Industrial measurement instruments condition the quality of inspection, regulatory compliance and the reliability of installations. Choosing the right equipment requires understanding accuracy classes and certifications.
Key points
- Main criteria are the measured quantity, accuracy, robustness and certification.
- EN 61010 defines multimeter safety (categories CAT I to CAT IV).
- Fluke, Keysight, Rohde and Schwarz dominate the professional segment.
- A properly calibrated instrument is verified annually by a COFRAC-accredited laboratory.
Instrument families
Sensors (temperature, pressure, flow, level) collect physical data. Portable instruments (multimeters, clamp meters, infrared thermometers) are used for field diagnostics. Stationary analysers (oscilloscopes, spectrum analysers) equip test benches.
Professional multimeter range comparison
| Tier | Accuracy | CAT category | Indicative price |
|---|---|---|---|
| Technician | 0.5 % | CAT III 600V | 200 to 400 euros |
| Industrial | 0.1 % | CAT IV 600V / CAT III 1000V | 500 to 1,200 euros |
| Metrology | 0.01 % | CAT III 1000V | 2,000 euros and above |
For further reading, see our industrial PPE guide and our CMMS software comparison that supports metrology plans.
FAQ
How do you choose industrial measurement instruments?
Choosing an industrial measurement instrument depends on the measured quantity, required accuracy, operating environment and budget. Prefer ISO 17025 certified brands for legal metrology.
What is the difference between a professional and a consumer multimeter?
A professional multimeter offers CAT III or CAT IV, basic accuracy below 0.5 %, True RMS and a CAT certification compliant with EN 61010. Consumer models are limited to CAT II with 1 to 2 % accuracy.
What is an accuracy class in metrology?
Accuracy class expresses the maximum uncertainty of an instrument as a percentage of full-scale value. A class 0.1 instrument is 10 times more accurate than class 1.