Feeling the need to clamp


After watching Balance Charging: Can you parallel charge?, I realised that I needed a clamp meter. But which one?

I had already purchased a UNI-T UT71D DMM, see Choosing which Multimeter to buy, and I was very happy with it, so the UNI-T clamp meter seemed a logical choice.  Everyone seems to have the UNI-T 210E. However, there are a myriad of other options.

See also

The choices


  • Which UNI-T clamp meter to buy?
    • UT216D, same as UT216C, but with OLED. 60A/600A. Only UT216C has DC, down to 10 mA
    • UT211B – no inrush
    • UT207/208 have inrush and 208 has temp
  • Which uni-t clamp meter is everyone using?
    • UNI-T UT210D – no low current, up to 200A
    • UNI-T UT204
    • UT210E has low current 2A (1mA), only up to 100A, 2000 display counts
    • UT211B – more stable than UT210E, 6000 display counts, worth the exta cost



On eBay:

NKTECH NK210E Digital Clamp Meter Multimeter AC DC Volt AC A Res VS UNI-T UT210E, $13.68

Hacking the UT210E

UT210E – See A look at the Uni-T UT210E for a close up review and how to hack/mod it, so that it becomes a UT211B. See page 8:

UT210E I2C pinout
UT210E I2C pinout



Unfortunately, not many UNI-TREND clamp meters do DC current. The main contenders are:

  • UT216C is the best (features wise), and most expensive, but does not have very low currents (10mA) up to 600A
  • UT210E is very popular, low currents (1 mA) up to 2/20/100A. 2000 display counts
  • UT211B better stability than 210E (1mA) up to 6/60A. 6000 display counts, but twice the price of the UT210E.

So, following the crowd, the smart money is on the UT210E, and hacking it…

Purchasing issues

I encountered two main issues:

  • I have ordered this item twice on eBay, from sellers offering the device for <£20 and both times the item fails to appear
  • Some listings state: ZB-UT210E Clamp Meter. Is this some sort of knock off, even though the images seem legit. ZB stands for ZIBOO, and I’m not sure if this is some sort of rebranding/rebadging.

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