Download BF-10 Magnetic Field Induction Sensor

BF-10 Magnetic Field Induction Sensor
BF magnetic sensors are constructed using a highmagnetic-permeability, mu-metal core with proprietary
windings. The coil windings are shielded and epoxy potted
inside a Black Amalgon housing.
Performance
Frequency range: 0.1 to 10 kHz
■
3-dB frequency corners: 0.2 Hz to 10 kHz
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Sensitivity (flat region): 0.3 V/nT (standard)
■
Power consumption: 9 mA at ±12 V
■
Each sensor includes a matched low noise preamplifier, normally mounted at one end of the coil tube using a
waterproof O-ring assembly. The sensor is optimized to maximize noise performance for a given length/weight
specification.
Mechanical Specifications
Housing: Black Amalgon® straight tube
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The BF-10 sensor utilizes a magnetic feedback design to yield a stable flat response over several decades of
frequency; here, the sensors respond as a B field detector. At frequencies below the flat region, the response
is proportional to frequency. The BF-10 sensor is ideal for controlled source audio-frequency magnetotelluric
(CSAMT) surveys.
Length: 142 cm (56 in)
■
Diameter: 6 cm (2.4 in)
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Weight: 7.9 kg (17.4 lbm)
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Connector: 8-pin Tajimi
APPLICATIONS
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The BF-10 may be customized for a variety of applications, including: geophysical surveys (magnetotelluric,
audio-magnetotelluric, controlled-source audio frequency magnetotelluric, magnetometric resistivity, magnetic induced polarization, controlled-source electromagnetic, tensor-source high-frequency magnetotelluric,
Stratagem™), marine surveys, earthquake studies, and high-accuracy magnetic field studies.
pinout Specifications
8-pin Tajimi connector pinout:
23A16-8AM
■
Connector mating part:
23B16-8AF
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Dust cap: 16RC
■
Signal–
B
Ground
Ground
V+ (+12 V)
C
V– (–12 V)
G A
Signal+
F
Cal–
Cal+
H
E
D
FREQUENCY RANGE
NOISE PERFORMANCE
1
10
80
1
60
Amplitude
10 -1
20
Phase
10-1
0
-20
-40
-60
-80
10-2
10-1
1
10
102
103
Frequency, Hz
104
105
-100
Sensor noise, nT/Hz
40
Phase, °
Amplitude, V/nT
100
BF-10
BF-4
10 -2
BF-6
10-3
BF-7
10-4
10-5
10-6
10-7
10 -8
10-4
10-3
10 -2
10 -1
1
10
Frequency, Hz
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Copyright © 2008 Schlumberger. All rights reserved. 08-OF-107
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103
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