Keithley · Multimeter · c.1992 (now discontinued)
Keithley sold the 2001 alongside the 8½-digit 2002 as high-performance DMMs that did most of what far costlier lab meters did, and its Quick Reference Guide is dated 1992. Keithley made a point of true 7½-digit resolution from a 28-bit A/D converter, where rivals averaged readings to get there, and a single range that reads from 1 µV to 20 V without a range change. AC is unusually strong, with TRMS, average, peak and crest-factor modes, and Keithley claimed better than 0.1% accuracy down to 1 Hz. xdevs notes the reference is an ovenized LM399 and the case is half-rack width, so two fit side by side. Memory size is part of the model name, plain 2001, 2001/MEM1 or 2001/MEM2, so read the label. It's discontinued now.
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.
xdevs warns against powering up a long-stored 2001 before checking it, because aging electrolytic capacitors leak and cause more damage. Its repair log also covers failed JFETs in the input circuits and a failing DS1245Y memory chip that makes the meter hang after warm-up.
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 the 2001 at $900 with free shipping from a US seller, whose photo shows it finishing power-on with its serial number and STD memory on screen. There are at least 76 for sale, and the $1,675–2,425 band is set by China resellers around $2,250 delivered, while US sellers here ask $900–1,300 for plain units and $1,679 for one titled NIST calibrated with data. xdevs warns against powering up a long-stored 2001 before checking it, because old electrolytic capacitors leak, so ask whether it's been recapped, and ask the seller to leave it on for an hour and then press a few keys, since a failing memory chip makes it hang after warm-up. Check the memory size on the power-on screen or label (STD, MEM1 or MEM2), and skip the $3,526 China unit, which asks nearly four times the cheapest US one with nothing extra in the title.
$899.99delivered
The lowest delivered 2001 at $900 with free shipping, and the photo shows it finishing power-on with its serial and STD memory. It isn't titled tested, so ask for a reading after an hour's warm-up.
Keithley 2001 Digital Multimeter - Free Shipping
$899.99delivered
About $775 under the band from a US seller, and the power-on photo shows it's alive with the standard memory. Ask whether the electrolytic capacitors have been replaced, since leaking ones are the big risk on a stored 2001.
Keithley 2001 Digital Multimeter - Free Shipping
$1,679.00delivered
Titled NIST calibrated with data, from a US test-equipment dealer, at $1,679 with free shipping, right at the bottom of the band. Ask for the certificate's date and check its serial matches the meter.
Keithley 2001 7.5 Digit Multimeter NIST Calibrated with Data
$1,679.00delivered
The only 2001 here titled calibrated with data, so it should need the least work before it's on your bench. Ask how it'll be packed, since it should travel double-boxed with foam all round.
Keithley 2001 7.5 Digit Multimeter NIST Calibrated with Data
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$899.99delivered
$899.99 · free shipping
Buy It Now$899.99
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.
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Good buy
Free shipping. Photo shows the power-on screen with its serial and STD memory.
Seller: tech-world43228
99.7% positive
Serviced$1,679.00delivered
$1,679.00 · free shipping
Buy It Now$1,679.00
Good buy
Titled NIST calibrated with data. Free shipping.
Seller: stratatek
100% positive
Used$1,075.00est. delivered
$950.00 + $125.00 shipping
Buy It Now$950.00
Our take
From a US test-equipment dealer, $125 shipping. Not titled tested.
Seller: semiequip
100% positive
Used$1,299.99delivered
$1,299.99 · free shipping
Buy It Now$1,299.99
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 B16, free shipping. Photo shows it reading 170 mV.
Seller: tech-world43228
99.7% positive
Used$2,256.00delivered
$2,256.00 · free shipping
Buy It Now$2,256.00
Our take
Ships from China, free shipping. Ask for a photo of this unit with its serial.
Seller: im-test
100% positive
Used$1,850.00delivered
$1,850.00 · free shipping
Buy It Now$1,850.00
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.
Check the seller
Title matches another seller's listing. Ships from China, and the photo may be stock.
Seller: equipstore
99% positive
Used$3,525.90delivered
$3,525.90 · free shipping
Buy It Now$3,525.90
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
Ships from China, titled working. Nearly four times the cheapest US unit.
Seller: yuajjcpu
100% positive
Refurbished$4,610.42est. delivered
$4,471.99 + $138.43 shipping
Buy It Now$4,471.99
Priced high
Titled with expired cal, on a refurbished card, and the photo shows the original Keithley carton. About twice the median.
Seller: testeqe
100% positive
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