Extech 480823電磁フィールドと非常に低い周波数メーター

Not in accord with some of the other oppinions. When compared with other more expensive devices the indications proved to be quite similar. In conclusion it seems a reasonable trustable device for its price.

Extech 480846: instrument too expensive if bought at full price (about 600 euros, but even more if purchased from electronic distributors), purchased from AmazonWarehouse at a reasonable price (about 190 euros), arrived with original box and in perfect condition. Tested by comparison with instruments of greater precision and cost, both in anechoic chamber and in front of a horn antenna from 500MHz to 8GHz, both as absolute levels and as linearity (I didn't go further). Unfortunately in RF measurements it barely reaches 7GHz, besides it quickly loses sensitivity, but it is still useful for WiFi or microwave ovens. But the worst thing is that the instrument, despite being triaxial, is not isotropic in its measurements, so it is heavily influenced by the orientation, so you forget the absolute measurements :-) At most you can do it before using it in the field. vague idea of ​​how it behaves by measuring known fields and rotating it ... Large display but not backlit (which is very fasdisiosa in the workplace) and simple interface, but that can be improved, for example, it does not keep the time (in my opinion they have not mounted the battery internal that perhaps in some other version existed, no possibility of firmware updates), it would cost little to do so and would increase the class of use. I know the Extech brand and it is a serious company, but I warn you, as usual instrument for non-professional use, but accepting the limits perhaps it is usable (obviously the specifications declared by the manufacturer only absolutely fallacious and illusory). Instrument without internal shielding on electronic circuits, therefore unsuitable for fields over a few V / m. The fact of being able to set a calibration constant is appreciable. Extech 480846: strumento troppo costoso se comprato a prezzo pieno (circa 600euro, ma anche di più se acquistato presso distributori elettronici), acquistato da AmazonWarehouse ad un prezzo ragionevole (circa 190euro), arrivato con scatola originale ed in perfette condizioni. Provato per confronto con strumenti di maggiore precisione e costo, sia in camera anecoica che davanti ad una antenna a tromba da 500MHz a 8GHz, sia come livelli assoluti che come linearità (oltre non sono andato). Purtroppo nelle misure in RF arriva a malapena a 7GHz, oltre perde rapidamente di sensibilità, ma è comunque utile per WiFi o Forni a microonde. Ma la cosa peggiore è che lo strumento, pur essendo triassiale, non è isotropo nelle misure, per cui risente dell'orientazione pesantemente, per cui le misure assolute ve le scordate :-) Al massimo ci si può fare prima di usarlo sul campo una vaga idea di come si comporta misurando campi noti e ruotandolo... Display grande ma non retroiluminato (cosa molto fasdisiosa in ambito lavoro) ed interfaccia semplice, ma migliorabile, ad esempio, non mantiene l'ora (secondo me non hanno montato la pila interna che forse in qualche altra versione esisteva, nessuna possibilità di aggiornamenti firmware), costerebbe poco farlo e ne aumenterebbe la classe d'impiego. Conosco il marchio Extech ed è una casa seria, ma vi avviso, come al solito strumento ad uso non professionale, ma accettando i limiti forse è utilizzabile (ovviamente le specifiche dichiarate dal costruttore solo assolutamente fallaci ed illusorie). Strumento privo di schermature interne sui circuiti elettronici, per cui inadatto a campi oltre pochi V/m. Apprezzabile, il fatto di poter impostare una costante di calibrazione.

Rien à signaler... c'est conforme, c'est pratique et c'est facile à prendre en main . Je recommande pour une utilisation dans le quotidien.

With just a little practice I was able to identify the sources in my home of electromagnetic HF radiation that are above the acceptable threshold of 10 microW/m2. The most powerful source? It turned out that I was carrying it around all day (iPhone 4). Got rid of that and that has really improved my well being. So for me: worth the investment. A non smartphone ordinary GSM mobile phone is OK when not in active use and also OK (less than 10 microW/m2) in use provided I use the earphone and keep the phone at arm's length.

I bought this EMF meter under Express Shipping it took 2 days longer to arrive than expected. But that was Offset with the Wonderful product this is for me and my household. We as a family discovered amny important things which we did not know about the appliances around the house such as, Refrigerator has the maximum radiation of EMF and it comes to our toilet while bathing!! Amazing Also that there were no paranormal activity in the house. Took this to the graveyard and detected 40+ mGauss readings disappearing suddenly. This is great for know how radiated your area is around the place you live or work. Long term radiation can lead to dreadful diseases this product leads you to that awekening. I even measured my Gems and Crystals which have 30hz+ radiation as well. I am completely satisfied with the results