When you need a dependable data acquisition recorder, the first decision is usually whether to spend more on a complete signal-conditioning package or save with a simpler industrial logger. Here, the choice is between the DATAQ DI-720-USB and the ThermoFisher DataTaker DT82I Series 3. Both are used units made in the United States, but they are separated by $100. One bundles a front-end hardware set; the other is a focused industrial logging solution. That difference drives the buying decision.
Quick verdict
For most projects, the ThermoFisher DataTaker is the better value. It costs $249.99, which is 29% below the DATAQ's $349.99, and its package is more straightforward. If your application depends on the bundled data acquisition hardware, the DATAQ justifies its higher price, even though it comes with more condition caveats.
At a glance
| Product | Price | Condition | Key appeal |
|---|---|---|---|
| DATAQ DI-720-USB Data Acquisition System w/ DI-5B Amplifiers & MESA Interface | $349.99 | Used | DI-5B amplifiers plus MESA interface |
| ThermoFisher DataTaker DT82I Series 3 Industrial Data Logger w mount | $249.99 | Used | Industrial design with mount |
Where each product wins
- DATAQ DI-720-USB wins when the included front-end hardware is essential to your signal path.
- ThermoFisher DataTaker DT82I Series 3 wins when you want a lower-cost logging package with an industrial focus.
Product notes
DATAQ DI-720-USB Data Acquisition System w/ DI-5B Amplifiers & MESA Interface
The DATAQ DI-720-USB is the more complete front-end bundle in this pairing, because the product name includes both the DI-5B amplifiers and the MESA interface. If your application already revolves around that kind of signal conditioning, this is the unit that gives you the needed hardware in a single purchase. The trade-off comes from the condition story: it was sourced from a university surplus setting, arrived very dusty, and is sold as-is because the seller could not test it. You may need to invest time cleaning and checking the system before it is ready for reliable logging. Choose this one when the amplifier/interface combo matters more than a clean hands-off purchase.
ThermoFisher DataTaker DT82I Series 3 Industrial Data Logger w mount
The ThermoFisher DataTaker DT82I Series 3 is the more straightforward industrial recorder. The unit looks and works great and comes complete with everything shown in the photos, which makes it the less risky of the two used options. Its package also includes a mount, so installation does not require buying a separate bracket. The limitation is that the appeal is a focused logger rather than a modular stack of amplifier options. If you need a dependable recording core and don't need extra signal-conditioning modules, this gives you that without the extra steps that come with an as-is bundle.
Final choice by use case
Choose the DATAQ DI-720-USB if your signal path depends on the bundled acquisition hardware and you are willing to work through a unit that may need cleaning. Choose the ThermoFisher DataTaker DT82I Series 3 if you want an industrial logger and prefer a more straightforward used-condition experience. That is the better default for most fixed logging jobs.
