Precision Tools
for Professional
Measurement

IEC 61010 measurement category ratings define the overvoltage transient protection level of a meter. CAT II covers single-phase receptacle loads and portable equipment. CAT III covers fixed equipment in buildings, distribution panels, and bus bars. CAT IV covers the point of connection to the utility supply — including outdoor conductors and service entrance. Higher categories indicate protection against more severe transient overvoltages.

Standard average-responding meters give accurate readings only on pure sinusoidal waveforms. In industrial environments with variable-frequency drives, switched-mode power supplies, and non-linear loads, the waveform is often distorted. True RMS meters measure the actual heating effect of the current or voltage, giving correct readings regardless of waveform shape. For professional electrical work, True RMS measurement is a practical necessity.

Key specifications to consider include detector resolution (pixel count), thermal sensitivity (NETD), and temperature range. For electrical inspection, a sensitivity of 50 mK or better allows subtle hot-spot detection. Ensure the lens field-of-view and spatial resolution (IFOV) are appropriate for the target size and working distance. Features such as emissivity adjustment and isotherm tools aid interpretation.

Yes. You can reach us via the contact form on this site or by email at [email protected]. Our technical team can assist with equipment selection, specification comparison, and application-specific guidance. Response is typically within one business day.

Yes. While based in Eindhoven, Fluke Promotions works with industrial and commercial customers internationally. Our primary market is B2B, and we serve engineering firms, utilities, maintenance departments, and electrical contractors across Europe and beyond.

The articles, guides, and comparisons on this site are provided for informational purposes. They describe general principles and product characteristics based on publicly available technical information. For specific safety-critical applications, always consult the relevant manufacturer documentation and applicable local regulations or standards.