If you're in the market for data acquisition recorders, the first decision is usually about scope: do you need a straightforward data acquisition system, or a unit that also works as a process controller? The Eurotherm Nanodac and the DATAQ Instruments DI-500-16 answer that question differently, and the price gap between them makes the choice worth thinking through.
Quick verdict
The Eurotherm Nanodac Invensys Recorder Process Controller Data Logger Ethernet USB is the more versatile pick in this pairing. It combines recording with control and is listed at $416.04, about 34% below the $635.00 price of the DATAQ Instruments DI-500-16. The DATAQ system only becomes the better fit if your project is built specifically around a DATAQ Instruments data acquisition unit.
Comparison at a glance
| Product | Listed Price | Condition | What the product name tells you |
|---|---|---|---|
| Eurotherm Nanodac Invensys Recorder/Controller | $416.04 | Used | Recorder, process controller, data logger with Ethernet and USB |
| DATAQ Instruments DI-500-16 | $635.00 | Used | Data acquisition system in the DI-500-16 series |
Where each product wins
Eurotherm Nanodac wins when you want one unit to handle both recording and controller duties. It also has Ethernet and USB, which gives it useful networking and file-transfer options for an industrial setting.
DATAQ Instruments DI-500-16 wins when you need the DI-500-16 model specifically. The product name makes the model series clear, and the unit is a straightforward data acquisition system rather than a recorder/controller combination. Be aware that it is sold without an expressed warranty.
Product notes
Eurotherm Nanodac Invensys Recorder Process Controller Data Logger Ethernet USB
This used Eurotherm Nanodac is a genuine unit made in the United Kingdom and removed from a working system. It includes a color display, multiple universal analog inputs, relay outputs, and data logging, so it is built for recording plus process control in one box. The limitation is its physical condition: it is a used unit with normal cosmetic wear, including light scratches and minor marks on the bezel. If you can accept that wear, the Nanodac gives you a lot of functionality without stretching your budget.
DATAQ INSTRUMENTS DATA ACQUISITION SYSTEM DI-500-16
This is the product to pick when your workflow is tied to the DATAQ Instruments DI-500-16. The product name identifies the exact model series, so you know what you are considering. The main limitation is that the unit is offered as-is with no expressed warranty, so you take on more risk if it does not meet your needs. If you specifically need the DI-500-16 platform, this is a direct match; if you are open to a more feature-rich recorder, the Eurotherm is the safer direction.
Final choice by use case
- Choose the Eurotherm Nanodac if you want one unit that records, logs, and controls, and you prefer the lower listed price in this pair.
- Choose the DATAQ Instruments DI-500-16 if your project calls for that exact data acquisition model and you are comfortable with an as-is unit.
