Low Frequency
Low-frequency meters: reliably measure electric & magnetic fields
Low-frequency electromagnetic fields (LF) occur wherever current flows—typically at home and in the workplace (e.g., 230 V wiring, cables inside walls, power strips, transformers, power supplies, dimmers, larger appliances). Depending on the situation, both electric fields (voltage) and magnetic fields (current flow) matter—and they behave differently. That’s why it’s important to use dedicated low-frequency meters that capture these fields correctly and make the results usable for assessment.
An additional aspect: modern electronics can “pollute” the mains supply with harmonics in the kHz range (often referred to as “dirty power”). For a realistic assessment, it can therefore be useful to use measurement technology that considers not only the fundamental range but also these components.
Tip: Use our interactive decision aid to quickly find the right low-frequency meter for your application—whether you’re a beginner or performing professional measurements.
- Detect & assess electric fields
- Track down magnetic fields—even locally near cables, devices & transformers
- Practical guidance for understandable, reproducible measurements
- Optional: long-term logging to analyze typical exposure profiles (day/night)
- Available immediately
-
Delivery time: 5 - 7 Workdays (DE - int. shipments may differ)
- Available immediately
-
Delivery time: 1 - 3 Workdays (DE - int. shipments may differ)
Why measure low frequency? Measurement provides clarity.
Electrosmog is discussed controversially—making a careful assessment of your own environment all the more important. With qualified low-frequency measurement technology, you gain a solid basis for decisions: you can identify whether and where electric or magnetic interference fields occur and derive measures in a targeted way—instead of guessing.
Electric fields vs. magnetic fields: two causes, two measurement tasks
Electric fields are primarily related to voltage, cable routing and the installation situation. Magnetic fields are created by current flow and are often more dependent on load, wiring geometry (e.g., loops) and distance. For a sound assessment, low-frequency meters should therefore be able to measure electric and/or magnetic fields separately depending on the question—this is a key difference compared with simple “all-in-one” gadgets.
Long-term measurement & data analysis for professionals
For a robust analysis, a single snapshot is not always enough. Especially in bedrooms or workplaces, long-term recordings are helpful to reveal typical profiles (e.g., at night, during load changes, or due to time-controlled devices). In professional low-frequency measurement practice, the NFA1000 plays a special role: it measures three-dimensionally and can be used as a data logger. Evaluation is conveniently performed with the included NFAsoft software, allowing measurement series to be analyzed and documented clearly.
In addition, depending on the setup, the NFA1000 can also be used as a logger for HF measurements in combination with suitable professional HF devices (separate channel/connection). This is particularly useful if you want to review low and high frequency together over a period of time.
Effective protection is possible—often without sacrificing comfort
If you find elevated values, you don’t automatically have to give up technology. In many cases, avoidable exposure can be reduced through simple, practical steps (e.g., checking device/cable positions, increasing distance, identifying specific circuits). For more advanced solutions, our shop also offers technical aids such as mains disconnect switches and suitable shielding materials—depending on which type of field is relevant in your situation.
Kits & decision aid: combine low frequency with high frequency sensibly
In practice, high and low frequency often occur independently and require dedicated measurement technology. If you want a more complete picture, kits/measurement cases are a sensible solution—matched to budget and application level. You’ll find a quick overview in our measurement cases & kits category as well as in the decision aid.