The best handheld oscilloscopes, compared.
Top pick: BSIDE O2 – Highest score: two stated channels, 50 MHz, 250 MS/s, a seven-waveform generator and United Kingdom texts at about £79.99. One probe in the box and nine reviews keep the score at 74. Best value: BSIDE OT3 – Best value at about £39.99 for 10 MHz, a probe and an alligator lead, with 4.6 from 31 and United Kingdom texts. A 200 kHz listing with no probe is not the better buy. Updated October 2026.
A handheld oscilloscope is a battery instrument with its own screen. You use it to draw voltage against time when a multimeter number is not enough. UK shoppers buy one for hobby electronics, study, light field work, or a 12 V vehicle check. A USB scope that needs a computer, and a mains bench scope, are different products. You tell a suitable one by bandwidth as a real limit, not the largest number in the title, then by channel count and whether a probe is in the box. Bandwidth is where a sine is already about 3 dB down. A published rule of thumb is at least three times the highest sine you care about, and a sample rate of about 2.5 times that bandwidth. The headline rate is often for one channel only. Battery power does not isolate the inputs. Assume a common ground unless the manual says each channel floats. A lone voltage is not a measurement category. Those checks are in the [handheld oscilloscope buying guide](/hub/measuring-equipment/oscilloscope-hand/sub/oscilloscope-hand-buying-guide). UK mains are 230 V. Live work is restricted where danger may arise. A pocket screen is not a rated instrument for a consumer unit.
A handheld oscilloscope is a battery instrument with its own screen. You use it to draw voltage against time when a multimeter number is not enough.
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Personal buying guide
Question 1 of 2
How many traces do you need?
The BSIDE O2 at £79.99 states two channels, 50 MHz, 250 MS/s, 128 K of memory, a 3.98 inch colour resistive touch screen, and a generator with sine, square, half, full, triangle, ramp and DC. The battery bullet says 3,000 mAh and more than 10 hours. The box lists one BNC probe, eight colour rings, a charge cable, a case and a screwdriver, so a second trace still needs another probe. It shows 5.0 from 9 reviews, and the five texts in the file are from the United Kingdom. Praise covers the screen, the grip and the generator. One buyer could not get single or normal trigger to fire until a firmware update, and the manual did not make support easy to find. It does not state isolated inputs or a CAT rating. In this set it is the top pick when you need two channels and will buy the missing probe.
Pros
Cons
Best for: You want two channels and a generator at £79.99, and you will add a second probe.
Less suitable: You need two probes in the box, isolated inputs, or a large review sample.
Specifications
Common questions
How many probes are listed for the BSIDE O2?
The package bullet lists one BNC probe, eight colour rings, a charging cable, a case and a screwdriver. The scope itself is described as two-channel.
What can the BSIDE O2 signal generator output?
The bullet names sine, square, half, full, triangle, ramp and DC, with frequency, amplitude and duty cycle adjustable.
Does the BSIDE O2 touch screen work with gloves?
The bullet says the resistive touch screen can be used with fingers, including gloves, or with a stick or a pencil. A side wheel is also fitted.
This BSIDE OT5 is £59.99 and states 50 MHz, 200 MS/s, 128 Kb, ±400 V, a 3.2 inch colour screen, and an interface that includes English. The battery bullet says 1,200 mAh and more than 8 hours. The box lists one BNC probe, four colour rings, a charge cable, a case and a screwdriver, and it does not list an alligator lead. It shows 5.0 from 1 review, from the United Kingdom. That reviewer wanted a single channel and was glad to leave a heavy bench scope. One review is not a sample. The attribute line that says a minimum operating voltage of 400 V matches the range claim, and there is no CAT rating. Twenty pounds more than the OT3 buys the higher megahertz figure on the same small screen.
Pros
Cons
Best for: You already know you want this 50 MHz claim and one channel, and you accept a single review.
Less suitable: You need two traces, an alligator lead in the box, or a review sample larger than one.
Specifications
Common questions
Is the BSIDE OT5 a two-channel scope?
The box lists one BNC probe. The only review says to buy it if a single channel is enough. The listing does not print a channel count.
How does the BSIDE OT5 differ from the OT3 on the listing?
The OT5 bullet says 50 MHz and 200 MS/s. The OT3 bullet says 10 MHz and 48 MS/s. Both claim a 3.2 inch screen and a 1200 mAh battery.
Does the BSIDE OT5 listing include an alligator lead?
No. The OT5 package list has one BNC probe, four colour rings, a cable, a case and a screwdriver. The OT3 list also has an alligator probe.
The ZOYI ZT-703S is £86.50, and the title states a 50 MHz dual-channel scope, 280 MS/s, a 3.5 inch IPS screen, a 25,000-count True RMS meter, a generator and a 3,400 mAh cell, with no hour figure. The bullets omit the kit. Reviewers who received one often describe two probes, meter leads, a case and USB-C, though at least one first delivery arrived with a single probe. The listing line is 4.6 from 310 on amazon.co.uk, and the texts in the file are not labelled United Kingdom, so they are behaviour clues rather than British opinion. Those texts treat the meter as the strong part and the generator as the weak part, with button menus instead of knobs. One reviewer said the display blanks in under 10 minutes. An Amazon specification line names CAT III 1000 V and CAT IV 600 V, and it does not say which socket that covers.
Pros
Cons
Best for: You want the meter as the main tool, with a dual-channel scope in the same hand.
Less suitable: You need United Kingdom review texts, a proven generator, or a CAT rating that names your socket.
Specifications
Common questions
Does the ZOYI ZT-703S listing include a multimeter?
The title says True RMS and 25,000 count, and the measurement-type attribute says multimeter. It does not list temperature. One review says temperature is absent.
Where does the ZOYI ZT-703S CAT rating come from?
It is the Amazon specification-met line: IEC 61010-2-030, CAT III 1000 V and CAT IV 600 V. The saved listing does not say which sockets that covers.
Are the 310 ZOYI ZT-703S reviews United Kingdom reviews?
The 4.6 from 310 is the amazon.co.uk listing line. The review texts saved in the saved listing are not labelled United Kingdom.
This BSIDE OT3 is £39.99 and states 10 MHz, 48 MS/s, 128 Kb of memory, a 3.2 inch colour screen and ±400 V. The battery bullet says 1,200 mAh and more than 8 hours, while Compel’s sheet for the same family says about 7 hours and ±40 V on x1. The box lists a BNC probe, an alligator lead, four colour rings, a charge cable, a case and a screwdriver. It shows 4.6 from 31 reviews, and the seven texts in the file are from the United Kingdom. Buyers used it on a Pico microcontroller, a combi-boiler EMS line and a vehicle LIN signal, and one still called it fiddly and not for professional use. Single reports, which are not a rate, cover a Chinese menu, a calibration mode that shut off after about 20 seconds, and an unreadable battery icon. There is no external trigger and no CAT rating. In this set it is the best value when one 10 MHz trace is enough.
Pros
Cons
Best for: You want a reviewed 10 MHz pocket trace, with a probe and clips, at £39.99.
Less suitable: You need two channels, a 50 MHz claim, or a CAT-rated mains instrument.
Specifications
Common questions
Does the BSIDE OT3 have a colour screen?
Yes. The bullet describes a 3.2 inch colour TFT. The listing weight is 138 g.
What is in the BSIDE OT3 box?
The bullet lists the scope, one BNC probe, one alligator-clip probe, four colour rings, a charging cable, a case and an alignment screwdriver.
Can the BSIDE OT3 store a waveform?
The bullet says a waveform can be saved with one click and viewed on the unit or on a PC. It does not describe a protocol decoder.
The BSIDE OT9 is £149.99 and states two channels, 50 MHz, 250 MS/s, 128 Kb, a 4.3 inch touch screen, a 20,000-count meter and an eight-waveform generator. The box lists two BNC probes, an alligator probe, meter leads, a thermocouple, colour rings, a charge cable, a bag and a screwdriver. The cell is 3,000 mAh, and hours are not stated. The scope bullet claims ±4000 V, and the meter claims up to 1,000 V DC and 750 V AC, with no CAT mark in the saved listing. The file has no customer-review line. The date first available in that file is 16 July 2026. A missing review line is not a quality score, and a voltage in the title is not a rating for a consumer unit. It is the fullest kit in this set, and it is still a 50 MHz claim.
Pros
Cons
Best for: You want two probes and a meter in the box, and you can accept a listing with no reviews yet.
Less suitable: You need United Kingdom reviews, or a CAT mark that names the socket you will use.
Specifications
Common questions
Are two probes included with the BSIDE OT9?
Yes. The bullet lists two BNC probes, one alligator probe, a pair of meter leads, a thermocouple, a charging cable and a zipped bag.
What does the BSIDE OT9 multimeter claim to measure?
The bullet says 20,000 counts, 1 to 10 A AC/DC, up to 1000 V DC, up to 750 V AC, plus resistance, continuity, diode, capacitance and temperature.
Is there a review score for the BSIDE OT9?
The saved listing has no customer-review line. The date first available in that file is 16 July 2026.
The listing sold as an FNIRSI DSO152 is £25.19 and states 200 kHz bandwidth, a 2.5 MS/s sample rate, a 2.8 inch screen at 320 × 240, and auto, normal and single trigger. The brand field on the page is RiseNova. The bullet claims a built-in 1,000 mAh cell, about 4 hours, USB-C charging and one-button auto. The package line lists one assembled unit. A probe, a case and a manual are not named. The saved listing has no customer-review line, so there is no United Kingdom text that shows a real job. The bullet weight is 100 g and the attribute says 170 g, and the two size lines also disagree. In this set it only fits a signal slower than 200 kHz when you already own a probe. It states no CAT rating.
Pros
Cons
Best for: You only need a very slow waveform and you already have a suitable probe.
Less suitable: You need more than 200 kHz, a probe in the box, or any United Kingdom review of this ASIN.
Specifications
Common questions
What bandwidth does the DSO152 listing claim?
The title and the bullet say 200 kHz, with a 2.5 MS/s sampling rate. That is far below the 10 MHz and 50 MHz models in this set.
Is a probe in the DSO152 box?
The bullet lists one assembled unit and says no assembly is required. A probe, a case and a manual are not named.
How long does the DSO152 battery claim to last?
The bullet says a built-in 1000 mAh cell and about 4 hours of continuous use. There is no review line in the saved listing.
Six handheld oscilloscope listings on amazon.co.uk were scored on 21 October 2026 from the listing and the review file, not from a bench measurement. Amazon stars, cut hard when the sample is one review, there is no review line, or the texts are not from the United Kingdom, weigh 25. Stated bandwidth, sample rate and channel count, including whether a probe is listed, weigh 35. Review sentiment on trigger, battery, menus and a named job weighs 25. Shelf price in GBP against the bandwidth and the kit the listing prints weighs 15. Deductions cover a 200 kHz claim with no probe, a 5.0 from one review or no review line, review texts that are not labelled United Kingdom, a two-channel claim with one probe, trigger that needed firmware, a lone voltage with no CAT mark, and a CAT line that does not name the socket. The 0–100 score is not a measured bandwidth.
Amazon evidence
25%Up to 25 points from the amazon.co.uk star line, cut hard when the sample is one review, there is no review line, or the texts in the file are not from the United Kingdom. The 4.6 from 310 stays a listing line and is not read as British opinion.
Bandwidth, channels and probes
35%Up to 35 points for the stated bandwidth, sample rate and channel count, including whether a probe is actually listed. A 200 kHz claim with no probe, or two channels with one BNC probe, scores lower.
Review notes on the job
25%Up to 25 points from review sentiment on trigger, battery, menus and a named job. Firmware before single or normal trigger works, and a menu called fiddly, are deductions. No review text scores nothing here.
Price against the kit
15%Up to 15 points for the shelf price in GBP against the bandwidth and the kit that listing prints. The lowest shelf price is not the best value when the bandwidth is 200 kHz and the probe is not listed.
Start with the signal, then the probes in the box, then whether the grounds are common, then the input rating, then price against that kit. The notes below follow that order. None of the scores is a laboratory test.
A handheld oscilloscope is a battery instrument with its own screen. It draws voltage against time when a single multimeter number is not enough. UK buyers in this category are hobbyists, students, and people doing light field work or a 12 V vehicle check. A USB scope that needs a computer, and a mains bench scope, are different products and sit outside this comparison. Nothing here was measured on a bench. Prices, stars and review counts are the amazon.co.uk listing lines.
Bandwidth is where a sine is already about 3 dB down. A 200 kHz claim cannot do the jobs a 10 MHz or 50 MHz listing is sold for. The headline sample rate is often for one channel only.
A cell lets you carry the screen. It does not float the inputs. Assume a common ground unless the manual states an isolation rating for each channel. Lifting an earth to float a scope is discouraged.
±400 V or ±4000 V without a category is not CAT II, III or IV. A category without a voltage is incomplete, and a specification line that does not name the socket is not a rating for every socket. One probe in a two-channel box is still one probe.
Bandwidth is the point where a sine is already about 3 dB down, so the largest number in a title is not the signal you can trust. Published handheld guidance asks for at least three times the highest sine you care about, and about five times a digital clock if the edge matters. A separate buyer’s guide asks for a sample rate of at least about 2.5 times the bandwidth, and warns that the headline rate is often one channel only.
A battery does not isolate the inputs. Assume the grounds are common unless the manual says each channel floats to a stated rating. HSE INDG354 says a typical scope ties signal common to the chassis, and it discourages lifting the earth to float the instrument. For a 12 V sensor on a common-ground handheld, the ground clip goes on battery negative. Ignition spikes, hybrid and EV traction systems, and any plan that needs a floated scope are a professional job.
Three typical situations, each with a recommendation from this comparison.
You want one reviewed trace and a probe in the box. The BSIDE OT3 is about £39.99 and states 10 MHz and 48 MS/s, with 4.6 from 31 reviews. United Kingdom notes name a microcontroller, a boiler line and a LIN signal. It is one channel, with no CAT rating beside ±400 V.
You want two channels in one hand and you will buy the missing probe. The BSIDE O2 is about £79.99 and states 50 MHz, 250 MS/s and seven waveforms. The box lists one BNC probe. The line is 5.0 from 9, and one buyer needed firmware before single and normal trigger worked.
You want the meter as the main tool. The ZOYI ZT-703S is about £86.50. The title states a dual-channel 50 MHz scope, 280 MS/s and a 25,000-count True RMS meter. The listing line is 4.6 from 310. The texts in the file are not labelled United Kingdom, and they call the generator the weak function.
In this set the top pick is the BSIDE O2 at about £79.99. It states two channels, 50 MHz, 250 MS/s, a seven-waveform generator and a 3.98 inch touch screen, with 5.0 from 9 United Kingdom reviews. The box lists one probe, and one buyer needed firmware before single and normal trigger worked. The best value is the BSIDE OT3 at about £39.99: 10 MHz, 48 MS/s, a probe and an alligator lead, and 4.6 from 31 reviews with United Kingdom texts. The listing at about £25.19 does not take that place, because 200 kHz and a missing probe are not the better buy for the jobs in this set. None of these scores is a lab test.
BSIDE O2
Highest score: two stated channels, 50 MHz, 250 MS/s, a seven-waveform generator and United Kingdom texts at about £79.99. One probe in the box and nine reviews keep the score at 74.
BSIDE OT3
Best value at about £39.99 for 10 MHz, a probe and an alligator lead, with 4.6 from 31 and United Kingdom texts. A 200 kHz listing with no probe is not the better buy.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources from the research digest, last checked on 21 October 2026. Shelf prices and star lines are the amazon.co.uk figures captured with these six listings. The price bands are this set, not a market average.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the UK listings checked on 21 October 2026. We did not lab-test these handheld oscilloscopes.
