Choosing a data acquisition recorder often comes down to how many inputs you can log, whether it covers the signals you care about, and how easily you can get data off the device. The Graphtec Midi Logger GL220 aims to solve that with 10 channels and a USB interface, and it's worth taking a close look at if you need a flexible benchtop logger.
Quick verdict
The GL220 is a capable multi-channel data acquisition recorder for industrial and lab use. It measures voltage, current, power, pulse/event, and count across 10 channels, and it connects to a computer over USB for straightforward data analysis. At $450, this used unit offers a practical starting point for anyone who needs one device for common measurement tasks.
Who it suits
This is a good fit for quality control, equipment inspection, or research work where you want to collect data from multiple points without juggling separate instruments. The USB interface makes it simple to pull logged data into your analysis workflow, so it works well in a benchtop setup or in the field where you can bring the recorder back to the computer.
What stands out
Rather than forcing you to pick a dedicated voltmeter or pulse counter, the GL220 combines several input types in one unit. That flexibility saves setup time because you can handle multiple measurement modes without switching instruments.
Graphtec Midi Logger GL220
The GL220's clearest strength is its combination of 10 channels and five measurement modes. It measures voltage, current, power, count, and pulse/event signals, so you can use one recorder for several common data acquisition tasks. The trade-off is the channel count: if your monitoring job needs more than 10 simultaneous points, you'll outgrow this unit and need a recorder with more inputs.
Meaningful trade-offs
The main trade-off is the used condition. The GL220 is a pre-owned unit, so it has prior use. If you're logging critical quality-control or research data, that's a factor to weigh alongside the $450 price.
Bottom line
If you need a compact data acquisition recorder that can handle common signal types and give you multi-channel logging without an oversized budget, the Graphtec Midi Logger GL220 is a strong candidate. Its combination of USB connectivity and versatile measurement modes makes it a practical choice for many industrial and research tasks. Just be clear on the trade-offs: it's a used unit, and its input capacity sets a ceiling for how many points you can monitor at once.
