BBy Bikram Nath·Researched from UK Amazon listings·Updated 2026-10-25·6 products compared
Disclosure: As an Amazon Associate I earn from qualifying purchases. This guide contains Amazon affiliate links, and we may earn a commission — at no extra cost to you — but it never changes our rankings.
What are the best multimeters to buy in the UK?
Our top pick for Multimeters in the UK is the AstroAI TRMS 6000 Counts Digital Multimeter with Auto-Ranging, CAT III 600V.
The AstroAI TRMS 6000 Counts suits the automotive and household electrical troubleshooting its listing names: the listing states CAT III 600V, True RMS, auto-ranging, 6000 counts and measurement of AC/DC current and voltage, capacitance, frequency and temperature.
The AstroAI TRMS 6000 Counts digital multimeter is our top pick because its listing states a CAT III 600V rating, True RMS for AC current and voltage, auto-ranging and measurement of current, voltage, capacitance, frequency, duty cycle, resistance and temperature. The AstroAI MUS4KRD and the TESMEN TM-510 list smart modes that pick the measurement without range selection; for AC and DC current through a clamp, the KAIWEETS KC604 lists 400 A AC/DC and IEC61010-1 and CAT III 600V certification.
This guide compares six multimeters from AstroAI, UNI-T, KAIWEETS, TESMEN and Elitech, four digital multimeters and two clamp meters, using what each listing states: measurements, display counts, voltage and current ranges, True RMS, CAT rating and warranty. Stated display counts run from 4000 on the AstroAI MUS4KRD and TESMEN TM-510 to 6000 on the AstroAI TRMS 6000 Counts and UNI-T UT89X.
Buying guide
What should you look for in Multimeters?
1CAT rating: the AstroAI TRMS 6000 Counts lists CAT III 600V, the KAIWEETS KC604 IEC61010-1 and CAT III 600V, and the Elitech CM-110AC CAT III 600V / CAT II 1000V. The AstroAI MUS4KRD and TESMEN TM-510 list CAT II 600V with CE and RoHS. The UNI-T UT89X listing states no CAT rating.
2Measurements: the AstroAI TRMS 6000 Counts lists AC/DC current, AC/DC voltage, capacitance, frequency, duty cycle, resistance, diode, continuity and temperature; the UNI-T UT89X title names voltage, current, temperature and conductance. The AstroAI MUS4KRD and TESMEN TM-510 name AC/DC voltage, resistance and continuity and do not mention current.
3Ranges: the UNI-T UT89X states 1000V AC/DC and 20A AC/DC; the KAIWEETS KC604 400 A AC/DC current and 600 V AC/DC voltage; the Elitech CM-110AC AC current up to 1000A and AC/DC voltage up to 1000V. The AstroAI and TESMEN listings give no voltage or current measuring ranges; the AstroAI TRMS 6000 Counts names F400mA/600V and F10A/600V fuses.
4True RMS and counts: True RMS is listed on the AstroAI TRMS 6000 Counts, UNI-T UT89X, KAIWEETS KC604 and Elitech CM-110AC. Display counts are 6000 on the AstroAI TRMS and the UNI-T, and 4000 on the AstroAI MUS4KRD and the TESMEN TM-510; the KAIWEETS KC604 and Elitech listings state none.
5Warranty: the UNI-T UT89X lists a 30 days warranty, and KAIWEETS says it provides 36 months of service and lifetime technical support but does not call this a warranty. The AstroAI, TESMEN and Elitech listings state no warranty term.
Our process
How do we choose our picks?
We don’t lab-test products ourselves. Instead we synthesise current Amazon UK listings and published specs into clear, honest recommendations. We earn a commission if you buy through our links, but that never changes which products we rank.
Current UK availability
We check each pick against live Amazon UK catalogue data rather than last year’s model lists. Stock moves fast, so a listing can sell out after we publish.
Published specs
We compare manufacturer specifications so each pick is right for a real budget and use-case.
UK-specific fit
We factor in UK voltage and plug/fitting standards — details that generic global lists miss.
AC/DC voltage, resistance, continuity; non-contact voltage detection for 0.5V-600V AC
AC/DC voltage, resistance, continuity; non-contact voltage
AC current (clamp), AC/DC voltage, resistance, capacitance, frequency, temperature, diode…
CAT Rating
CAT III 600V
—
IEC61010-1 and CAT III 600V
CAT II 600V; CE certification and RoHS
CAT II 600V, CE and RoHS certified
CAT III 600V / CAT II 1000V
Ranging
Auto-ranging
—
Auto-ranging
Smart mode: identifies the measurement without range or mode selection
Smart Auto Mode; auto-ranging
Auto-ranging
Counts
6000
6000
—
4000
4000
—
True RMS
Yes, for AC current and voltage
Yes
Yes
—
—
Yes
Voltage
—
1000V AC/DC
600 V AC/DC
—
—
Up to 1000V AC/DC
Current
—
20A AC/DC
400 A AC/DC (clamp)
—
—
Up to 1000A AC (clamp)
The rankings
The best Multimeters, ranked
1
AstroAI
Top Pick
AstroAI TRMS 6000 Counts Digital Multimeter with Auto-Ranging, CAT III 600V
The AstroAI TRMS 6000 Counts suits the automotive and household electrical troubleshooting its listing names: the listing states CAT III 600V, True RMS, auto-ranging, 6000 counts and measurement of AC/DC current and voltage, capacitance, frequency and temperature.
UNI-T UT89X True RMS Digital Multimeter, 1000V 20A
The UNI-T UT89X suits buyers who want 1000V AC/DC and 20A AC/DC ranges: the listing states True RMS, 6000 count, dual range NCV and an included k-type temperature probe, with a 30 days warranty and no stated CAT rating.
Measures
AC/DC voltage, AC/DC current, temperature, conductance; dual range NCV
Counts
6000
Voltage
1000V AC/DC
Current
20A AC/DC
True RMS
Yes
Warranty
30 days
What we like
+States 1000V AC/DC and 20A AC/DC, with True RMS and 6000 count
+Dual range NCV, which the listing says identifies neutral and live wires through light intensity
+Size and weight stated: 189mm x 89mm x 53mm and 345g; the listing also names 1m drop proof, a flashlight and auto backlight
+Comes with batteries, test lead, a k-type temperature probe and an English manual
Worth noting
–30 days warranty
–The listing states no CAT rating
–The listing does not mention auto-ranging
£65.00Amazon.co.uk price as of 03 Nov, 18:00 (London time). Details
KAIWEETS KC604 AC/DC Clamp Meter with D-Shaped Jaw
The KAIWEETS KC604 suits buyers who want a clamp meter for AC and DC current: the listing states 400 A AC/DC, 600 V AC/DC, True RMS, LowZ and IEC61010-1 and CAT III 600V certification, with temperature leads included.
+Passed IEC61010-1 and CAT III 600V certification, per the listing
+LowZ, which the listing says prevents false measurements caused by phantom voltage, and a Low Pass Filter for frequency measurement on motors and transformers
+The screen turns orange as a warning when the voltage is above 80V or the current above 1A
+Comes with a carry case, a manual, a thermocouple and two sets of leads for electrical and temperature work
Worth noting
–The jaw opens to a maximum of 2.8cm
–The listing does not state a display count
£35.99Amazon.co.uk price as of 03 Nov, 18:00 (London time). Details
AstroAI MUS4KRD Auto Ranging Multimeter with NCV, 4000 Counts
The AstroAI MUS4KRD suits home users who want the meter to pick the measurement: the listing says it identifies AC/DC voltage, resistance and continuity without range or mode selection, with ±1% basic accuracy, NCV and CAT II 600V.
Measures
AC/DC voltage, resistance, continuity; non-contact voltage detection for 0.5V-600V AC
Counts
4000
CAT Rating
CAT II 600V; CE certification and RoHS
Ranging
Smart mode: identifies the measurement without range or mode selection
What we like
+States ±1% basic accuracy
+Smart mode identifies AC/DC voltage, resistance and continuity without manual range or mode selection, per the listing
+Non-contact voltage detection for 0.5V-600V AC lines with sound and light warnings
+Kit includes test leads, two pre-installed AAA batteries, a storage bag and a user manual
Worth noting
–The listing names AC/DC voltage, resistance and continuity and does not mention current measurement
–The listing states no warranty term
£15.99£16.99−6%Amazon.co.uk price as of 03 Nov, 18:00 (London time). Details
TESMEN TM-510 Digital Multimeter, 4000 Counts, Smart Measurement
The TESMEN TM-510 suits the amateurs, car owners and homeowners its listing names: Smart Auto Mode for AC/DC voltage, resistance and continuity, non-contact voltage with an alarm, 4000 counts and CAT II 600V.
Measures
AC/DC voltage, resistance, continuity; non-contact voltage
Counts
4000
CAT Rating
CAT II 600V, CE and RoHS certified
Ranging
Smart Auto Mode; auto-ranging
What we like
+Smart Auto Mode switches between AC/DC voltage, resistance and continuity without selecting a mode or range, per the listing
+Non-contact voltage test with a visual and audible alarm
+Data hold, automatic shutdown, a low battery indicator, a backlight and a flashlight
+Comes with 2 test leads, a storage bag and 2 AAA batteries
Worth noting
–The listing does not mention current measurement
–The listing states no warranty term
£16.99Amazon.co.uk price as of 03 Nov, 18:00 (London time). Details
Elitech CM-110AC Digital Clamp Meter, 1000A AC, 1000V AC/DC
The Elitech CM-110AC suits the HVAC technicians and electricians its listing names: AC current up to 1000A through the clamp, AC/DC voltage up to 1000V, True RMS, NCV and a CAT III 600V / CAT II 1000V rating.
Measures
AC current (clamp), AC/DC voltage, resistance, capacitance, frequency, temperature, diode, continuity; NCV
Voltage
Up to 1000V AC/DC
Current
Up to 1000A AC (clamp)
CAT Rating
CAT III 600V / CAT II 1000V
True RMS
Yes
Ranging
Auto-ranging
What we like
+AC current up to 1000A through the clamp without breaking circuits, per the listing
+AC/DC voltage up to 1000V, with True RMS
+CAT III 600V / CAT II 1000V safety rating, per the listing
+MAX/MIN recording, relative measurement, data hold and auto power-off
Worth noting
–The clamp measures AC current; the listing does not mention DC current
–The listing states no warranty term, display count or dimensions
View on Amazon UKAmazon UK shows no offer for this product as of 03 Nov, 18:00 (London time). Details
Product prices and availability are accurate as of 03 Nov, 18:00 (London time) and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Editor's Note
Three listings pair True RMS with a stated CAT III rating: the AstroAI TRMS 6000 Counts, the KAIWEETS KC604 and the Elitech CM-110AC. The UNI-T UT89X states True RMS and 6000 count but no CAT rating, and its 30 days is the one warranty term these listings state; KAIWEETS describes 36 months of service. The AstroAI MUS4KRD and TESMEN TM-510 listings do not mention current measurement.
Our Take
As a default, pick the AstroAI TRMS 6000 Counts: CAT III 600V, True RMS, auto-ranging and measurement of AC/DC current and voltage, capacitance, frequency and temperature on the listing. The AstroAI MUS4KRD lists a smart mode that needs no range or mode selection and ±1% basic accuracy; for AC and DC current through a clamp, the KAIWEETS KC604 lists 400 A AC/DC and CAT III 600V.
Questions & answers
Frequently asked questions
Which multimeters pick the range for you?
The AstroAI MUS4KRD and TESMEN TM-510 list smart modes that identify AC/DC voltage, resistance and continuity without selecting a mode or range. The AstroAI TRMS 6000 Counts, KAIWEETS KC604 and Elitech CM-110AC list auto-ranging; the UNI-T UT89X listing does not mention it.
Which multimeters have a CAT III rating?
The AstroAI TRMS 6000 Counts lists CAT III 600V, the KAIWEETS KC604 IEC61010-1 and CAT III 600V, and the Elitech CM-110AC CAT III 600V / CAT II 1000V. The AstroAI MUS4KRD and TESMEN TM-510 list CAT II 600V, and the UNI-T UT89X listing states no CAT rating.
Which multimeters measure True RMS?
The AstroAI TRMS 6000 Counts, UNI-T UT89X, KAIWEETS KC604 and Elitech CM-110AC list True RMS. The AstroAI MUS4KRD and TESMEN TM-510 listings do not mention it.
Which multimeters measure current?
The UNI-T UT89X lists 20A AC/DC and the AstroAI TRMS 6000 Counts AC/DC current; the KAIWEETS KC604 clamp lists 400 A AC/DC and the Elitech CM-110AC clamp AC current up to 1000A. The AstroAI MUS4KRD and TESMEN TM-510 listings name voltage, resistance and continuity and do not mention current.
What comes in a digital multimeter kit?
The AstroAI MUS4KRD kit lists the multimeter, test leads, two pre-installed AAA batteries, a storage bag and a user manual, and the TESMEN TM-510 the multimeter, 2 test leads, a storage bag, 2 AAA batteries and a user manual. The UNI-T UT89X comes with batteries, test lead, a k-type temperature probe and an English manual, and the KAIWEETS KC604 with a carry case, a manual and two sets of leads.
Which multimeters detect live wires without contact?
The UNI-T UT89X lists a dual range NCV test, the AstroAI MUS4KRD non-contact detection for 0.5V-600V AC lines and the TESMEN TM-510 a non-contact voltage test with a visual and audible alarm. The KAIWEETS KC604 and Elitech CM-110AC clamps also list NCV; the AstroAI TRMS 6000 Counts listing does not mention it.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. UKPicks earns a small commission from qualifying purchases made via links on this page. This does not affect our editorial recommendations or the price you pay.
