The application

The desire of individuals for mobility has also swept the telecommunications field throughout the world. Since the beginnings of mobile radiotelephony, with the clumsy mobile telephones of the analogue C Network, the cell-phone industry has boomed, expanding into one of the world's largest growth markets.

The spread of these technologies everywhere creates an increase in the exposure to electromagnetic radiation, especially near the transmitters. Both the base stations and the cellular phones themselves are sources of high-frequency radiation.

Throughout the world, numerous studies have been and are being conducted on the possible hazards and effects on people and the environment. These are usually performed under laboratory conditions, so the results are not directly applicable, or epidemiological field studies are conducted without knowing the exact exposure dose.

These can only be registered correctly by means of a continuous-reading mobile-radio dosimeter worn on the body.

This makes studies which take into account the actual field strength in the mobile-phone bands under real environmental and living conditions possible for the first time.

The meter

The ESM-140 is an innovative instrument for frequency-selective registration close to the body of all relevant private-mobile-radio bands, including DECT and WLAN (patents pending).

It measures the correct value of the electric field strength for selected frequencies over a large solid angle close to the body.

The ESM-140 does not generate any high-frequency radiation itself, and is therefore especially suitable for electrosensitive persons and for epidemiological studies at minimal field strengths.
 

Frequency-selective measurement of the mobile-radio bands High sensitivity of 10 mV/m Generates no high-frequency radiation itself Continuous measuring of all frequency bands Low weight of 70 g Measures GSM-900, GSM-1800, DECT, UMTS, WLAN Measures the mean or maximum field strength Large range, from 0.01 V/m to 5 V/m Marking function for events 6 days' operating time without interruption Dust-proof and splash-proof to IP67

The software

The Windows^tm-compatible software included allows up to eight measurement jobs with specified starting and finishing times to be programmed. At the specified time, down to the second, the ESM-140 starts the measurement automatically, and ends it as specified. Eight signal channels are always measured in parallel, and the readings stored in a memory with space for 130,000 records each.
 

Specifically for epidemiological studies, the program Graph ESM-140 possesses special statistical evaluating and reporting functions. Individual bands can be suppressed by means of the legend. The readings can be exported in common file formats.
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