HP / Agilent / Keysight · Multimeter · c.1991–2016
For a lot of engineers, the 34401A simply is the bench meter. HP launched it in 1991, pitched as a new price and performance standard, and Agilent later wrote that it was one of the most successful products in the company's history. It brought 6½ digits, 1,000 readings a second, and both HP-IB and RS-232 as standard, and it understood three command languages, SCPI plus those of the HP 3478A and the Fluke 8840A, so old test programs kept running. The vacuum-fluorescent display reads well from any angle, and with no fan it's quiet on the bench. It was sold as an HP, then an Agilent, and finally a Keysight, until Keysight discontinued it on December 1, 2016 and named the 34461A as its replacement. The badge doesn't change the meter, so buy on condition and calibration.
Options and accessories
Check the listing photos and the rear panel against this list, and ask the seller about anything you can’t see. A missing option or probe should come off the price.
One documented repair of a dead 1992 meter traced it to shorted tantalum capacitors on the supply rails and a failed logic chip in the A/D, which the self-test flagged as error 604. The front and rear current inputs each have their own fuse, so a meter that reads volts but not amps usually just has a blown fuse. Calibration lives in an EEPROM, so there's no backup battery to worry about.
New to used bench gear? How to check used test equipment covers self-tests, fuses, the voltage selector and shipping, and what “calibrated” means in a listing.
Buying guide
We'd buy fourgt's Keysight-badged 34401A at $418 delivered, at the bottom of the $410–575 band, titled with test leads and calibration from a US test-equipment dealer. With at least 144 for sale you can be choosy, and US units titled working or tested ask $414–629 delivered. Ask any seller to hold Shift while switching on for the full self-test, which should end with PASS, and for a reading next to a trusted meter, plus the certificate and its date where a title says calibrated. Several China listings use watermarked photos (FUMISO, Aimevo) that recur across accounts, and Keysight warns of counterfeits, so ask for a photo of the actual unit's serial label. Skip the $996 unit at about 2.1 times the median.
$303.32est. delivered
The lowest delivered 34401A at $303, from a US seller. It isn't titled tested and the photo shows it switched off, so ask for the full self-test result before you buy.
Hewlett Packard 34401A Digital Multimeter
$418.12est. delivered
Titled with test leads and calibration at $418 delivered, from fourgt, a US test-equipment dealer. Calibration in a title is a claim, so ask for the certificate and its date.
Keysight 34401A 6.5 Digit Multimeter - Dark Gray Incl. Test Leads & CALIBRATION
$489.26est. delivered
Titled tested and working by jayhoehlinc, a US test-equipment dealer, at $489 delivered with shipping quoted. The photo shows every display segment lit, and ask for the self-test PASS screen too.
Agilent/HP 34401A 6.5 Digit Digital Multimeter Tested & Working #16
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Snapshot
Checked . Some may have sold.
Delivered prices include shipping as eBay quoted it to a US address on Oct 14, 2026. Many sellers charge by distance, so your total may differ. eBay shows yours before you pay.
Used$303.32est. delivered
$295.00 + $8.32 shipping
Buy It Now$295.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Not titled tested, and the photo shows it switched off.
Seller: allezle_83
100% positive
Used$418.12est. delivered
$399.00 + $19.12 shipping
Buy It Now$399.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Good buy
Titled with test leads and calibration. Ask for the certificate and its date.
Seller: fourgt
100% positive
Used$489.26est. delivered
$399.95 + $89.31 shipping
Buy It Now$399.95
Good buy
Titled tested and working, from a US dealer. Photo shows the display lit.
Seller: jayhoehlinc
100% positive
Used$409.50delivered
$409.50 · free shipping
Buy It Now$409.50
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled tested; photo shows a current reading. Ships from China, so ask for a photo with the serial.
Seller: industrial-discount-store
100% positive
Used$413.85est. delivered
$395.00 + $18.85 shipping
Buy It Now$395.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Our take
Titled working, ships from the US.
Seller: microtexelectronics
100% positive
Used$628.89est. delivered
$599.00 + $29.89 shipping
Buy It Now$599.00
Our take
Titled tested, spot-on and very clean. US seller.
Seller: dimmog33
100% positive
Used$375.00est. delivered
$295.00 + $80.00 shipping
Buy It Now$295.00
Check the seller
Ships from China under a FUMISO watermark that recurs across accounts, so this may not be the unit you get.
Seller: lhy-tech
99% positive
Used$996.07est. delivered
$950.00 + $46.07 shipping
Buy It Now$950.00
This seller takes offers, and many sellers accept less than the asking price.
Fine if you might miss it? Send an offer first. Someone else can still buy it while you wait for a reply.
Want it for sure? Use Buy It Now.
Priced high
About 2.1 times the median, with nothing extra titled to explain it.
Seller: semiequipmentworld
100% positive
Prices change daily. The live eBay search shows everything listed now, including anything new since Oct 14, 2026.
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