Electromagnetic Field Radiation Monitors

The ELF Series Field Monitors are low cost, portable, handheld instruments designed and calibrated to measure low level electromagnetic field radiation in the ELF (5 Hz to 2 kHz) and the VLF (2 kHz to 400 kHz) frequency ranges. Bandwidths and sensitivities associated with each model are noted in the comparison chart. Using "state-of-the-art" technology, ELF Series Field Monitors were designed at specific frequencies and selected bandwidths to provide the user with a quick, reliable and easy way to measure electromagnetic field radiation levels associated with power lines, TV sets, home appliances, VDT's (Video Display Terminals) as well as various industrial and institutional devices. For frequency range from 12 Hz to 50 kHz, see BBM-3D.

The BBM Broadband AC Magnetometer also offers the convenience of hand held portability with high sensitivity and accuracy. AC magnetic fields from 0.01 mGauss to 2.0 Gauss up to 50 kHz can be measured to an absolute accuracy of ±1.0% traceable to NIST with linearity of better than 0.02% in all ranges and resolution down to 0.01 mGauss. Four frequency ranges can be selected (power line, ELF, VLF and WB) and two analog outputs, RMS and wideband, are provided for data recording and analysis.

Specifications

Model #

ELF 40D

ELF 45D

ELF 50D

ELF 60D

ELF 66D

Certified & Traceable to NIST

No

No

Yes

Yes

Yes

Range
(in Gauss)

1mG to 2000mG

0.1mG to 200mG

1mG to 20G

0.1mG to 20G

0.1mG to 20G

Bandwidth

30Hz to 300Hz

30Hz to 300Hz

50Hz to 60Hz

40Hz to 400Hz

40Hz to 400Hz

Number of Axes

Single Axis

Single Axis

Single Axis

Single Axis

Single Axis

Analog Output

No

No

No

Yes 200mVFS

Yes 200mVFS

Sensor: Internal (I), External (E)

I

I

I

I

E

Display: Digital (D), Bargraph (B)

D 3/8"

D 3/8"

D 1/2"

D 7/10"

D 7/10"

Audible Tone With Earplug

No

No

No

No

No

Low Battery Indicator

No

No

Yes

Yes

Yes

Optional AC Adaptor

No

No

Yes

Yes

Yes

"Out of Frequency Range Indicator"

No

No

No

No

Yes

Accuracy (see Notes)

(1) ±1%

(1) ±1%

(2) ±1%

(3) ±1%

(3) ±1%

Power Source

9V Battery

Battery Life

100 hours

100 hours

50 hours

40 hours

45 hours

Weight

4.9 oz

4.9 oz

8.0 oz

15.0 oz

15.0 oz

Case Dimension

4.7"L
2.4"W
1.0"D

4.7"L
2.4"W
1.0"D

5.75"L
3.5"W
1.5"D

7.0"L
4.0"W
2.0"D

7.0"L
4.0"W
2.0"D

Warranty

90 Days

90 Days

180 Days

180 Days

180 Days

NOTES:
  
(1) ±1%, ±1 Digit, Typical at 50 Hz or 60 Hz, ±30% within bandwidth (30Hz to 300 Hz)
   (2) ±1%, ±1 Digit, at 50 Hz or 60 Hz
   (3) ±1%, ±1 Digit, at 50 Hz or 60 Hz, ±5% within bandwidth (40 Hz to 400 Hz)
   (4) Accuracy, Each Axis, 1% ±1 Digit Typical at 50 Hz or 60 Hz (over 100 counts);
       ±2 Digits Typical at 50 Hz or 60 Hz (less than 100 counts)

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