What a personal RF monitor does that a survey meter does not
A survey RF meter answers "how strong is the field at this point, right now?". A personal RF monitor answers a different question: "am I about to walk into a field stronger than my exposure limit?" It is worn on the body, it monitors continuously, and it alarms — audibly, visibly and by vibration — the moment a threshold is crossed.
That makes it standard equipment for anyone working near transmitters: tower climbers, rooftop and small-cell technicians, broadcast and radar engineers, installers, inspectors and safety officers. It is also the right tool for anyone who needs a continuous record rather than a spot reading.
Personal monitor vs RF meter vs spectrum analyser
| Personal RF monitor | RF survey meter | Spectrum analyser | |
|---|---|---|---|
| Question it answers | Am I over my limit? | How much field is here? | Which source and band is it? |
| How it is used | Worn, hands-free, continuous | Held, pointed, spot readings | Bench or tripod, analysis |
| Output | % of exposure standard + alarm | µW/m², V/m or mW/m² | Amplitude vs frequency trace |
| Typical buyer | RF worker, safety programme | Homeowner, consultant | Engineer, coordinator |
| Shop | See below | RF meters | Spectrum analyzers |
How to choose one
- Frequency coverage must cover the transmitters you approach. Older monitors stop around 6 GHz. Modern 5G work, and any millimetre-wave site, needs coverage well beyond that — the FieldSENSE 60 covers 50 MHz to 60 GHz for exactly this reason.
- The alarm threshold must map to a standard. Good monitors display exposure as a percentage of an occupational limit (ICNIRP or FCC), because that is what a safety programme and an incident report are written against.
- Shaped (frequency-weighted) response. Exposure limits vary with frequency; a monitor that applies the standard's shaping reports usable percentages instead of a raw field value you must convert by hand.
- Isotropic sensing. The monitor is worn in an arbitrary orientation, so it must respond equally in all directions.
- Logging and reporting. If exposure has to be documented, choose a model that logs and exports rather than one that only alarms.
- Wearability. Chest or arm mount, glove-friendly controls, battery life across a full shift, and an ingress rating suited to outdoor work.
Models we stock
- FieldSENSE 60 — 50 MHz to 60 GHz personal RF monitor. The choice where 5G and millimetre-wave sites are in scope.
- FieldSENSE 2.0 — the established wearable monitor for tower and rooftop work below 6 GHz.
- Handheld RF meters — where you need a number at a point rather than a wearable alarm, for example when verifying shielding.
Using it correctly
- Wear it on the outside of clothing and outer PPE, on the side of the body facing the antenna.
- Function-check before every shift; a monitor that has not been checked is not a control.
- Set the alarm to the limit in your RF safety programme, not to the highest setting available.
- Treat an alarm as an instruction to increase distance immediately, then reassess — not as a reading to note down.
- Keep calibration current. An out-of-calibration monitor invalidates the exposure records built on it.
Related reading
EMF meter buying guide · Safe EMF levels for humans · RF spectrum analyzers and signal generators