PeakTech multimeter buying guide
Updated: 22 October 2026
You are choosing among four PeakTech meters on amazon.co.uk, from £75.18 to £204.17. Two handhelds print CAT IV. Two clamps stop at CAT III 600 V. A PeakTech multimeter buying guide helps only if you match the place and the current method before you compare counts or stars. The [PeakTech multimeter comparison](/hub/measuring-equipment/peaktech-multimeter) holds the table. This page is the order of the decision. The Products Compared editorial team used those listings, scraped on 21 October 2026, and PeakTech’s pages where Amazon leaves a figure blank. We did not run a lab test. A qualifying purchase through our links can earn a commission at no extra cost to you.
You are choosing among four PeakTech meters on amazon.co.uk, from £75.18 to £204.17. Two handhelds print CAT IV. Two clamps stop at CAT III 600 V.
You are choosing among four PeakTech meters on amazon.co.uk, from £75.18 to £204.17. Two handhelds print CAT IV. Two clamps stop at CAT III 600 V. A PeakTech multimeter buying guide helps only if you match the place and the current method before you compare counts or stars. The PeakTech multimeter comparison holds the table. This page is the order of the decision. The Products Compared editorial team used those listings, scraped on 21 October 2026, and PeakTech’s pages where Amazon leaves a figure blank. We did not run a lab test. A qualifying purchase through our links can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Category | Type | Counts | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  PeakTech PeakTech P 3440 | CAT III/IV 1000/600 V | Graphic handheld | 50,000 | 8.0 | about £204.17 | View offer |
| Alternative |  PeakTech PeakTech P 3442 | CAT III/IV 1000/600 V | LCD handheld | Up to 60,000 | 7.6 | about £162.90 | View offer |
| Best value |  PeakTech PeakTech P 4350 | CAT III 600 V | 80 A clamp | 4,000 | 6.7 | about £75.18 | View offer |
On this page
Start with where you will connect it
Read the category and the voltage as one limit. The P 3440 (B01MA3UBJM, £204.17, 4.5 from 260) and the P 3442 (B07DW6PG4P, £162.90, 4.5 from 163) print CAT III 1000 V and CAT IV 600 V. The P 4350 (£75.18, 4.1 from 142) and the P 1650 (£77.70, 4.2 from 88) print CAT III 600 V only. Martindale describes CAT III as distribution and CAT IV as the supply origin, and the leads have to match the meter. Unitest’s buying order states the related mistake: a CAT II meter marked 1000 V is not a safer choice than a CAT III meter marked 600 V. On the P 3440 the title carries CAT III 1000 V, while a separate field says maximum operating voltage 600 volts, so both lines stay visible. The place-by-place map is on the CAT rating page. A clamp whose jaw fits the cable still carries the lower category here, which is why current comes before counts.
Then decide how the current has to be measured
A handheld reads current only after you open the circuit and place the meter in series. Amazon’s bullets for the P 3440 and the P 3442 name AC and DC current and print no ampere ceiling. PeakTech’s pages state 10 A for both, so you keep the maker’s limit beside the blank Amazon field. If the conductor stays closed, you need a jaw. The P 4350 is 80 A AC/DC, with 1 mA resolution up to 5 A and 100 mA resolution up to 80 A, for cables up to 12 mm. The P 1650 title states 400 A AC/DC. The scraped table has no jaw size. PeakTech states 30 mm and prints two conflicting frequency figures, so you should not collapse those into one hertz limit. A cheaper clamp is a different tool, which the clamp or handheld page separates. If you already want a colour logger at a CAT IV point, this check sends you to the P 3440.
Counts, True RMS and the maker’s percentage
Every title here says True RMS, so the phrase does not rank these four. It still matters outside the set. Fluke’s UK note says an average-responding meter can read up to 40% low, or 10% high, when the wave is not a clean sine. Wiha’s UK catalogue draws a similar line between industrial waveforms and a quiet domestic supply. Counts are the next trap. The P 3440 is a 50,000-count colour display. The P 3442 switches up to 60,000 counts. Keysight treats counts as resolution, not as the accuracy figure written ±(% + counts). PeakTech states ±0.05% DC basic accuracy for the P 3440 and ±0.9% for the P 3442. Those are maker claims. Amazon’s titles do not print them, and we have not checked them on a calibrator. For leakage, the P 4350’s 1 mA range matters more than either count, though non-UK reviews say that range can drift until you press relative zero.
Logging, batteries and listing conflicts
Both handhelds state Bluetooth 4.0. The P 3440 adds a colour TFT and an on-meter logger. Its title says a Li-Po 1200 mAh pack, while the INFO line says a 7.4 V Li-Ion battery and a charge adapter whose plug is unstated, so a BS 1363 fit is unconfirmed. One bullet prints P 3340; the model number prints P 3440. The P 3442 adds 4–20 mA%, a low-pass filter and Auto-Hold, on batteries whose size and count Amazon does not give. PeakTech’s June 2022 manual says Bluetooth on the P 3442 starts with a Mode press of about two seconds, and the PC software expects the supplied dongle. A UK review from 7 July 2019 matches that dongle and also reports a certificate and a CD that the INFO line does not list. The P 1650 says electrical (wired) and, in the same block, alkaline batteries included. Its only UK review, 24 June 2026, says the cell arrived flat. The best PeakTech multimeter page then names a job for each listing.
What still sits on the main table
This order will not crown one meter for every job, and it will not turn any of them into an installation tester. BS 7671 regulation 643.1 expects instruments to BS EN 61557 for the tests behind an Electrical Installation Certificate. None of these four is that instrument. Euro prices on peaktech.de exclude VAT and are not the shelf prices £75.18, £77.70, £162.90 and £204.17. Lead packs that appeared in the raw search are not meters. When category, current method and the contradictory fields still leave two candidates, the table is where counts, the case line, Bluetooth and the review sample sit together. Open the PeakTech multimeter comparison for that row.
Common questions
Should I buy the P 3440 or the P 3442?
Buy the P 3440 at £204.17 if you want the colour logger and you can accept a continuity beep a UK review timed at almost a second. Buy the P 3442 at £162.90 if you want 4–20 mA% and a low-pass filter and you do not need that screen. Both print CAT III 1000 V and CAT IV 600 V. PeakTech states 10 A for each, and Amazon prints no ampere limit. The P 3442’s detailed UK sample is one review plus a two-word note.
Do more counts mean a more accurate meter?
Counts are display resolution. The P 3440 shows 50,000 and the P 3442 can show 60,000, which is a smaller step on the screen, not a tighter percentage. PeakTech states ±0.05% DC basic accuracy for the P 3440 and ±0.9% for the P 3442. Amazon’s titles do not print those figures, and we have not verified them. Keysight separates digits from accuracy for the same reason. A higher count is not evidence that the P 3442 is the more accurate meter.
Do I need True RMS if all four already say it?
Inside this basket True RMS is a pass for every listing, so it will not choose between them. It matters when a fifth meter only says average responding. Fluke’s UK note says that kind of meter can read up to 40% low, or 10% high, on a distorted current. Wiha’s UK catalogue treats the gap as wider in industry than on a clean domestic sine. You still cannot rank these four on a phrase they all share.
What does the 600 V field mean beside CAT III 1000 V?
On the P 3440 the title prints CAT III 1000 V and CAT IV 600 V, and a separate amazon.co.uk field says maximum operating voltage 600 volts. Keep both. Category and voltage are one limit, and a lone 1000 V figure does not upgrade the meter. Martindale’s point is that a lower category with a higher voltage is a different transient test. The CAT rating page sets out where each marking sits.
Will Bluetooth work on my laptop without a dongle?
Plan on the supplied dongle for a PC. Both handhelds state Bluetooth 4.0 to a smartphone. PeakTech’s June 2022 manual for the P 3442 says the PC software expects that dongle, and a UK review from 7 July 2019 says the Android app worked while a laptop did not use its own Bluetooth. The INFO line does not list the dongle even though the reviewer reported one. A missing dongle is a gap in the box, not proof the phone link fails.
Can any of these produce an electrical installation certificate?
They cannot stand in for the instrument BS 7671 asks for. Regulation 643.1, as SELECT’s Best Practice Guide 7 sets out, calls for test equipment to BS EN 61557. A CAT IV mark on the P 3440 or P 3442 does not create that tester. Certificate work stays with a competent person and the right instrument. Electricity at Work Regulations 1989, regulation 16, still requires competence or supervision where danger has to be prevented.
Related pages
Sources
Public sources listed in the research digest. Shelf prices and star lines are the amazon.co.uk figures on these four listings. The price bands are this set, not a market average.
- Martindale Electric: measurement categories explained (retrieved 22 October 2026)
- HSE GS38: electrical test equipment for electricians (retrieved 22 October 2026)
- Electricity at Work Regulations 1989, regulation 16 (retrieved 22 October 2026)
- HSE: electrical FAQs (retrieved 22 October 2026)
- SELECT Best Practice Guide 7 (retrieved 22 October 2026)
- Fluke: what is true-RMS (retrieved 22 October 2026)
- PeakTech P 3440 manufacturer page (retrieved 22 October 2026)
- GOV.UK: Electrical Equipment (Safety) Regulations 2016 (retrieved 22 October 2026)