We specialize in Current Sensors, CT Sensors, and Measuring Instruments.

Earth Resistance Clamp Tester

MET-1 Clamp Earth Tester34mmφCT, AC leakage current, Ω

Simple earth resistance measurements without auxiliary spikes and test leads.


Test frequencies are selected automatically to minimize erroneous measurements.
Earth resistance measurements for single and multi earthing systems.
Leakage current and load current measurements with 200mA, 2000mA and 10A ranges.
Data hold and auto power off function.
200Ω earth resistance range.

0 available in stock as of July 19, 2019

Withstanding Voltage AC 3700V, 1 minute( between CT core and CT handle)
Insulation Resistance More than 100MΩ (between CT core and CT handle)
Storage Temperature -10℃~60℃, < 80% (without condensation)
Size and Weight Measuring CT:90.5(W)×165(H)×38(D)mm, approx.460g
Injection CT:90.5(W)×165(H)×38(D)mm, approx.440g
Main unit:190(W)×140(H)×42 (D)mm, approx.800g
Operating Temperature 0℃~40℃, < 85%RH ( without condensation)
Power supply NiMH battery pack (1.2V x 5)
Safety standard IEC 61010-1, IEC61010-2-032
Installation CAT II 600V or CATⅢ 300V
Limitation of circuit voltage Less than 600V
Accessories Measuring CT:1
Injection CT:1
Battery charger:1
Carrying case:1
Instruction manual:1
Display LCD, 16 letters/characters × 2 lines
with contrast adjuster
Optional accessory Subsidiary lead wire
Measuring function Earth Resistance, AC Current (Load and Leakage)
A/D Conversion Dual slope integration mode
Over range indication "OVER" on LCD
Data hold indication "DH" mark on LCD
Low battery indication "B" mark on LCD
Battery life 450 times measurements under full charged condition
(Subject to the times of charging and discharging)
Sampling Approx. 2 times/sec. for AC current
Auto power off function Approx. 5 minutes after power on
Measuring time Approx. 30 second for earth resistance
Accuracy(Earth resistance) (23℃ ± 5℃, 85% or less)
200Ω/0.1Ω/0 ~ 10Ω : ±0.2Ω、10 ~ 50Ω : ±1.0Ω、50 ~200Ω : ±5.0Ω
Accuracy(AC current) (23℃ ± 5℃, 85% or less)
200mA/0.1mA/2% rdg ± 8dgt
2000mA/1.0mA/2% rdg ± 8dgt
20A/0.01mA/2% rdg ± 8dgt
Measuring CT φ34mm with 2.5m lead
Injection CT φ34mm with 2.5m lead
Injection signal Approx. 320mVp-p, Auto sweep 4KHz~400KHz
Battery charger AC200V~240V (50/60Hz)