Fluke 787 vs 787B (2026): Which ProcessMeter Should You Buy?

Why you should trust this comparison

I built this comparison from Fluke’s published manufacturer specifications and the documented, widely circulated feature sheets for both ProcessMeters, not from any bench test of my own. The 787 and 787B are long-running, well-documented instruments, so the headline numbers, the multimeter ranges, the loop-calibration capability, and the safety ratings, are all established in Fluke’s literature and the retail feature snippets that accompany each model. Where Fluke states a figure clearly, I report it; where the difference between the two units is documented only qualitatively, I say so plainly rather than inventing a precise number.

My goal is to help you choose between two closely related tools without overstating the gap. These are not radically different instruments. The 787B is the evolution of the 787, and Fluke kept the fundamental design intact while refreshing the display and electronics. I lean on the spec sheet for what is certain and flag the areas, like exact accuracy percentages and firmware-level changes, where buyers should confirm against Fluke’s current datasheet for their specific unit before relying on it for calibration work.

How we compared them

I compared these two ProcessMeters on the criteria that matter to the people who actually carry them: the quality of the multimeter, the loop-calibration features, the display, the safety rating, and overall fit for process instrumentation. The single most important shared capability is that each device is both a true-RMS digital multimeter and a 4 to 20 mA loop calibrator and simulator in one housing, which is the entire reason a technician reaches for a ProcessMeter instead of a separate meter and a separate loop calibrator.

Beyond the core function, I weighed the practical differences a buyer will notice day to day. That means display readability, whether the unit is in current production and therefore easier to support and recalibrate, and the documented refinements Fluke introduced with the 787B. I deliberately avoided ranking them on invented performance margins. Where the published specs are effectively the same, I treat them as the same, and I steer the recommendation on availability, display, and long-term supportability instead.

How they compare at a glance

Fluke 787

The Fluke 787 is the original ProcessMeter, and it set the template that the whole line follows: a genuine true-RMS digital multimeter and a 4 to 20 mA loop calibrator combined in one rugged handheld. Fluke designed the meter side to measure up to 1000 V and 440 mA true-RMS, and it is rated CAT III 1000 V per the IEC 61010 standard, so it covers the electrical measurements an instrumentation technician makes alongside the loop work. The calibrator side can source, simulate, and measure milliamp signals, which lets you troubleshoot and commission control loops without carrying a second box.

This model suits the value-focused buyer who can find a well-maintained unit and wants the proven ProcessMeter feature set without paying for the newest revision. It is genuinely capable and shares the core measurement and sourcing functions with its successor, so for many field tasks the experience is very similar to using the 787B.

The honest limitation is age. The 787 is the earlier generation, so it lacks the larger refreshed display Fluke added with the 787B, and depending on where you buy it you may be looking at used or older stock. That can matter for calibration traceability and for long-term service and recalibration support, which are easier to arrange on a current model.

Fluke 787B

The Fluke 787B is the current ProcessMeter and the direct evolution of the 787. It carries forward the same fundamental combination of a true-RMS DMM rated to 1000 V and 440 mA per Fluke and a 4 to 20 mA loop calibrator that can source, simulate, and measure, while updating the parts of the design buyers interact with most. The most visible upgrade is the display: Fluke fitted a larger, easier-to-read dual display so you can see both the measured value and the sourced value clearly in the field.

This is the model I would point most new buyers toward. Because it is in current production, it is simpler to purchase new, to get recalibrated on a regular schedule, and to support over the years you will own it. For a technician who relies on a ProcessMeter as a daily tool and wants the current revision behind them, the 787B is the straightforward choice.

The honest limitation is that the 787B is an incremental refresh, not a reinvention. If you already own a healthy 787, the documented gains, chiefly the improved display and being on the current platform, may not justify replacing a unit that still calibrates correctly. The core measurement and loop functions are closely matched, so the upgrade case is strongest for new purchases rather than replacements.

Which should you buy?

If you are buying new today, choose the Fluke 787B. It is the current ProcessMeter, it has the larger backlit dual display, and being in production makes recalibration and long-term support easier to arrange. For a technician who depends on this tool for daily process and loop work, those practical advantages outweigh the modest price the original commands secondhand.

If you are budget-driven and you come across a sound, well-cared-for Fluke 787, it remains a strong buy. It delivers the same true-RMS multimeter and the same 4 to 20 mA loop calibration that define the line, so the core job gets done. Just confirm its condition and, if you depend on accuracy, get it calibrated before you trust it. Choose the 787 to save money on a proven design, and the 787B when current support and the better display matter more.

Frequently asked questions

What is the difference between the Fluke 787 and 787B? The 787B is the updated, current-production ProcessMeter. It shares the core true-RMS multimeter and 4 to 20 mA loop calibrator with the 787, and the headline change Fluke documents is a larger, refreshed dual display along with updated electronics.

Can both source and simulate a 4 to 20 mA loop? Yes. Fluke documents both the 787 and 787B as 20 mA loop calibrators and simulators that can source, simulate, and measure milliamp current, which is the defining feature of the ProcessMeter line.

Are they safe for high-voltage electrical work? Both are designed to meet CAT III 1000 V per the IEC 61010 standard according to Fluke, and both are rated as true-RMS meters up to 1000 V, so they cover the electrical measurements common in instrumentation work. Always check the rating against your task.

The verdict

These two ProcessMeters are close cousins, and that is the point. The Fluke 787B is the one I recommend for new buyers because it is the current model, it has the larger backlit display, and it is easier to support and recalibrate over its life. The Fluke 787 is still a sound, value-oriented choice if you find a healthy unit, since it shares the same true-RMS multimeter and 4 to 20 mA loop calibration that make the line so useful. Buy the 787B for current support and the better display, and the 787 to save money on a proven design.