ZT-703S
-- New ZT-703S Triple-in-One
Measure with absolute
confidence.
Forty years of precision engineering -- distilled into instruments trusted by 200,000 electricians, makers, and engineers worldwide.
CE · CAT III 600 V · Fluke-calibrated · Ships to 60+ countries
New
50 MHz · 3-in-1
Best Sellers
The instruments engineers buy twice.
From everyday handhelds to bench-top 5-in-1s. These are the models our distributors re-order every quarter.
ZT-R02
ZT-5566S
ZT-Y
ZT-X
ZT-QB9
VC-921
ZT-MD2
The Lineup
One brand. Every instrument you need.
From pocket multimeters to industrial clamp meters and triple-in-one oscilloscopes, all engineered in the same factory since 1983.
Who Uses ZOYI
Built for four kinds of hands.
Different jobs, different priorities. Every product line is designed for one of these four users. Never trying to be everything at once.
Field Maintenance
Climbing poles, crawling under panels, chasing intermittent faults. You need a meter that survives the truck and reads true-RMS on dirty waveforms.
ZT-Y · ZT-QB9 · ZT-550B+
Education & Training
Forty students, one teacher, one budget. Predictable readings, big buttons, drop-proof, and cheap enough to replace if a student fries one.
ZT-100 · ZT-102 · ZT-A2
Industrial & R&D
Bench work needs accuracy. ZT-5566S logs to Bluetooth, ZT-703S captures 50 MHz waveforms, ZT-MD2 picks SMD parts off a reel.
ZT-5566S · ZT-703S · ZT-MD2
Makers & DIY
Pocket size, USB-C charging, one-handed operation. Built for the hobbyist who carries one tool, not seven.
ZT-S1 · VC-921 · ZT-N2
CH1 ZT-703S
1.000 kHz
Featured
ZT-703S Triple-in-One.
A 50 MHz oscilloscope, a 9999-count true-RMS multimeter and a built-in signal generator, in one pocket-size aluminum body.
- Bandwidth50 MHz
- Sample rate250 MS/s
- Counts9 999
- GeneratorSine · Square · Triangle
- BatteryUSB-C · 8 h
- Display3.5″ IPS
Guiyang facility, Line 4
Inside the Factory
In-house from plastic to PCB.
We mold our own housings. We solder our own boards. We calibrate every meter against a Fluke 5520A reference. Every step lives in the same Guiyang facility, which is why our spec sheets are not aspirational.
1983
Year founded
12,000 m²
Manufacturing floor
8
Production lines
36-step
QC checklist per SKU
Why ZOYI
Engineered for the bench. Built for the field.
01 -- PRECISION
0.5% basic accuracy.
Every meter is calibrated against a Fluke 5520A reference before it leaves the factory. Spec sheets are conservative, not aspirational.
02 -- DURABILITY
Drop-tested to 1.5 meters.
Double-molded housings, sealed rotary switches, and silicone bumpers. Designed to survive an electrician's truck, not a lab shelf.
03 -- SAFETY
CAT III 600 V certified.
Independent CE, EMC, and LVD compliance reports for every model. Real fuses, not symbolic ones.
Customer Voices
Two hundred thousand engineers can't all be wrong.
Real notes from the bench, the truck, and the classroom.
I've burned out two Flukes and a Klein in five years. The ZT-Y is on its third year and still reads the same as the day it came out of the box.
Marcus K. -- Field Technician, Atlanta
★★★★★
Bought 30 for our trade school. Two years of student abuse, only one fried fuse to replace. The ZT-100 punches three times its weight.
Prof. Tanaka -- Tokyo Technical College
★★★★★
ZT-703S replaced an oscilloscope, a multimeter, and a function generator on my bench. My desk thanks me, my wallet thanks me.
Andre L. -- Embedded developer, Berlin
★★★★★
Forty years. Eighty products.
Two hundred thousand engineers.
40+
Years in instruments
80
SKUs in production
35
Multimeter models
200K+
Users worldwide
News & Resources
Firmware updates, product launches, technical notes.
Follow what is new, or grab the latest firmware for your meter.
ZT-R02 thermal imaging multimeter ships worldwide.
96×96 vanadium-oxide sensor in a meter you can hold like a probe. First reviews from the field.
Read article →Why your true-RMS reading drifts under VFD load.
A short walk-through of the math, the noise floor, and how ZT-Y compensates with V.F.C. filtering.
Read article →ZT-703S v1.4.2 is out.
Improves trigger stability, adds dual-channel cursor measurement and a math FFT preview.
Download v1.4.2
Compliant & Certified
CE
EMC
LVD
RoHS
FCC
CCC
Need help choosing?
Talk to Tim.
Ship worldwide. Reply within one business day.
Whether you're sourcing 10 meters for a vocational school or 5,000 for a distributor, we'll spec the right model and quote the same day.