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USB oscilloscope vs handheld

Updated: 22 October 2026

You are choosing between a small USB box that needs your laptop and a battery scope with its own screen, and the word portable is doing too much work. A USB oscilloscope vs handheld decision, in this set, is the PicoScope 2204A against a BSIDE you can switch on without a computer. The Hantek at £215.99 is a third shape, a bench unit, even though its title says handheld. Peter F. used the amazon.co.uk listings on 21 October 2026, not a bench we ran. If you buy through our links, we may earn a commission at no extra cost to you. The full table is the [oscilloscope comparison](/hub/measuring-equipment/oscilloscope).

You are choosing between a small USB box that needs your laptop and a battery scope with its own screen, and the word portable is doing too much work.

Our top picks

Pico Technology PicoScope 2204A

Best overall

Pico Technology PicoScope 2204A
8.3/10about £126
View offer
BSIDE BSIDE OT3

Best value

BSIDE BSIDE OT3
7.3/10about £39.99
View offer
Hantek Hantek DSO2D15

Alternative

Hantek Hantek DSO2D15
7.9/10about £215.99
View offer
On this page
  1. 1.Three different boxes
  2. 2.Screen, probes, and power
  3. 3.When the USB scope is the wrong earth
  4. 4.Which to buy for which job

Three different boxes

A USB oscilloscope in this set means the PicoScope 2204A at £126: two channels, 10 MHz, 100 MS/s, and 8 kS, with the screen on the computer. The star line is 4.7 from 150. Bandwidth maths stays on the oscilloscope buying guide. A handheld, for this page, means a battery instrument with its own screen and no laptop in the loop. The BSIDE OT3 at £39.99 is the one-channel example, with a probe in the box and 4.6 from 31 reviews. The two-channel BSIDE at £79.99 adds a touch screen and a generator, with one probe listed. Two traces away from a desk means that listing, not the OT3. The Hantek is neither of those. It is 1 kg and 31.6 cm long, titled at 150 MHz, and the specification table does not list a battery. Calling it a pocket scope because the title says handheld will send you out with a mains instrument.

Screen, probes, and power

The 2204A's screen is the computer. You give up a trace with nothing else switched on. The OT3 and the two-channel BSIDE show the wave on the instrument. The OT3 menu draws complaints, but the trace exists without the laptop. Probes split the prices. The 2204A ships as the scope, a manual, and a USB lead, so £126 is the start of the kit. The OT3 lists a BNC probe and an alligator lead. The two-channel BSIDE lists one BNC probe, so the second channel is a socket until you buy another lead. The Hantek title includes a P4100 probe, and UK reviews disagree about the count. For a first afternoon, the OT3 is the one that clearly arrives as a one-channel kit. The 2204A is USB powered, so there is no trace when the laptop is shut. The OT3 and the £79.99 BSIDE quote multi-hour runtimes from their cells. Those are listing claims. The Hantek table lists no battery.
Pico Technology PicoScope 2204A

Testsieger

Pico Technology PicoScope 2204A
8.3/10about £126
View offer

When the USB scope is the wrong earth

The 2204A is not isolated because it has no mains plug of its own. The ground clip follows the computer's ground. If that computer is on an earthed supply, the clip is near earth. The listing does not claim isolated inputs. HSE's INDG354 tells you not to lift protective earth to float a Class I instrument. Do not solve a USB ground by defeating the laptop supply. Use the 2204A for low-voltage, ground-referenced work: audio, a hobby board, a signal that already shares ground with the computer. A battery handheld removes the computer from the loop. It does not turn the clip into a floating, CAT-rated probe. None of these listings prints a CAT rating. If the measurement is unsafe with an earthed clip, neither form in this set is the right tool. UK reviews still praise the 2204A for basic car waveforms on the standard software. That is a low-voltage story, not a certificate. The automotive software is a different product, on the automotive oscilloscope page. A CAN trace on a laptop does not mean the ground clip is wise on a coil or an EV pack.

Which to buy for which job

Buy the PicoScope 2204A if you already use a computer and you will buy probes. Buy the OT3 for one channel and a probe in the box. Buy the £79.99 two-channel BSIDE if you need two traces without a PC, and add a second probe. Buy the Hantek only as a bench scope with the 150 MHz title, not as the handheld.

Common questions

Do I need a computer for the PicoScope 2204A?
Yes. It is USB powered and the screen is the computer running PicoScope software. The listing names Windows, Linux, and Mac. One review says their copy only worked with version 6. There is no built-in display and no battery. If the laptop stays at home, this listing cannot show a trace. The £126 price also excludes probes, so the computer is not the only extra.
Are probes included?
The OT3 lists a BNC probe and an alligator lead. The £79.99 BSIDE lists one BNC probe for two channels. The 2204A's box is the scope, a manual, and a USB lead, without probes. The Hantek title includes a P4100 probe, and UK reviews disagree about whether one or two arrived. A missing probe is a further cost, not a reason to put the ground clip on an unsafe point.
Is a USB scope isolated because it has no mains plug?
No. The ground clip follows the computer. If the computer's supply is earthed, the clip is near earth. The 2204A listing does not claim isolated inputs. A battery handheld removes the laptop from the loop and still has a ground clip on the BNC shell. Neither form in this set prints a CAT rating.
Is the Hantek a handheld?
The title says handheld. The body is 1 kg and 31.6 cm long, and the specification table does not list a battery. Treat it as the bench scope in this comparison, with a 150 MHz title and a 25 MHz generator bullet. Do not pack it as the pocket alternative to the OT3 or the 2204A.
Which is the better first buy under £100?
The OT3 if you need one channel and a probe in the box, at £39.99 with 4.6 from 31 reviews. The £79.99 two-channel BSIDE if you need two traces and you will buy a second probe. The 2204A is £126 before probes, so it is outside that budget. Under £100 you are choosing a battery screen, not the USB software.

Related pages

Best oscilloscope for beginners

Oscilloscope

Automotive oscilloscope: 12 V signals, not Pico kit

Oscilloscope buying guide: bandwidth, probes, earth

How to use an oscilloscope: clip, 10X, then trigger

Sources

Public UK sources last checked on 21 October 2026. Shelf prices and star lines are the amazon.co.uk figures captured with these ten listings. The price bands are this set, not a market average.

  1. HSE GS38: Electrical test equipment for use on low voltage electrical systems (retrieved 21 October 2026)
  2. HSE INDG354: Safety in electrical testing at work (retrieved 21 October 2026)
  3. Electricity at Work Regulations 1989 (retrieved 21 October 2026)
  4. Consumer Rights Act 2015, section 9 (retrieved 21 October 2026)
  5. GOV.UK: Electromagnetic Compatibility Regulations 2016, Great Britain (retrieved 21 October 2026)
  6. Pico: oscilloscope tutorial (retrieved 21 October 2026)
  7. PicoScope 2204A series data sheet (retrieved 21 October 2026)
  8. Rohde & Schwarz UK: oscilloscope buyer's guide (retrieved 21 October 2026)