If you're shopping for data acquisition recorders, you're likely comparing instruments that serve different jobs. The Keithley DAQ6510 and Madgetech PR1000-300-PSIG are both recorders, but they approach the task from opposite directions: one is a flexible benchtop system, the other a compact submersible logger.
Quick verdict
The Keithley DAQ6510 Data Acquisition DMM6500 Multimeter System, priced at $1,600, is a used two-slot mainframe that suits flexible benchtop data acquisition. The Madgetech PR1000-300-PSIG, priced at $699, is a new pressure and temperature logger built for submersible field use. Pick the Keithley if expansion potential and multimeter capability matter most; pick the Madgetech for portable pressure logging.
| Product | Price | Condition | Key strengths |
|---|---|---|---|
| Keithley DAQ6510 Data Acquisition DMM6500 Multimeter System | $1,600.00 | Used | Two-slot mainframe; combines data acquisition with a DMM6500 multimeter system |
| Madgetech PR1000-300-PSIG Pressure and Temperature Data Logger | $699.00 | New | 0 to 300 psig range; fully submersible; stores over 1.3 million readings |
Where each product wins
The Keithley DAQ6510 wins when you need a bench-top system that can grow with you. Its two slots allow you to add switching or measurement cards, and the DMM6500 multimeter core means it can work as both a data acquisition recorder and a standalone digital multimeter. It's the more versatile instrument, but it's also the more expensive one.
The Madgetech PR1000 wins when you need a self-contained pressure and temperature logger that's ready to go out of the box. With a ¼-inch NPT fitting, a 0 to 300 psig range, and full submersion capability, it's built for process lines, tanks, and environmental monitoring. It stores more than 1.3 million readings, so you can leave it in the field for long stretches.
Keithley DAQ6510 Data Acquisition DMM6500 Multimeter System
The DAQ6510 is a used two-slot mainframe that combines data acquisition and digital multimeter functions in one benchtop unit. At $1,600 it's the higher-cost option, but the value is in its flexibility: you can equip the two slots with different switching and measurement cards as your application changes. That makes it a strong centerpiece for a lab or production bench where you need to measure a variety of signals over time. The main limitations are the price and the form factor-it's not portable or submersible, and it's listed as used rather than new. If you need a ready-to-run pressure/temperature logger, this isn't it.
Madgetech PR1000-300-PSIG Pressure and Temperature Data Logger
The Madgetech is a new, compact logger that measures pressure, temperature, and transient pressure, covering 0 to 300 psig. At $699 it's the more affordable of the pair, and it's built for tough environments: fully submersible, with a ¼-inch NPT fitting for easy process hookups. It stands just 4 inches tall and 1 inch in diameter, so it fits into tight spaces, and the internal temperature sensor covers -40 to 176°F. The limitation is its narrower scope: it's dedicated to pressure and temperature logging, so it won't handle voltage, resistance, or other multimeter-style measurements. Also, its temperature accuracy is ±2.0°C, which is adequate for monitoring but not for precision calibration work.
Final choice by use case
Choose the Keithley DAQ6510 if you need a benchtop data acquisition recorder that can be adapted to different measurement jobs through its two-slot mainframe and DMM6500 multimeter core. It costs more and is listed as used, but it offers a path to expand. Choose the Madgetech PR1000-300-PSIG if you need a new, submersible pressure and temperature logger with a large data capacity at a significantly lower price. For portable, process-oriented logging, the Madgetech is the practical pick.
