Electromagnetic
field detectors
______________________
How electromagnetic surveys are conducted
Request for
an electromagnetic survey service
_______________________________________________________
Essentia EM2 Meter
1Hz to over 18GHz from 0.05 microWatt per centimeter square to 100 milliWatt
per centimeter square power density.
TriField 100XE 60Hz electric (but electric field sensitivity
at 5V/m), magnetic fields + magnetic ELF (1-1,000Hz) + radio & microwave
power (50 Hz also available)
The analog TriField is used
for the measurement of:
- elevated magnetic field sources (wall adaptors, appliances, inside commercial jets, running cars, especially near the front floorboard, grounding wire between the electric panel and the water main, under power transmission lines, street corners, subways..);
- high electric field sources - 500 - 100,000 V/m (under power lines, near computers and video display terminals, improperly grounded electrical equipment, fluorescent lights, electric blankets when plugged in, but "off", especially if the AC plug is reversed, high radio/microwave power sources );
- radio/microwave sources (analog and digital cellular phones, CB or amateur radio transmitters, microwave ovens near door seal -- a reading of more than 0.2 mW/cm2 with the needle halfway up, at a distance of 6' - 2 meters suggests a leaking microwave door seal that should be repaired).
The magnetic and electric field settings are frequency-weighted from 30
to 500Hz and are calibrated at 60Hz. For example, a 60Hz magnetic field with a
strength of 2 milliGauss (mG)
will read, "2" on the meter, but 120Hz at 2 mG
will read "4" on the meter. This is to gauge the currents induced
inside the body, which are proportional to field strength multiplied by
frequency. From 500Hz to 2000Hz, the response is flat +/- 20 %. Above 2000Hz,
the magnetic and electric sensitivities of the meter slowly decrease with
increasing frequency, falling to zero near 100KHz, but
with some residual sensitivity up to 100MHz. In theory, the body's sensitivity
to fields should begin to decrease at frequencies above about 500Hz. Accuracy
is +/- 20 % of scale reading for Magnetic, and +/-30 % of scale reading for
Electric (RMS @ 60Hz). The Radio/Microwave probe is sensitive from 50MHz to
3GHz and is calibrated at home microwave over frequency (2GHz). The accuracy is
-50% to +100% because of the unpredictable effect of reflections within the
room and off the user.
The TriField 100XE registers
electrical fields as low a 5 Volts/Meter. Biological
and psychological effects and risks have been reported starting at 10 V/m
fields, a common powerfrequency electric level in
most bed pillow sites throughout North America. In countries where the voltage
is higher (220V), higher ambient electric fields are noted while in the 110V system, the power-
frequency magnetic fields tend to be more prevalent in areas used by the
general public.
TriField Natural2
(experimental) measures static (non-varying) electric, static
magnetic as well as natural static microwave phenomena, with an audio function.
Includes AC adapter & jack, and external coil jack
The TriField Natural2 meter is very
helpful in identifying unusual natural environmental phenomena and interactions
between natural and artificial electromagnetic fields. Monitors
magnetic and electric field transients of living or magnetized objects.
The sum setting is excellent for motion-detection and bioenergetic
research. Omnidirectional. Tone signal. Analog.
TriField Broadband
100XE measures electric fields up to 2,5GHz,
magnetic fields up to 100kHz.
This meter locates
surveillance "bugs", "hot" conductors and radiofrequency
interference (RFI). It upgrades the quality of detail of professional surveys
in enabling proper tracing of wiring and appliance-related problems, by
determining which wires or circuits carry current, and the detection of
improper grounding.
The TriField
meters operate with a 9V battery, and should last for about 30 hours
(with alkaline battery). The units are warranted against defects
in materials and assembly for one year from the date of purchase.
AC Magnetic Field Meter IDR109 for 60Hz magnetic fields - directional air-coil sensor, 32K data point
log (50Hz available).
VLF Gaussmeter AC Magnetic Field Meter IDR200 1- 200 kHz magnetic fields – 3-axis air coil sensor,
32K data point log, RD-232 communication port.
ELF Gaussmeter AC Magnetic Field Meter IDR210 20- 4.000 Hz magnetic fields – 3-axis air coil sensor,
32K data point log, RD-232 communication port.
AC MilliGauss Meter – UHS measures 13Hz – 75 kHz AC magnetic fields with 3-axis probe; also VLF only (1 – 75 kHz) & single
axis for 13Hz to 75 kHz, can indicate direction of current flow.
Air Shipment Oersted
(MilliGauss) designed for measuring horizontally at a distance (e.g. for air shipment
packaging).
High Resistance / Low Conductance 1000 TeraOhm
Meter measures 19,999 MegOhm
– 1999.9 GigOhm resistance and conductance in 19.999 nanoSiemens and 19.999 picoSiemens.
Surface DC Voltmeter measures static
charge on a surface or object; measures voltage on
conductive surfaces, electric field on insulators (some glass, paper and most
plastics); and can also measure ohms/square resistance of
anti-static surfaces (resistance on most plastics, including paints).
Ultrastable Surface
DC Voltmeter measures voltage on conductive surfaces,
electric field on insulators or atmospheric electricity, unaffected by air
ions.
This device is
helpful in not only determining static electric situations but also in
identifying which steps in a process introduce or remove charges. A 1"
spacer standardizes distance between the meter and object being measured.
Surface voltage is measured on a LCD display in kilovolts. Accuracy is ± 2% of
the reading, provided that the surface measured is at least 25cm wide
(10"); otherwise, display will read lower than the actual voltage - however,
formulae are provided in a manual with unit to estimate actual surface voltage.
The range is -19,999 to +19,999 kilovolts, with 1 volt resolution. A reading of
more than 10,000 kilovolts means that sparking is likely. Attachments include:
space rod, cord to earth ground and a brass sensor disk. The meter uses a
standard 9-Volt battery (which is included) and has a low battery indicator on
display. Battery life is typically 3 hours of measurement time. Warranty is for
1 year.
RF Field Strength Meter radio/microwave measures the power density
of radio waves from 0.5MHz to 3,000 MHz (3 GHz).
Accuracy in the cell
tower range (800 - 1,700 MHz) is ± 20% of the reading. At the frequency limits
of 0.5 MHz and 3,000 MHz, it reads 3dB low (-50%). There are 3 ranges that span
from 0.001 to 2,000 microwatts/cm². The bandwidth switch allows a high-pass
function (with a 6dB per octave roll off below 100MHz) so that the high
frequencies such as cell towers are allowed through. This switch can also be set
to "Wide" bandwidth, allowing all frequencies down to 0.5MHz,
including AM radio. Normally, this is set on "Fast" however,
to permit monitoring of changes rapidly. Controls on the side of the unit allow
neutralization of the offset (which is temperature dependent and is usually
only a few nanoWatts (0.001 microWatts) per cm2.
The meter uses a standard 9-Volt battery (which is included) and has a low
battery indicator on display. Battery life is typically 3 hours of measurement
time. Warranty is for 1 year.
MicroAlert radio/microwave alarm beeper directionally detects signals
as weak as 0.001mWcm² from 100MHz to 5GHz.
This pager-sized beeper is helpful for locating cellular phone
towers up to 1 km away, analog and digital phones, microwave oven use and
surveillance "bug" and like devices. Battery lasts 3 years.
Electromagnetic Monitor (50 Hz - 3 GHz - with a decreased response up
to 10 GHz) detects directionally full spectrum electric emissions from
power-frequency appliances and wiring to wireless equipment, with a sensitivity
as low as 0.01 micro Watt/square centimetre to a
maximum of 10 milliWatt/square centimetre
on a scale of 6 LEDs coloured from blue to red.
Accuracy is ± 30% in the 50Hz to 3GHz range, includes a 9V battery,
sufficient for 50 hours of continuous use.
AC Electric Field Meter (40 Hz – 100 kHz) measures accurately and faster the broadband electric field
than existing meters. Large LCD display.
This device has an
absolute accuracy at 40Hz to 20kHz of ± 2% of the reading, with ± 1 count (1
count being 1 volt/meter). For frequencies of up to 50kHz,
accuracy is still ± 2% of the reading, but the last digit will read lower by 2 counts
at 25kHz and by 4 counts at 50kHz. At 100kHz, the
meter will read low by 5% and low by 9 counts. The meter uses a standard 9-Volt
battery (which is included) and has a low battery indicator on display. Battery
life is typically 20 hours of measurement time. Warranty is for 1 year.
Air Ion
Counter (2 Million or Special
20 Million ions/cubic centimeter models - please specify which range model) for atmospheric electricity.
This
counter provides precision positive or negative ions measurement, with
sensitivity comparable to instruments 10 times more expensive (dynamic range is
between 10 and 2,000,000 ions/cubic centimeter or
between 100 and 20,000,000 ions/cubic centimeter - please specify when ordering
which range is suitable for your requirements). Ion collection efficiency is
65%. Large digital display. Can
reset to zero in windy conditions. 2 9V
batteries, with lifetime from heavy duty of 10 to 30 hours. (See web
page on negative and positive ions)
Radalert 100™ Geiger detector (gives counts per minute, as total count or in mR/hr)
for Alpha, Beta, Gamma and X-radiation with a digital display. New updated design features: 3-second
LCD response time, detectability range to 110 mR/hr, 1,100 µSv/hr and 350,000 CPM, 3,500 CPS and the ability to
take a timed total count from 1 minute to 40 hours. Utility menu options allow
turn "on"/"off" auto averaging, changes between units of
measurement and adjust calibration factor.
Use the Radalert to:
monitor personal radiation exposure, monitor an area or perimeter, detect
radiation leaks, check for contamination, find radioactive items in the
workplace or home, check for radioactive deposits in the
ground, check for X-ray scatter and to locate spills and lost materials. The Radalert features: digital LCD display,
adjustable alert level, dose rate or accumulated dose. It is a Geiger Mueller
detector that can interface to a computer or data logger or to an external
warning device.
Radalert Specifications: Sensor: Geiger
tube with mica end window (LND 712) Detects Alpha, Beta, Gamma, and
X-radiation. Display: 6 mm (0.4-inch) liquid crystal display. Operating Range:
0-19999 accumulated counts or 0-19999 counts per minute (approx. 0-20 mR/hr). Calibration: with Cesium 137: 982 cpm per mR/hr; or, with Cobalt
60: 958 cpm per mR/hr.
Alert: pulsating beeper sounds the alert. Alert level is adjustable in 10-count
increments, from 10-9,990.
Count Light: red LED flashes with each count. Beeper: Chirps for each
count (can be muted). Outputs: Dual miniature jack drives CMOS-compatible
devices: 1) counts to computer or data logger, 2) alert to external warning
device. Power: 9V battery gives
3-6 months continuous use at normal background level; jack provided for
optional AC adapter. Size: 150 x 80 x 30 mm (5.9 x 3.2 x 1.2 inches). Weight:
270 grams (9.5 oz.) including battery.
Inspector Alert meter for laboratory and field surface contamination (counts
per minute, mR/hr. µSv/hr,
CPS and total) up to 24 hours, with a digital display. Features a user-alert feature that
can be set to alarm above the normal background radiation level. The
Inspector Alert uses a 2-inch pancake Geiger-Muller sensor and is highly sensitive
to even low levels of nuclear radiation. 2000-hour battery-life at normal
background levels of radiation, with a 9-volt battery.
Inspector
EXP external probe surface contamination monitor for emergency response personnel (similar in features, size and quality
as the Inspector Alert, but with the versatility of an external probe. Carrying
case has clear window panel for full view of readout and count light, with
access to switches. Includes hand straps, belt loop and a small pocket for a
check source. Probe may be attached to carrying case if desired. Protective
probe cover folds easily out of the way during one-hand operation. Gives
(counts per minute, mR/hr. µSv/hr,
CPS and total) up to 24 hours, with a digital display. Features
a user-alert feature that can be set to alarm above the normal background
radiation level. The Inspector EXP uses a halogen-quenched 2-inch
pancake Geiger-Muller sensor and is highly sensitive to even low levels of
nuclear radiation. The RAP-RSI probe is enclosed in anodized aluminium housing with coated, black foam grip, a 500 Volt
power supply in probe head, and Amphenol tuchel
connectors. 2000-hour battery-life at normal background levels of radiation,
with a 9-volt battery.
I
Inspector specifications: Detector: Halogen-quenched Geiger-Mueller tube with effective diameter
of 1.75" (45mm) mica end window density 1.5 - 2.0 mg/cm². The display has 4-digit crystal display, with mode indicators. Operating
Range: mR/hr: 0.001 to 100.0, 0 - 300,000
counts per minute, 0.01 to 1,000 mSv/hr, 0 to 5,000
CPS, and a total of 1 to 9,999.000 counts. Calibration: Gamma sensitivity is
referenced to 3,500 CPM/mR/hr with Cesium 137, with
smallest detectable level for I-125 being 0.02 mCi at
contact. Efficiency for 4 pi geometry at contact: Beta: C-14 (49 keV average, 156 keV maximum)
5.3%, Bi-210 (390 keV average, 1.2 MeV maximum): 32%, Sr-90 (546 keV
and 2.3 MeV): 38%, P-32 (693 keV
average, 1.7 MeV maximum): 33%; Alpha: Am-241 (5.5 MeV): 18%.
The display updates every 3 seconds, showing the average for the past 30
second time period at normal levels. Averaging period decreases as radiation
level increases. User can select fast, 3-second averaging periods. The timer
can set 1 to 10 minute sampling periods in 10-minute increments, and a 1 to 24
hour sampling periods in 1 hour increments. The alert beeper sound the alert,
with a user-adjustable alert level being set using 3 buttons. Accuracy is ± 15% up to 50 mR/hr; ± 20% up to 100 mR/hr. For
anti-saturation, the readout holds at full scale in fields up to 100 times the
maximum reading. The temperature range is -20º to +50º C, -4º to 122º F. Power: 9V battery gives
an average of 2,160 hours at normal background, and an average of 625 hours at
1 mR/hr, with beeper "off". Size: 150
x 80 x 30 mm (5.9 x 3.2 x 1.2 inches). Weight: 350 grams (11.4 oz.) including
battery. I/O
Ports: Stereo 3.5 mm jack for CMOS or TTL devices – sends counts to computer or
data logger. Mono 2.5 mm jack provides electronic calibration input. The Count
Light consists of Red LED flashes with each radiation event The Beeper beeps
with each radiation event and can be muted. There is an optional wipe test
plate.
GM1 Radiation Counter pancake
style for Alpha, Beta, Gamma, cosmic rays, and
X-radiation
AC Magnetic Field Meter (professional) for 60Hz magnetic fields with directional air-coil sensor. Data logging
functions (50Hz also available .
This meter, intended for both commercial and residential use power line
monitoring, is sturdy, portable and battery-powered. It features auditory and
visual alarms, and a remarkable linearity. The large-size liquid crystal
display indicates multiple range settings: 2, 20, and 200 milliGauss. The sensitivity ranges are set from 1 microGauss to 2000 milliGauss with an accuracy of 2% in any range. The device
is 7.5 x 10 x 17.5 cm in size and weighs (with the coil probe and battery) 650
grams. The shielded and grounded air coil sensor probe comes with a 20 cm
handle and a 90 cm cable. Power consumption is 200 mW
and the battery life is 48 hours with 9V alkaline units. The meter comes with
complete instructions and a description of a typical environmental 60 Hz magnetic
field study. An optional calibration kit is available. One-year
parts and labour warranty.
DC Gaussmeter IDR329T (kilogaussmeter) with a Hall
Effect sensor, with range settings of 20, 200, 2,000 and 20,000 Gauss. Bandwidth: 68Hz at 3dB.
DC Gaussmeter Model 1-ST (1- 19,999 Gauss) measures with resolution starting at 0.10G resolution, accurately and
with an LCD display updated 4 times/second for the measurement of magnets of
any strength or type, including their fractional variations. Single axis probe
is at the end of a 1m (40") flexible cable only 1.5mm (0.06")
thick. 15cm (6") unit with 9V battery (last 40hrs), flip-down stand
for bench top reading, 1 year warranty. measured is from 40Hz to 100kHz. Large
LCD display.
DC Magnetometer IDR307 T (Gauss) with Hall Effect axial/transverse
probe, with range settings of ± 200 -20,000 Gauss range, 0.01 Gauss resolution. IDR307 T (transverse/axial probe)
These meters measure the static (non-varying) magnetic field from
magnets and magnetized objects. Large-size liquid crystal
display. Come with a 9V DC adapter.
Earth Magnetometer with
0.01 mG/1nT resolution, probe rod..
Geomagnetometer IDR321 with directional pencil Hall probe.
Zero Gauss Chamber IDR800 to adjust and calibrate geomagnetometers.
DC Gauss meter (laboratory model) with directional probe, 0.01 to 20,000 Gauss. DC Gauss meter 1-ST with directional probe for solenoids, magnets, 0.01 to
20,000 Gauss (see box above).
These meters measure remote static (non-varying) magnetic field from
underground, high density sources, ore bodies, etc.. (See
geomagnetic disturbances). Large liquid
crystal displays.
MSI 20/25 (digital
extremely low frequency magnetic field meter) directional, single axis probe
with toggle switch: 60Hz only or 60Hz + harmonics content up to 4,000Hz. 1mG to
700 Gauss range.
The MSI 20/25 meter can be combined with Fluke 83
or 85 or Goldstar
232 multimeters to determine predominant
frequency present, or with oscilloscope to view wave form and for data logging
(1mV/mG). The sensor is separate with a 2-foot
extension lead. The meter becomes an Electric field meter with
the E-100 sensor attachment with a range of 0.7 to 700,000 V/m. Large liquid crystal display. With field
guide and carrying case.
MSI AJK-95 ELF (digital broadband extremely low frequency magnetic
field meter) directional single axis probe: 25Hz to 3,000Hz. 1mG to 700 Gauss
range.
The MSI AJK-95 ELF meter can be used for data logging
(1mV/mG). The sensor is separate with a 2-foot
extension lead. The meter becomes an Electric field meter with
the E-100 sensor attachment with a range of 0.7 to 700,000 V/m. Large liquid crystal display. With field
guide and carrying case.
MSI meter Accessories
E-100
Electric field sensor 0.7 to 700,000 V/m
BV-1 Body voltage adapter adapter reads in mV
and V,
AC.
RS-232C
Computer serial port interface - call us
Electrosensor (pocket-size Gaussmeter).
This easy-to-use directional meter comes with 10 LED light bar settings
ranging from 1.5 to 30mG. Operates on one AAA battery that is
included.
_______________________________________________________________________
How electromagnetic surveys are conducted
Request for
an electromagnetic survey service
________________________________________________________
All prices are listed in Canadian
funds. For US and International orders, please contact us
or by phone:
(888) 639-7730
or
(613) 238-4437
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