New version · CAT III 1500 V
C128PRO
CAT III
Reach higher. See the measurement.
1500 V DC for photovoltaics. 1000 A AC/DC through the jaws. Up to 3000 A AC with the optional FLEXC128 flexible sensor.
01 / Photovoltaics / Electrical / Maintenance
Measure where energy flows.
From photovoltaic DC voltages to AC/DC currents: a TRMS clamp meter with a backlit display, LED work light and field diagnostic functions.
CAT III 1500 V / CAT IV 600 V

02 / TRMS · VFD · INRUSH
Read the signal. Capture the inrush.
The 400 Hz VFD low-pass filter, 100 ms InRush measurement and MAX/MIN and REL functions help observe electrical behaviour. HOLD keeps the reading on screen.
TRMS
True RMS AC voltage and current measurement.
InRush · 100 ms
Capture starting current.
VFD / LPF
Low-pass filter with a 400 Hz cut-off frequency.
6000 counts
2-inch LCD, backlight and bargraph.
03 / Optional accessory / FLEXC128
Open up the range. Up to 3000 A AC.
The flexible Rogowski sensor connects to the C128PRO CAT III inputs: current and frequency appear directly on the display. Three selectable ranges: 30, 300 and 3000 A AC.
- Loop inner diameter: 150 mm
- Connection cable: 1 m
- CAT III 1000 V · CAT IV 600 V
FLEXC128 measures alternating current only and is an optional accessory. Its measurement category differs from the clamp meter’s.

C128PRO CAT III / DESIGN
Every angle.




04 / C128PRO CAT III
Technical specifications.
Data from the Italian V1.3 user manual. Accuracy is expressed as ± (% of reading + digits).
| Measurement / function | Range / value | Accuracy / detail |
|---|---|---|
| Clamp meter category | CAT III 1500 V / CAT IV 600 V | CAT III 1500 V · CAT IV 600 V |
| DC voltage | 6 / 60 / 600 / 1500 V | ± (0.5% + 5) |
| TRMS AC voltage | 6 / 60 / 600 / 1000 V | ± (0.8% + 5) up to 600 V; ± (1% + 5) at 1000 V |
| AC/DC current | 60 / 600 / 1000 A | ± (2% + 5); AC: 45–1000 Hz |
| AC current with FLEXC128 | 30 / 300 / 3000 A AC | ± (2.5% + 8) at 3000 A; optional sensor |
| Frequency | 10 Hz–10 kHz | ± (1% + 5) |
| Duty cycle | 1–99% | ± (3% + 2) |
| Resistance | 600 Ω–60 MΩ | ± (1% + 3) up to 6 MΩ; ± (1.2% + 30) at 60 MΩ |
| Capacitance | 60 nF–60 mF | ± (4% + 3) up to 6 mF; ± (5% + 5) at 60 mF |
| Temperature | −20…1000 °C | ± (2% + 2); type K probe |
| Continuity / diode | 50 Ω / 3.3 V | Buzzer below 50 Ω / diode test |
| Jaw opening | 48.5 mm | Centre the conductor in the jaws |
| Display | 6000 | 2-inch backlit LCD · bargraph |
| Enclosure protection | IP54 | IP54 |
| Dimensions / weight | 273 × 68 × 43 mm / 490 g | 273 × 68 × 43 mm · 490 g |
| Power supply | 3 × AAA 1.5 V | 3 × 1.5 V AAA batteries · approx. 60 hours |
| Operating environment | −10…50 °C | −10…50 °C · maximum altitude 2000 m |
A measurement range does not extend accessory ratings. Use leads, cables and probes suitable for the circuit voltage and category; the lowest rating in the assembly applies.
UNIKS / C128PRO CAT III
Ready for everyday work.
The manual lists detachable probes and leads, a carrying bag, a type K temperature probe and three AAA batteries. FLEXC128 is optional.
05 / DOWNLOAD
Manuals and documentation.
Original Italian manual and working translations into English and German. Translations are drafts requiring technical validation before operational use.
C128PRO / C128PRO CAT III
Two versions. One family.
The current C128PRO remains in the range. C128PRO CAT III identifies the new version rated CAT III 1500 V with a FLEXC128 input.