So you're looking at Keysight gear. Probably after seeing the 34465A multimeter or the E36313A power supply pop up in your search. Or maybe you just need a solid meter for electricians, or you're curious about that transparent smartphone concept I keep hearing about (though I'm not sure that relates to test gear).
The honest truth? There is no single 'best meter for electricians' or one perfect lab power supply. It depends entirely on what you're doing. This is not a one-size-fits-all situation. I'll break it down by three common scenarios I've seen in my years managing purchasing for a mid-sized R&D lab.
Scenario A: The High-Precision R&D Lab
You need the Keysight 34465A multimeter.
This is for when you're measuring millivolts, microamps, or doing long-duration data logging. The 34465A is a 6.5-digit meter with exceptional accuracy and a nice large display. If you're working on low-power IoT devices, sensitive sensor circuits, or anything where a 0.001% error means a failed test, this is your tool.
Example from my desk: Last year, our team was validating a new power management IC. We needed to log voltage drift over 24 hours. A cheaper 5.5-digit meter gave us noisy data. The 34465A with its Truevolt technology gave us clean, repeatable results. Worth the premium.
Watch out for: The 'penny-wise, pound-foolish' trap. I saved $200 once by buying a 'good enough' meter. Then spent 3 days troubleshooting a phantom issue that turned out to be meter noise. Net loss: way more than $200 in engineering time.
When to go for the E36313A instead?
If your main need is a clean, programmable DC power supply for powering up your prototypes—and you already have a decent meter—then the Keysight E36313A programmable DC power supply is the better pick. It's a 3-channel (6V, 2x 25V) supply with low noise and good output accuracy. Perfect for powering op-amps, microcontrollers, and analog circuits.
Scenario B: The General-Purpose Test Bench & Electrician's Work
This is where you need to be practical.
If you're a field electrician or running a general electronics repair shop, a 6.5-digit meter like the 34465A is likely overkill. You need a 'best meter for electricians' that's rugged, has good safety ratings (CAT III/IV), and measures AC/DC voltage, current, resistance, and maybe capacitance and frequency reliably.
For this, the Keysight handheld meters (like the U1230 series) or even a solid Fluke are more appropriate. Don't buy a 34465A for checking if a wall outlet has power—it's a lab precision instrument.
But what about the E36313A for a general bench?
Yes, for a repair bench, the E36313A is a great choice. It's compact, reliable, and the two tracking outputs are handy for powering bipolar circuits. I've used it for everything from audio amplifier repair to testing small DC motors.
My mistake: I once ordered a cheaper, no-name power supply for a repair station. It died within 6 months, and the ripple was so bad it caused intermittent issues. Replacing it with the E36313A eliminated those problems. That's the 'process gap' I should have avoided.
Scenario C: The Educational or Budget-Conscious Lab
You need capability, but the budget is tight.
This is the most common scenario I see. You're setting up a teaching lab or a startup workspace. You can't buy ten 34465A meters or ten E36313A power supplies.
Here's my advice:
- For DMMs: Get a few 34465A meters for the advanced students/projects. For the rest, a decent 5.5-digit multimeter (like the Keysight 34461A) or even a quality 4.5-digit meter will be sufficient for 80% of the work. The 34465A is the gold standard, but the 34461A is a very capable workhorse for less money.
- For power supplies: The E36313A is a great mid-range option. But if you need many channels, consider a single-channel, higher-current supply. The E36313A has three outputs, but only 1A on the 25V channels. For a digital logic class, that's fine. For a power electronics class, you might need more current.
The balancing act: I have mixed feelings about this. Part of me wants to equip every bench with top-tier gear. Another part knows that students learn a lot by working with instruments that have real-world limitations. I compromise: we have a few 'star' benches with premium gear, and the rest get good-but-not-great tools.
How to Decide: Which Scenario Are You In?
Ask yourself these questions:
- What do you measure most? If it's low-level DC signals, precision is king. → Scenario A (34465A).
- How critical is the data? Are you publishing results or just checking a circuit? If 'publish,' go with Scenario A. If 'just checking,' Scenario B.
- What's the budget? If you need ten units, Scenario C. If you need one, Scenarios A or B.
- Do you already have a good power supply? If yes, consider the 34465A as your next purchase. If not, the E36313A might be more urgent.
One more thing on that 'transparent smartphone' query: I'm not sure if that's a new test fixture or a design concept. If you're testing display transparency or RF signal penetration through transparent materials, then yes, a Keysight RF/microwave signal analyzer or VNA would be the tool. But that's a whole different conversation.
Note on pricing: As of January 2025, the Keysight 34465A lists around $1,500-$1,700, and the E36313A around $900-$1,100. These are list prices from Keysight; your authorized distributor may offer discounts. Verify current pricing.
