Inductance Meters

GAOTek Inductance Meter is a type of electronic test equipment used to measure the inductance of an electronic component. In the simpler versions of this instrument the impedance was measured internally and converted for display to the corresponding inductance value.

The device under test (DUT) is usually subjected to an AC voltage source. The meter measures the voltage and the current through the device. By calculating the ratio of these the meter can determine the magnitude of impedence. The more advanced type of Inductance meters can measure the phase angle between the voltage and current. In combination with the impedence, the equivalent inductance and the resistance can be calculated and displayed. The meter must assume either a parallel or a series model for these two elements.

The real capacitors have a little inductance and resistance due to leakage. Likewise, resistors can have inductance and capacitance because of the way they are built. The most useful assumption, is that LR measurements have the elements in series (as is necessarily the case in an inductor’s coil) and that CR measurements have the elements in parallel (as is necessarily the case between a capacitor’s ‘plates’). Leakage is a special case in capacitors, as the leakage is necessarily across the capacitor plates, that is, in series.


GAOTek Inductance meter can also be used to measure the inductance variation with respect to the rotor position in permanent magnet machines.

Handheld LCR meters typically have selectable test frequencies ranging from 100 Hz, 120 Hz, 1 kHz, 10 kHz, and 100 kHz for top end meters. The display resolution and measurement range capability will vary depending on the applied test frequency as the circuit is more sensitive or less for a given component which is an inductor or capacitor will typically change with the applied test frequency.

Some Techniques Used with LCR meters:

·       Bridge Method

·       Current-Voltage Technique


GAOTek Inductance Meters include following features listed below:

Automated identification:

With the automated identification testing feature the measuring experience is easy. It eliminates unnecessary trial and error time—with just a single push of a button. This unique feature automatically specifies L, C, or R with parallel and series mode, without the need to manually change buttons.

Detailed component analysis :

The handheld LCR meters allows you to test various component types, including secondary components of Dissipation Factor (D), Quality Factor (Q), and Angle Indication of Impedance (θ). This new handheld series also includes other functions that result in a more detailed component analysis. DCR is a built-in DC resistance measurement that eliminates the use of a separate digital multimeter (DMM) for component test.

Frequency up to 100 kHz :

As the frequency is up to 100 kHz, the user has a more flexibility to test a wider range of components. A high frequency test is useful for applications such as testing aluminum electrolytic capacitors used in switching power supply circuits.

Swept Measurements: 

Fast and accurate swept parameter measurements, graphical or tabular, for verification of component and material response to changes in ac test frequency, ac test voltage or ac test current, without the need for complex programming or an external controller.

Automated Test Sequencing :

It can run up to six different tests in sequence with a single push of the start button. Each test can have different conditions and limits.

Some more Features:

  • Detailed component analysis with DCR, ESR, Z, D, Q, Ө functions
  • Battery life of 16 hours/Ac-powered
  • 0.2% accuracy


·       Test & Measurement

·       Maintenance & Repair

·       Actual series resistance

·       Leakage resistance

·       Dielectric loss

They are ideal for applications such as

  • Incoming inspection,
  • Quality control
  • Automated test and measurement
  • Maintenance and Repair
  • Leakage resistance
  • Dielectric loss

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