanning rate. Doesn't support USB.
Date published: 2019-05-27
Rated 2 out of 5 by from Caution: Input volt/current spike can damage 2401 The unit is easily damaged if there is a voltage/current spike, this renders the 2401 device useless. This has happened on three of 4 Omega units. Easy to use, but unprotected. Ex: A suspected voltage spike occurred during DAQ, the unit(s) then began showing erratic thermocouple readings. We restarted all devices and found that the Omega 2401 would not "Configure."
Date published: 2018-09-10
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Using the DAQ-USB-2401 unit with analog pressure sensors with 4-20mA output what resistor is required to convert the signal to a voltage, what software settings do you set the DAQ to for voltage input, and how do you get the actual sensor reading?

Asked by: jstan6053
Thank you for your question. We would recommend a 250 ohm resistor OMX-R250 and setting up the Daq device to 5 volt range.
Answered by: Kim B
Date published: 2020-09-25

How do I download the free software? I can't get to the FTP site (with Internet Explorer, Chrome, or Edge).

Asked by: Dmtri
Thank you for your question. Please see link to download DaqCentral software:
Answered by: Application Engineer PV
Date published: 2022-11-15

Is the DAQ compatible with windows 10? The software installs correctly, but the driver has not.

Asked by: Norman
Thank you for your question. The software is compatible with Windows 10. If you are having issues with installation than please e-mail our Data Acquisition Dept- DAS@OMEGA.COM and they will be able to assist you.
Answered by: Raptor
Date published: 2021-03-10

Which format is the data export to?

Asked by: TanU
Thank you for your question. You can save file as .CSV or Binary.
Answered by: Application Engineer PV
Date published: 2023-05-15
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