Does it detect ultrasonic sound frequencies? Like the mosquito alarm?

No, only EMF / RF, electro magnetic spectrum not sound waves

Will this equipment detect electricity pylons for say up to 1 mile ? (i want to know before I purchase a new house)

It really depends on the strength of the electromagnetic field being generated. An electromagnetic field decreases exponentially over distance, as a result I would suggest that a pylon carrying 400KV a mile away would be undetectable over the earths natural magnet field. This device is capable of detecting emissions from TV's, computers and other electrical systems within the home. So in short the answer is no. If the pylon your concerned about is about a mile away I'm sure it would have no detrimental affect whatsoever.

Can this device function as a Geiger counter in the event of a nuclear incident please?

No, definitely not. It measures electromagnetic radiation up to 10GHz, not nuclear radiation. It is mainly useful for detecting dangerous levels of non-ionising radiation from mobile phones, smart devices in general and. Microwave cookers etc. They do a Geiger counter version that does detect nuclear radiation. It detects beta and gamma radiation that would be emitted by a nuclear explosion but not alpha particles resulting from breathing in radioactive dust. However, beta and gamma radiation detection is generally the best indication of a nuclear event.

What is the maximum time period of data that can be recorded on onboard flash memory and transfered to PC?

It is about 24Hrs for every seconds data.

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Sponsored Ad – EMF Meter, Advanced GQ EMF-390 Multi-Field Electromagnetic Radiation Detector 3-in-1 EMF ELF Meter & RF Spectrum Analyzer, Cell Tower Smartmeter Signal Detector RF up to 10G Data Logger

Sponsored Ad – EMF Meter, Advanced GQ EMF-390 Multi-Field Electromagnetic Radiation Detector 3-in-1 EMF ELF Meter & RF Spectrum Analyzer, Cell Tower Smartmeter Signal Detector RF up to 10G Data Logger

Product ID: 93934272

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Details

Brand
GQ
Colour
Gray
Power source
Corded
Item weight
10 Ounces
Maximum range
10 Metres

⚡EMF sensing up to 400 kHz

📊Real-time RF spectrum analyzer

📡RF detection up to 10 GHz

Description

📡 Stay connected, stay protected — master your electromagnetic environment!

COMPACT POWERHOUSE - Lightweight 283g design fits perfectly in your toolkit or desk setup for on-the-go peace of mind
FUTURE PROOF DETECTION - 3-in-1 multi-field meter covers ELF, RF, and EMF frequencies for comprehensive electromagnetic awareness
CUTTING EDGE RF MONITORING - Built-in spectrum analyzer and GQ RF Browser deliver real-time, precise RF data up to 10 GHz
PINPOINT INVISIBLE THREATS - Detects power lines, smart meters, cell towers & microwaves with ultra-sensitive multi-sensors
STAY AHEAD OF EMF EXPOSURE - Instant safety suggestions keep you informed and empowered in any environment

The GQ EMF-390 is a professional-grade 3-in-1 electromagnetic radiation detector featuring high-sensitivity sensors for power lines, smart meters, cell towers, and microwaves. It measures EMF up to 400 kHz and RF signals up to 10 GHz, equipped with a built-in RF spectrum analyzer and real-time monitoring via GQ RF Browser. Compact and lightweight, it offers instant safety feedback, making it an essential tool for managing electromagnetic exposure in modern environments.

Specifications

Manufacturer	GQ Electronics LLC
Part Number	EMF-390
Product Dimensions	13.97 x 7.62 x 2.54 cm; 283.5 g
Batteries	1 LR44 batteries required.
Item model number	EMF-390
Colour	Gray
Power Source	Corded Electric
Item Package Quantity	1
Temperature Range	5 Degrees Celsius
Plug profile	Wall Mount
Batteries included?	No
Batteries Required?	No
Battery Cell Type	Lithium Ion
Battery description	Lithium-Ion
Item Weight	283 g

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