FAQ and Buyer's Guide
FAQ (Frequently Asked Questions): most frequently asked questions
Which electromagnetic wave measuring device to choose?
How to choose the right electromagnetic wave measuring device?
What is the difference between a wave detector and a wave measuring device?
What are the differences between the ESI22, ESI23 and ESI24 wave detectors? Which one to choose ?
How to choose the right protection against electromagnetic waves?
Diagnostic CEM Online Store - Buying Guide and FAQ:
Why buy my electromagnetic wave detector or my wave measuring device from Diagnostic CEM?
- Free delivery in the EU from 200€ of purchases
- Secure payment
- Best price
- Quality and reliability of devices
Why buy my protections against electromagnetic waves from Diagnostic CEM?
All the products for protection against electromagnetic waves offered by the Diagnostic CEM online store have been tested by independent laboratories to validate their effectiveness. The electromagnetic wave protections from the Diagnostic CEM shop are effective products for protecting against waves. Diagnostic CEM is a specialist in EMF protection and electrosmog shielding.
To which destinations does Diagnostic CEM ship the products in its online store? From which countries can customers order on the Diagnostic CEM online store?
We ship our products to the following countries:
- United Kingdom (England, Scotland, Wales, Northern Ireland) and Ireland
- United States, Canada, Australia, New Zealand, Oceania
- France (Metropolitan France including Corsica), Andorra and Monaco
- Belgium and Luxembourg
- Switzerland and Liechtenstein
- Germany and Austria
- Italy (including Vatican and San Marino)
- Netherlands
- Spain (including Balearic Islands, Canary Islands, Ceuta and Melilla)
- Portugal (including Azores and Madeira)
- Eastern Europe, Scandinavia, Greece, Cyprus
- Israel, Turkey, Middle East, India, Pakistan
- Algeria, Morocco, Tunisia, Africa
- Mexico and Central America
- Jamaica, Dominican Republic, Puerto Rico, Bahamas and Caribbean Islands
- Brazil, Argentina, South America
For customers located in the United Kingdom or in states or territories in our delivery area that are not members of the European Union Customs Union, there may be customs duties payable upon receipt of the package in addition to the product prices displayed in the Diagnostic CEM online store: www.diagnostic-cem.shop. Contact your local authorities for more details.
For customers located outside our shipping area, please contact us so that we can accurately calculate the delivery costs for the product or products you wish to order from the Diagnostic CEM online store.
What are low and high frequency electromagnetic waves?
There are two main types of electromagnetic waves:
- low frequency waves
- high frequency waves
Low-frequency electromagnetic waves are produced by electrical devices, high voltage (HV) and very high voltage (VHV) power lines, electrical transformer stations (electrical transformers), railways, subways and catenaries. electric meters, communicating or not, and electricity in general.
High frequency electromagnetic waves are generated by:
- television broadcasting and radio broadcasting (FM)
- GSM, UMTS (3G), LTE (4G), 5G mobile telephony
- DECT wireless home telephony
- Wi-Fi and Bluetooth
- microwave ovens
- CB and amateur or professional radio communications (PMR, TETRA, ...)
- Radar systems
What units of measurement are used to quantify electromagnetic waves?
For low frequency electromagnetic waves, we measure:
- the electric field (in V/m)
- the magnetic field (in nT - nanoTesla - or in mG - milliGauss)
Regarding high frequency electromagnetic waves, we measure:
- the electric field (in V/m or in µW / m2)
For example: 1999 µW/m2 = 0.868 V/m and 19 990 µW/m2 = 2.745 V/m
Choosing a wave detector or an electromagnetic wave measuring device?
There are two main families of devices for detecting or measuring electromagnetic waves:
- wave detectors
- wave measuring devices
Electromagnetic wave detectors make it possible to quantify a level of exposure to electromagnetic pollution. Wave measuring devices give a numerical value in a given unit for the measured electromagnetic field.
What is an electromagnetic wave detector?
An electromagnetic wave detector is an instrument for assessing the level of intensity of electromagnetic waves. Via colored LEDs (green, yellow or red), it indicates the level of exposure to waves, for example:
- green: low level, no risk
- yellow: medium level, present risk
- red: high level, high exposure to waves, danger
Electromagnetic wave detectors are small, portable devices that fit easily into a pocket, so you can take them anywhere with you. They quickly make it possible to assess electromagnetic pollution in its environment. To know which range of numerical values a colored LED corresponds to, it is necessary to refer to the user manual of the detector, for example a yellow LED on can correspond to a level of 0.27 to 0.34 V/m in field electric high frequencies.
What is an electromagnetic wave measuring device?
A wave measuring device is an instrument with an LCD screen displaying precisely the measured value in digits of the intensity of the electromagnetic field measured in a given unit which depends on the type of electromagnetic wave (low frequency electric field, field low frequency magnetic or high frequency electric field).
What are the differences between the ESI22, ESI23 and ESI24 wave detectors? Which one to choose ?
| Detector / wave type | Low frequencies | High frequencies |
|---|---|---|
| ESI 22 | Yes | No |
| ESI 23 | Yes | Yes (50 MHz to 6 GHz) |
| ESI 24 | Yes | Yes (50 MHz to 10 GHz) |
These three detectors assess both the electric field and the magnetic field at low frequencies on separate LED lines.
All three have the function of checking the direction of connection of your electrical appliances (bedside lamps, etc.). An ungrounded electrical device often generates an electric field even when it is turned off, if the plug is plugged in the wrong way around. These detectors make it possible to check the direction of connection and thus reduce its exposure to low-frequency electromagnetic waves.
The ESI 23 and ESI 24 detectors are qualified as versatile because they detect both low frequency and high frequency electromagnetic waves (5G, Wifi,...).
The ESI 22 detector is particularly recommended in the event of an electromagnetic anomaly related to electricity (HV power line, electrified railway, electrical transformer, etc.) or in non-urban areas where high-frequency waves (WiFi, mobile telephony) , ...) are much less present than in urban areas, the main source of electromagnetic pollution being electricity in general and domestic electricity in particular.
The ESI24 wave detector has additional features compared to the ESI23 (for more information, see the product sheets).
ESI22 detector - direct link to the product sheet
ESI23 detector - direct link to the product sheet
ESI24 detector - direct link to the product sheet
New devices complete this range of detectors :
- the Cemprotec 31 electromagnetic wave detector device (high frequency electromagnetic waves, electric field)
- the Cemprotec 33 electromagnetic wave detector device (low and high frequency electromagnetic waves)
- the Cemprotec 34 electromagnetic wave detector device (low and high frequency electromagnetic waves)
These three devices have additional functions and extended measurement ranges compared to the range of ESI detectors.
Cemprotec31 wave detector - direct link to the product sheet
Cemprotec33 wave detector - direct link to the product sheet
Cemprotec34 wave detector - direct link to the product sheet
| Devices / Features | Measured frequency range | Frequency filter | Food | Price |
|---|---|---|---|---|
| ME3030B | 16 Hz - 2 kHz | No | 9V alkaline battery | € |
| ME3830B | 16 Hz - 100 kHz | No | 9V alkaline battery | €€ |
| ME3840B | 5 Hz - 100 kHz | Yes | 9V alkaline battery | €€ |
| ME3851A | 5 Hz - 100 kHz | Yes | NiMH battery | €€€ |
| ME3951A | 5 Hz - 400 kHz | Yes | NiMH battery | €€€ |
The adjustable frequency filter integrated on the ME3840B, ME3851A and ME3951A devices makes it possible to measure an electric field or magnetic field strength at a given frequency.
ME3030B, ME3830B and ME3840B measuring devices are particularly dedicated to individuals and semi-professionals.
ME3851A and ME3951A measuring devices are primarily intended for professionals in electromagnetic wave measurement due to their advanced functionality, wide measurable frequency range and high sensitivity.
The detailed functionalities of each of these low frequency electromagnetic wave measuring devices are given on their respective product sheets.
All these low-frequency electromagnetic wave measuring devices measure the electric field and the low-frequency magnetic field, we switch from one to the other through a switch located on the right of the device.
ME3030B measuring device - direct link to the product sheet
ME3830B measuring device - direct link to the product sheet
ME3840B measuring device - direct link to the product sheet
Which high-frequency electromagnetic wave measuring device from Gigahertz Solutions or TES to choose?
TES brand measuring devices : TES-92 and TES-593
Gigahertz Solutions brand measuring devices : HF32D, HF35C, HFW35C, HF38B, HFE35C and HF59B
| Device / Function | Measured frequency range | Acoustic analysis | Unit of measure | Price |
|---|---|---|---|---|
| TES-92 | 50 MHz - 3,5 GHz | No | V/m et µW/m2 | € |
| TES-593 | 10 MHz - 8 GHz | No | V/m et µW/m2 | €€€ |
| HF32D | 800 MHz - 2,7 GHz | No | µW/m2 | €€ |
| HF35C | 800 MHz - 2,7 GHz | Yes | µW/m2 | €€€ |
| HFW35C | 2,4 GHz - 6 GHz | Yes | µW/m2 | €€€ |
| HF38B | 700 MHz - 3,3 GHz | Yes | µW/m2 | €€€ |
| HFE35C | 27 MHz - 2,7 GHz | Yes | µW/m2 | €€€€ |
| HF59B | 700 MHz - 3,3 GHz | Yes | µW/m2 | €€€€ |
Acoustic analysis: acoustic analysis function (detailed listening of the characteristic modulations of the different high frequency sources) with adjustable volume.
All these measuring devices are powered by a 9V alkaline battery except the HF59B which has a NiMH battery with charger supplied.
With its advanced features and high sensitivity, the HF59B device is dedicated to professionals in electromagnetic wave measurement.
The HFE35C and HF59B measuring devices can be optionally equipped with a frequency filter (FF10 from Gigahertz Solutions). This FF10 filter makes it possible to measure a high-frequency electric field intensity according to a given frequency (for example, just measuring WiFi radiation or just the intensity of 4G at a precise frequency).
The detailed functionalities of each of these high frequency electromagnetic wave measuring devices are given on their respective product sheets.
The Tenmars brand also offers devices for measuring high frequency electromagnetic waves:
- the TM-195 (equivalent to the TES-92)
- the TM-196 (equivalent to TES-593)
The functionalities are generally the same, the measured frequency ranges are identical, only the design changes.
Gigahertz Solutions high frequency wave measuring instruments are very sensitive and allow very low electromagnetic radiation anomalies to be detected. They have measurement limits of 0.868 V / m or 2.746 V / m. To measure higher intensities of high frequency electromagnetic waves, complete the purchase of these wave measuring devices with a DG20 or DG20_G10 attenuator. These attenuators make it possible to measure wave intensities up to 8.683 V / m or 27.459 V / m.
The DG20 attenuator works with the following Gigahertz Solutions wave measuring instruments: HF32D, HF35C and HF38B. Direct link to the product sheet
The DG20_G10 attenuator works with the following Gigahertz Solutions wave measuring instruments: HFE35C, HFW35C, HF59B, HFE59B and HFW59B. Direct link to the product sheet
TES92 measuring device - direct link to the product sheet
TM195 measuring device - direct link to the product sheet
TES593 measuring device - direct link to the product sheet
TM196 measuring device - direct link to the product sheet
HF32D measuring device - direct link to the product sheet
HF35C measuring device - direct link to the product sheet
HFW35C measuring device - direct link to the product sheet
HF38B measuring device - direct link to the product sheet
How to choose the right protection against electromagnetic waves?
What effective protection against electromagnetic waves to choose? Anti-wave paints, anti-wave fabrics, anti-wave meshes and fleeces, anti-wave films for windows, demand switches,...? What electromagnetic field do they protect against?
Low frequency electromagnetic waves come from electric current (high voltage power lines, electrical transformers, electrical appliances, electrical panels and electrical meters, domestic electricity, etc.).
High-frequency electromagnetic waves are linked to WiFi, Bluetooth, mobile telephony (3G, 4G, 5G relay antennas), radio and television broadcasting, DECT-type domestic cordless telephones, radars, etc.
The first step in choosing the right electromagnetic wave protection is to carry out an electromagnetic diagnosis in order to determine the source of the electromagnetic pollution present.
Electromagnetic wave detectors are particularly suitable for individuals wishing to assess themselves the electromagnetic pollution present in their environment.
For low frequency electromagnetic waves, the ESI 22 wave detector:
ESI22 wave detector - direct link to the product sheet
For high frequency electromagnetic waves, the Cemprotec 31 wave detector:
Cemprotec31 wave detector - direct link to the product sheet
For low and high frequency electromagnetic waves, the versatile Cemprotec 34 wave detector:
Cemprotec34 wave detector - direct link to the product sheet
To remove dirty electricity (dirty power) from your home electrical network:
The Panda PLC filter that plugs directly into an electrical outlet.
Polier Panda PLC filter - direct link to the product sheet
To protect against low frequency electromagnetic waves (electric field and magnetic field) from the domestic electrical network:
NA7 Comfort Gigahertz Solutions demand switch
To protect against the low frequency electric field:
YShield brand NSF34 shielding paint
To greatly attenuate the low-frequency electric field emitted by ungrounded electrical devices:
The USB grounding cable - direct link to the product sheet
To protect yourself from high frequency electromagnetic waves (5G, WiFi, etc.):
Shielding fabrics from the Swiss Shield brand to make your anti-radiation clothing, your anti-radiation curtains and curtains or shielding bed canopy.
YShield anti-wave films to prevent high frequency electromagnetic waves from entering through the windows, patio doors and bay windows of your home.
Shielding canopies in Swiss Shield fabrics, already made and easy to install, so that high-frequency electromagnetic waves do not disturb your sleep.
To block high frequency electromagnetic waves (5G, Wifi,...) and also the low frequency electric field:
YShield shielding paints (MAX54, PRO54, HSF54 and HSF64)
YShield shielding meshes and fleeces for floors, walls and ceilings.
Shielding canopies for beds in YShield fabrics
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