Two used data acquisition recorders with very different personalities are competing for the same space on your bench. One is a self-contained recorder/controller; the other is a data acquisition system designed to scale with your needs. The right choice depends on whether you want an integrated box for a specific process or a flexible system for a growing list of measurements. Both are used units, so the condition of the specific item you receive is part of the decision, and neither unit is a new-in-box purchase.
Quick verdict
The Eurotherm Nanodac is the pick if you need recorder functions and process control in one unit. The Keithley DAQ6510 is the pick if you need a bench-oriented data acquisition system that can handle more than one type of measurement. The two sit at opposite ends of the price spectrum, but that gap mirrors their different roles on a test bench.
At a glance
| Feature | Eurotherm Nanodac | Keithley DAQ6510 |
| Listed price | $416.04 | $1,600.00 |
| Condition | Used | Used |
| Country of Origin | United Kingdom | China |
| Core role | Paperless recorder and process controller | Data acquisition and DMM6500 multimeter system |
| Distinctive design | Ethernet, USB host, analog inputs, relay outputs | 2-slot expansion architecture |
Where each wins
If you need a single instrument that can act as both a recorder and a process controller, the Eurotherm Nanodac is the more direct solution. It suits panel builders and small-line automation because it packs the roles of logging and control into one housing, avoiding the need to coordinate separate modules.
If you are setting up a bench for electrical measurement and logging, the Keithley DAQ6510 offers the more expansive platform. Its design centers on data acquisition, making it a natural fit for labs that want one instrument to handle a range of signals and grow over time.
Eurotherm Nanodac Invensys Recorder Process Controller Data Logger Ethernet USB
The Eurotherm Nanodac, listed at $416.04, is a paperless recorder and process controller from the United Kingdom. It offers a color display, Ethernet and USB host connections, multiple universal analog inputs, relay outputs, and data logging inside one box. That makes it a straightforward choice if you want a complete panel or benchtop station without assembling separate modules. The limitation is its cosmetic condition: light scratches and minor marks on the bezel are normal for a unit removed from a working system. If you can accept that visual wear, the integration and connectivity are a strong part of the appeal. The data logging function is built in, so you do not need to pair it with a separate logger to capture process history. Its multiple universal analog inputs also give you flexibility in what you connect.
DAQ6510 Data Acquisition DMM6500 Multimeter System
The Keithley DAQ6510 is listed at $1,600.00 and takes a different approach. It is a data acquisition system built around the DMM6500 multimeter, with two slots available for adding modules. That expansion capability is the clearest reason to choose it: a test bench can grow from basic logging to multi-channel scanning without changing platforms. The limitation is the higher price, plus the fact that it comes from China. You are paying for the multimeter function and the slot-based flexibility, so it suits buyers who expect to need those capabilities. If your work involves electrical measurements and you want a single box that can scan multiple inputs, the DAQ6510's design points in that direction.
Final choice by use case
Choose the Eurotherm Nanodac if an integrated recorder/controller for a focused process is what your work calls for. Choose the Keithley DAQ6510 if your priorities center on a bench-oriented data acquisition system.
