How to Measure EMF in Your Home — Australia Guide
Once you understand what EMF is and have decided you want to assess your home environment, the next question is practical: how do you actually do it? This guide covers which meters to use in Australia, what the readings mean, and a room-by-room protocol for a thorough home assessment.
A few things to establish upfront: EMF is not a single thing, and a single meter won’t measure all of it. There are three distinct field types you should know about, each requiring different measurement approaches.
What You’ll Learn
- The three types of EMF fields and why each requires different measurement
- Which meters are worth buying in Australia and at which price point
- How to interpret readings against reference values
- A room-by-room assessment protocol you can complete in an afternoon
- The highest-impact changes to make once you have your baseline data
The Three Types of EMF — and What Measures Them
1. RF (Radiofrequency) — 100 MHz to 6 GHz
RF radiation is emitted by Wi-Fi routers, mobile phones, smart meters, Bluetooth devices, and baby monitors. It’s measured in microwatts per square metre (µW/m²) or milliwatts per square metre (mW/m²). This is the field type most people are concerned about, and the one most commonly found at elevated levels in modern Australian homes.
2. ELF Magnetic Fields — 50 Hz
ELF magnetic fields are generated by anything carrying alternating current — power lines, household wiring, electrical appliances, transformers. In Australia, mains frequency is 50 Hz. Measured in milligauss (mG) or microtesla (µT). This is the field type most associated with the childhood leukaemia research discussed in our EMF explainer.
3. ELF Electric Fields — 50 Hz
Electric fields radiate from any wire carrying voltage, even when no current is flowing. Measured in volts per metre (V/m). Often overlooked, but can be significant near wiring in walls behind beds. Electric fields are easily shielded by earthed materials.
Which EMF Meter to Buy in Australia
Trifield TF2
The most commonly recommended entry-level meter for home users. Measures RF, ELF magnetic, and ELF electric fields in a single device. Not professional accuracy, but reliable enough to identify elevated sources and compare locations.
- Measures all three field types
- Straightforward display — no software required
- Available from Australian suppliers
- Limitation: RF range tops out at ~1 GHz; some 5 GHz Wi-Fi will be underread
Safe and Sound Pro II
RF-only meter with excellent frequency range coverage (200 MHz to 8 GHz). Better suited to measuring modern 5 GHz Wi-Fi and 5G frequencies than most entry-level meters. Clear LED bar display and audio mode. Use alongside a separate ELF meter for a full picture.
- Superior RF frequency range
- Intuitive for non-technical users
- Pairs well with a separate ELF meter
- RF only — does not measure magnetic or electric fields
Gigahertz Solutions HF38B + NFA1000
German-made professional-grade instruments used by building biologists. The HF38B covers RF; the NFA1000 covers all ELF fields. Considerably more accurate and frequency-complete than consumer devices. Overkill for most homeowners but the standard used by Australian building biologists.
- Professional accuracy and frequency coverage
- Used by certified building biologists in Australia
- Significant investment — consider hiring a building biologist instead
Recommendation for most Australians: Start with the Trifield TF2 if budget is a consideration. If you are particularly concerned about 5 GHz Wi-Fi or 5G, add or substitute the Safe and Sound Pro II. If you want professional accuracy without buying professional equipment, hire an ICSBE-certified building biologist for a home assessment (~$300–$600 for a residential inspection).
How to Interpret Your Readings
The ARPANSA/ICNIRP exposure limits are far above the levels typically found in residential environments — they are not a useful benchmark for understanding whether your home environment is optimised. The more relevant reference points are the precautionary guidelines developed by building biology and environmental medicine organisations.
| Field Type | Unit | Low Concern | Moderate Concern | High Concern | Reference |
|---|---|---|---|---|---|
| RF (radiofrequency) | µW/m² | <10 | 10–1,000 | >1,000 | Building Biology Standard SBM-2015 |
| ELF Magnetic Field | mG (milligauss) | <0.2 | 0.2–1.0 | >1.0 | Building Biology Standard SBM-2015 |
| ELF Electric Field (sleeping area) | V/m | <1 | 1–5 | >5 | Building Biology Standard SBM-2015 |
Note: These building biology precautionary guidelines are significantly more stringent than Australian regulatory limits. ARPANSA limits are set to prevent established biological effects; building biology guidelines are precautionary — they represent levels considered optimal for sleep and health by practitioners who apply the precautionary principle.
Room-by-Room Assessment Protocol
Work through your home systematically. For each room, take readings at multiple points. Write down what you find — you want a baseline, not just a spot-check. Turn devices on and off to isolate sources.
Bedroom — Highest Priority
This is where you spend 7–9 hours a night. Your sleeping environment is the most important area to optimise.
- Measure RF at your pillow position with all devices on, then with phone switched to aeroplane mode
- Measure ELF magnetic at pillow height — check for elevated readings from wiring in adjacent walls or electric blankets
- Check beside and behind bedhead for wiring runs
- Measure any baby monitor, clock radio, or bedside charging device
- Note the direction of the nearest external power line
Home Office / Desk
- Measure RF at desk level with Wi-Fi on — note distance from router
- Measure ELF magnetic at desktop and chair position from any UPS, power boards, or desktop computers
- If using a laptop on mains power, measure ELF magnetic at the keyboard — many laptop chargers are significant ELF sources
- Test the difference between Wi-Fi and ethernet connection (ethernet eliminates router RF from your immediate field)
Living Areas
- Identify Wi-Fi router location and measure RF at typical seating positions at various distances
- Measure near TV, gaming consoles, and smart speakers
- Check near the smart meter (usually on an exterior wall) — measure inside at the closest internal point
- Measure ELF magnetic near any large appliances on shared walls (fridge compressors, washing machines)
Kitchen
- Measure ELF magnetic near microwave when operating — stay at arm’s length, note the rapid drop-off with distance
- Check ELF magnetic at countertop height from appliances below the bench
- Measure RF near any smart appliances
The Highest-Impact Reductions — In Order
Move your phone out of the bedroom. A mobile phone actively seeking signal beside your bed while you sleep is one of the highest-RF exposures in most homes. Charge it in the hallway or use aeroplane mode. This single change produces a large reduction in your sleeping-environment RF exposure.
Relocate or timer your Wi-Fi router. Move the router to the room in your home furthest from bedrooms and your main daytime workspace. Install a cheap plug-in timer ($10–$20) to switch it off overnight. 8 hours of zero router RF emission nightly adds up significantly over time.
Use ethernet for stationary devices. Desktop computers, smart TVs, gaming consoles, and streaming devices that don’t move can all be hardwired with ethernet cables. This eliminates their Wi-Fi radio emission and also typically improves connection speed. A small ethernet switch costs $20–$40.
Address elevated ELF magnetic fields in the sleeping area. If you find elevated ELF magnetic readings (above 1 mG) at your bed position, investigate the source. Common causes: a switch board on the other side of the wall, an electric blanket left plugged in, or a power board under the bed. Relocate the bed if needed — even 1–2 metres can make a significant difference given the rapid decay of magnetic fields with distance.
Switch from wireless to wired baby monitors. Baby monitor transmitters often sit very close to a sleeping infant — sometimes within 30cm. The RF exposure at this distance is significant for a small body. Analogue or wired alternatives exist.
Quick Start Plan
- Start tonight: phone on aeroplane mode or charged outside the bedroom
- This week: put your router on a timer or unplug it before sleep
- Order a Trifield TF2 and do a bedroom baseline — 30 minutes of measurement
- Use the room protocol above to identify your home’s highest sources
- Read: What Is EMF Radiation and Should Australians Be Concerned?
Former Royal Australian Navy Clearance Diver and TAG-E counter-terrorism operator. Founded Clean and Native to apply the same rigorous thinking to the home environment.
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