Choosing between data acquisition recorders often comes down to how many inputs you need and what you intend to measure. The Onset HOBO UX120-006M and UX120-018 both offer USB connectivity and a built-in LCD, but they point at very different logging jobs.
Quick verdict
For broad multi-parameter logging-temperature, humidity, voltage, current, carbon dioxide, power, and pulse/event-the Onset HOBO UX120-006M at USD 144.00 is the more flexible pick. For dedicated single-load power and energy monitoring, the Onset HOBO UX120-018 at USD 129.00 is the simpler, more focused recorder.
Price and feature comparison
| Product | Channels | Measurement focus | Listed price | Price bar |
|---|---|---|---|---|
| Onset HOBO UX120-006M 4-Channel Analog Data Logger | 4 | Temperature, electricity usage, humidity, voltage, current, carbon dioxide, power, pulse/event | USD 144.00 | |
| Onset HOBO UX120-018 Plug Load Data Logger | 1 | Power/energy consumption with external sensor | USD 129.00 |
Both units are listed as new open-box items. The $15 spread between the two listed prices is modest, so the bigger difference is in channel count and measurement focus.
Where each product wins
- Onset HOBO UX120-006M: Its broad parameter list and multiple analog inputs make it the more accommodating recorder when your logging session spans different sensor types.
- Onset HOBO UX120-018: Its dedicated external sensor and plug-load design make it the more targeted recorder when you only care about power and energy use.
The fork in the road is how many inputs you plan to monitor at once. A one-input task may feel wasted on a multi-input recorder, and a multi-input task will hit a wall on a single-channel device. If your monitoring needs change over time, the extra input capacity of the UX120-006M gives you room to grow without buying another logger.
Product notes
Onset HOBO 4-Channel Analog Data Logger, UX120-006M LCD Display
The UX120-006M is the multi-parameter option in this pair. Its four-channel design lets you record temperature, electricity usage, humidity, voltage, current, carbon dioxide, power, and pulse/event data through one USB-connected device. That makes it a good fit for labs, HVAC checks, and general industrial monitoring where more than one measurement matters. It also comes with new batteries and all accessories, so you can begin logging soon after unboxing. The trade-off is the higher listed price of the two, and the broad feature set means you are choosing a general-purpose recorder over a dedicated single-task power monitor.
Onset HOBO UX120-018 Plug Load Data Logger w/ LCD Display
This is the dedicated power-and-energy option. The UX120-018 pairs a single channel with an external sensor and describes itself as a plug load data logger, so it is aimed squarely at measuring the power draw of one device or circuit. The LCD display gives you immediate feedback, and the USB interface ties into your computer for later analysis. Its listed price is the lower of the two, so you keep some budget room for other equipment. The limitation is the single channel: if you need to log multiple loads or also track environmental parameters like temperature or humidity, you will outgrow this unit quickly.
Final choice by use case
Choose the Onset HOBO UX120-006M when your data acquisition job demands a range of measurable parameters and input flexibility. Choose the Onset HOBO UX120-018 when your only goal is to monitor power or energy consumption on a single plug load and you want a focused, simpler recorder.
