EMF 823 is a portable, handheld electromagnetic radiation detector or gauss meter for measuring electromagnetic fields (EMFs). This user-friendly EMF analyzer is ideal for assessing risks associated with exposure to electromagnetic radiation emitted from electric power lines, home appliances and industrial devices.
電磁波，又稱電磁輻射，是指同相振盪，電磁輻射的量子形式是光子。電磁波不需要依靠介質進行傳播，在真空中其傳播速度為光速。電磁波可按照頻率分類，從低頻率到高頻率，主要包括無線電波、微波、兆赫輻射、紅外線、可見光、紫外線、X射線和伽馬射線。人眼可接收到的電磁波，波長大約在380至780nm之間，稱為可見光。只要是本身溫度大於絕對零度的物體，除了暗物質以外，都可以發射電磁輻射，而世界上並不存在溫度等於或低於絕對零度的物體，因此，人們周邊所有的物體時刻都在進行電磁輻射。儘管如此，只有處於可見光頻域以內的電磁波，才可以被人們肉眼看到，對於不同的生物，各種電磁波頻段的感知能力也有所不同。
Electromagnetic Radiation Detector EMF 823
- EMF range / resolution: 20 micro Tesla x 0.01 micro Tesla, 200 micro Tesla x 0.1 micro Tesla, 2000 micro Tesla x 1 micro Tesla (µT) or 200 milli-Gauss (mG) x 0.1 mG, 2000 mG x 1 mG, 20000 mG x 10 mG
- EMF bandwidth: 30 Hz to 300 Hz
- Sampling time: Approx. 1 second
- Accuracy: ±4 % + 3 digits (up to 20 µT), ±5 % + 3 digits (up to 200 µT), ±10 % + 5 digits (up to 2000 µT)
- Display: 48.8 x 25.3 mm / 1.92 x 0.1 " LCD with backlight
- Over range indication: Display shows "- - - -"
- Operating temperature: 0 ... +50 °C / +32 ... 122 °F, Max. 80 % rh
- Power: 1 x 9 V DC battery (006P, 6F22)
- Dimensions: 152 x 69 x 36 mm / 5.98 x 2.72 x 1.42 "
- Weight: 215 g / 0.47 lb (including battery)