5G Esmog Spion – HF+LF Electrosmog Meter up to 8 GHz

The 5G Esmog Spion is a measuring instrument that helps you assess electric and electromagnetic fields at home and at work. This includes, for example, signals from Wi-Fi routers, DECT cordless phones, mobile phone and 5G transmitters, Bluetooth devices as well as fields from power cables, power supplies, dimmers or electrical appliances.

Typical locations are bedrooms, children’s rooms, living areas, offices, medical practices or workshops. With the device, you can find “hot spots”, i.e. areas with particularly high exposure, and check whether measures such as moving a router, switching off a wireless device or installing shielding material actually improve the situation. The 5G Esmog Spion is therefore a tool to understand your environment technically and to make more informed decisions about reducing electrosmog. It does not replace medical assessments or diagnoses.

Yes. The 5G Esmog Spion measures high-frequency (HF) signals in the range of approximately 250 kHz to 8 GHz. This range covers most current mobile services, including today’s common 5G frequencies, as well as GSM, UMTS, LTE, Wi-Fi and DECT. It is important to use the appropriate antenna for the frequency range in question (for example the mobile antenna for mobile services, the flat antenna for Wi-Fi / higher 5G bands).

The device not only shows you an approximate field strength on the LED bargraph, it also makes the signals audible. Different wireless services use different pulse patterns and therefore sound different. In this way you can not only see that radiofrequency fields are present, but also get a good impression of which type of wireless source dominates in a given area.

The standard device 90200 is the right choice if you want to locate and compare typical HF and LF sources such as mobile communications, 5G, Wi-Fi, DECT, Bluetooth, power supplies and electrical wiring. Three antennas covering the key frequency ranges are included. The Master Kit 90210 is designed for professional and recurring measurements. It additionally includes a light sensor, directional antenna, rechargeable lithium battery and carrying case. In short: choose the standard device for a quick start with a complete basic setup; choose the Master Kit for advanced source location, light modulation measurements and convenient transport. If you are unsure, we will be happy to prepare a written quotation or provide technical advice.

The 5G Esmog Spion uses several antennas to cover the relevant frequency ranges:

– Telescopic antenna on the HF input: useful for lower radio frequencies, for example broadcast radio, DAB+ or certain radio services.
– Mobile antenna: optimised for mobile bands from about 600 MHz to around 2.1 GHz. This covers GSM, UMTS, LTE, part of the 5G spectrum and DECT cordless phones very well.
– Flat HF antenna: designed for higher frequencies in the GHz range. This is used to measure Wi-Fi (2.4 and 5 GHz), Bluetooth and further higher 5G bands.
– Telescopic antenna on the LF input: for low-frequency electric fields from 50 Hz to 250 kHz, for example near wiring, extension cords, power supplies or dimmers.

For a complete assessment it often makes sense to measure consecutively with more than one antenna, because several types of sources are usually present in a room. This shows whether mobile services, Wi-Fi or low-frequency fields from the electrical installation contribute most to the exposure.

The 5G Esmog Spion converts radiofrequency fields into audible sound. It turns the high-frequency signal into a low-frequency audio signal. Each wireless system uses its own timing and pulse pattern, which creates characteristic sound signatures:

– A DECT phone often sounds like a steady, fast “rattle”.
– Wi-Fi typically sounds like an irregular crackling or popping noise that increases when data traffic is higher.
– Mobile services may differ depending on the standard (GSM, UMTS, LTE, 5G), often with characteristic “beats” or rhythms.

If you practise near known sources (router, DECT base station, mobile phone close to the antenna), you will learn to recognise these patterns more easily. In unknown situations, the combination of sound pattern and field-strength indication helps you narrow down the main sources, even when several wireless systems are active at the same time.

The 5G Esmog Spion is designed for both professionals (for example building biologists, electricians) and interested private users. Operation is intentionally kept simple: you select via switch whether you want to measure HF or LF, plug in the appropriate antenna, set the volume and then observe the LED display and the sound.

Beginners need some time to familiarise themselves, especially to connect sound patterns with specific sources and to interpret the readings correctly. If you proceed step by step (first measuring known sources and comparing them, later dealing with more complex situations), you will quickly obtain useful results. For very detailed expert reports or legally binding measurements, however, additional knowledge and often other types of instruments are required. For assessing your own environment, the 5G Esmog Spion is very well suited.

A simple basic procedure looks like this:

1. Get an overview: First switch on all wireless sources that are actually used in everyday life (router, DECT base, mobile phones, smart-home devices).

2. Start with HF: Select HF mode and an appropriate antenna (for example flat antenna for Wi-Fi, mobile antenna for mobile services). Walk slowly through the room, hold the device in front of your body and rotate in different directions. Observe where the LEDs increase significantly and how the sound changes.

3. Mark conspicuous locations, for example near the bed, the desk or external walls.

4. Switch to LF mode: Connect the telescopic antenna to the LF input and move along walls, cable ducts, power strips, transformers and appliances. Again, watch for higher readings and characteristic humming or saw-tooth-like sounds.

5. If necessary, repeat measurements at different times (during the day, in the evening, at night) to capture typical exposure situations.

This gives you a clear picture of where the highest HF and LF exposures occur in the room and allows you to decide which measures make sense (for example changing the position of the router, switching off devices at night, using shielding materials).

The readings of the 5G Esmog Spion are intended as practical orientation values. The device measures broadband and shows you the sum of all signals in the selected range. The display is logarithmic and works in steps. This means you can compare very well (“before/after”, “location A vs. location B”) and see whether exposure increases or decreases significantly.

For a rough comparison with published limit or guideline values, the displayed µW/m² and V/m figures can be helpful. However, you should not interpret these values as high-precision laboratory results but as approximate indications. For legally binding EMC measurements and exact comparisons with official limits, calibrated reference instruments are required. For everyday use – to see where exposure in your home is “high” or “low” and how mitigation measures influence it – the accuracy of the 5G Esmog Spion is generally more than sufficient.

The standard delivery of the 5G Esmog Spion typically includes the instrument itself, a telescopic antenna, a mobile antenna, a flat HF antenna, a battery power option and a German-language manual. With this equipment you can already investigate many common situations at home and at work.

For more advanced use, the manufacturer offers several accessories, for example:
– a light sensor that allows you to measure flicker and brightness variations of lamps and displays,
– a directional log-periodic antenna that helps you locate individual HF sources more precisely,
– a rechargeable 9-V lithium battery for longer measurement campaigns,
– a suitable carrying case for safe transport and storage.

If your main goal is to check your flat or house, the standard set is often sufficient. For professional reports, trainings or detailed investigations of light flicker and individual radio sources, the additional accessories are very helpful.

The 5G Esmog Spion is powered with 9–12 V DC, for example by a 9-V battery or a suitable 9-V lithium rechargeable battery. Many users prefer batteries or rechargeable batteries because external power supplies can create interference fields that influence the measurement. You can use a special, well-filtered mains adapter if you are sure it does not distort the readings – but for reliable measurements, battery operation is usually the safer option.

There are several ways to document your measurements:
– You can record the audio signal via the LF output (3.5-mm jack) to a recorder or a computer and thus store typical sound patterns.
– You can take photos of the LED bargraph and note date, time, location, antenna and operating mode.
– For reports or comparisons it is useful to number measuring points in the room and repeat the same measurements before and after mitigation measures (for example shielding, changing the position of devices).

In this way you create step by step a traceable documentation that allows you to see how the field situation has changed over time.

The 5G Esmog Spion operates in two domains:

– In the LF (low-frequency) range, the device measures electric alternating fields from 50 Hz to 250 kHz, typically originating from wiring, power lines, power supplies, dimmers or displays. The important unit here is V/m (volts per metre), which describes the strength of the electric field at a distance of one metre.

– In the HF (high-frequency) range, the device measures electromagnetic waves from about 250 kHz up to 8 GHz. This includes mobile phone signals, 5G, Wi-Fi, DECT and other wireless systems. In this range, the device uses µW/m² (microwatts per square metre). This indicates how much transmitted power is arriving per unit area at a given location.

The scales and the LED bargraph are logarithmic. This means that one step on the scale does not represent a very small change but a larger one. When more LEDs light up, exposure is not just slightly higher but noticeably higher. This gives you a good indication of whether a location is weakly, moderately or strongly exposed.