30 A (low amps) current clamp

The TA234 probe is a 30 A current clamp. The extended measuring jaws allow measurement in a confined space. When measuring DC, a simple thumbwheel on the probe allows zero adjustment.

This current clamp is ideally suited for use with PicoScope oscilloscopes and features additional screening to reduce noise pickup.

View Pico's full range of current clamps for use with oscilloscopes and multimeters.

30 A current clamp


Electrical data

Nominal current 30 A AC peak  or DC
Measuring range (s) 30 mA to 30 A DC (accurate)
5 mA to 30 A DC (usable)
Overload capacity 500 A for 60 s
Output sensitivity 100 mV/A
Accuracy ±(2% of reading ± 2 mA)
Resolution ± 1 mA DC after filtering
di/dt tracking capability > 20 A/µs
Conductor position sensitivity ± 1% relative to center
Temperature coefficient 0.1 x specified accuracy/°C
(0 °C to 18 °C, 28 °C to 50 °C)
Frequency range DC to 20 kHz (–0.5 dB)
Battery type 9 V PP3, MN 1604, 6F22, 6LR61
Min. load impedance 1 MΩ

General data

Max. conductor size 19 mm diameter
Output cable and connectors 2 m long coax terminated with safety BNC connector
Operating temperature +5 °C to +40 °C
Storage temperature (excluding battery) –20°C to +70°C
Humidity 0 to 80 %RH
Altitude 0 to 2000 m
Weight 300 g
Dimensions (H x W x D) 200 mm x 72 mm x 38 mm
Pollution degree 2
Safety EN 61010-1:2010
EN 61010-2-032:2012
EMC EN 61326-1:2006
EN 61326-2-2:2006
Environmental RoHS and WEEE compliant

Typical Uses

With a 20 mm extended jaw the TA234 low amps current clamp is ideal for parasitic drain measurements without the need for battery cable disconnection. The clamp also boasts extreme accuracy from 5 mA through to 30 A DC with reduced noise levels so ensuring greater resolution for very low current applications, including:

Parasitic drain measurements
Petrol and diesel injector operation
Solenoid testing
Throttle motor functions
EGR actuator testing
Broadband 02 sensor testing (in conjunction with current multiplier) 

Case studies
Battery discharge
Recently I was faced with a customer who had completely given up on the idea of her car ever being fixed. The lady owner of a 2001 Audi A6 1.8 Turbo, explained to me how she has always had problems with the battery discharging.
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Customer reviews

2 reviews | Add review

Mark Stammers
30 A (low amps) current clamp

I’ve been using this clamp for a few weeks now. Solid perfomance and good build quality. As with all the ‘hall effect’ current clamps, you need to let it warm up a little before relying on it’s low end current readings. I haven’t managed an overnight parasitic draw test yet with it, but I have noticed some drift when it’s only been switced on for maybe half an hour. That’s no different to any others, including my Fluke low amp clamp.
The jaw size is perfect for battery cables etc.. and it’s accuracy is superb, once zero’d.
I think the lowest stable reading is around 5 to 10mA. I’ve checked it against my Fluke ammeter and it’s pretty close.
Nice clamp, well worth the money.

Robert Burgy
30 A (low amps) current clamp

This current clamp is built as good as all clamps sold by
Pico. This is a better alternative to the low amp clamp due
to the increased jaw opening to allow for larger cables.
great for doing key off battery drain.

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