Technology Alternatives 7021 Cell Sensor EMF Detection Meter
by Technology Alternatives Corp
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List Price: Our Price: $24.99 You Save: $25.00 (50%) Availability: Usually ships in 1-2 business days Category: Tools See more product details |
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Tools and Hardware Reviews of Technology Alternatives 7021 Cell Sensor EMF Detection Meter
Customer Review: love this item
Summary: 5 Stars
I am very pleased with this item. We use it a lot. I have no regrets buying this product!Customer Review: It really works
Summary: 5 Stars
The cell censor really does a good job of finding the EMF's. Easy to use.Customer Review: Best Used for Measuring ELFs
Summary: 4 Stars
Couple things I noticed about this device. First, it measures both RF (radio frequency) and ELF (extremely low frequency) together, with no way to test each individually. Second, it is NOT designed to measure cellphone tower radiation and will not detect them, only the close RF radiation of a cellphone. It couldn't really pick up on my 2.3 GHz cordless phone emissions either when it was sounding the dial tone, maybe that frequency was too high. But it wasn't designed for that either. It's sensitive to regular cellphones frequencies though. I also realized after buying, that since cellphones have to meet emission standards, there is not much point for me to measure its RF output other than to confirm it meets those standards... well, other than to see whether those things you stick onto cellphones to lower their RF actually works. Those are my only gripes.
Now, onto the good points. If you follow the instructions, this thing will indeed give you a decent approximation of the radiated power output of a cellphone. So it's true to advertised claims. Where this device shines is as an ELF meter for measuring the vibrating magnetic fields around clock radios, power lines, computers, appliances, and home wiring. I tested the frequency response and it measures best ELF fields between 30Hz and 900Hz, sensitivity rolling off greatly outside that range. On the "high" sensitivity setting, it even registers sudden movements of the probe, which I think is the CellSensor cutting the flux lines of earth's magnetic field. So if you shake/wiggle the probe in a given space, you can get a very rough idea of whether there's a DC magnetic field there. Like if you wiggle it just a little above a magnet the meter will go off the charts. So when you do your ELF readings, be sure to keep the probe still if you want to measure just the ELF fields of things nearby, otherwise you'll get a false reading generated by stationary magnetic fields.
So in summary, this was worth buying, but mainly only to measure nearfield cellphone emissions and ELFs from current-carrying devices. It won't work for detecting cell tower radiation, finding wifi hotspots, measuring wifi output, and it won't detect the strength of static magnetic fields unless you get creative and wiggle the probe. For those applications, I recommend a proper RF Signal Detector good for 50MHz to 6Ghz ( Professional Wireless RF Signal Bug Detector ), and for static magnetic fields look for a DC Gauss Meter.
I haven't tried to detect ghosts with it, but it probably also ought to detect EM disturbances caused by alien ships hovering over the house, haha.
Customer Review: Great little EMF meter for the price of $30.
Summary: 4 Stars
Great little EMF meter for the price of [...]. I decided to purchase this EMF meter after inquiring about a many more digital EMF meters and when I got this one I was pleasantly surprised it works well. It has sensitive setting of 1-5 mlGauss and then a normal setting of 10-50 mlGauss for typically higher level EMFs. The sensor is on a dongle connected to the meter and I've put a 3M velcro sticker to attach it to body pointing forward and able to remove it if needed.
I purchased this through Spectral Technologies on Amazon.com . It was incredibly fast shipping and the item arrived as described with tracking and no one can beat their price even with shipping costs. I put a 4 out 5 for them but they really deserve a 5 out of 5 so I removed my rating of them.
Customer Review: no need to buy high price EMF meters
Summary: 4 Stars
Works great! Push button on and go, it'll light up when EMF is detected letting you know without even looking at it, and the two modes (normal or high) are great if you need more precise or more broad of a reading, normal read 0 to 50 milligauss, and high reads 0 to 5. I haven't used the EML mode much so I won't rate that, but it does work. Plus the probe is seperate so you can move it around to get a tri-field effect for better readings. The only reason I didn't give it a full 5 rating is that I don't think the range is very good, I think three, maybe four feet is the maximum range, but that's good enough for me.