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New product:
Ultra Low Noise 2D transducer
Magnetic Field Mapping System
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What are Senis Magnetic Field Transducers ?
SENIS self-contained Magnetic Field Transducers / Hall probes are designed to be used as a building block of a user's own high-quality teslameter. They are available with three different probeheads as single-axis, two-axis or three-axis instruments in the accuracy classes 10%, 1%, 0.1% and 0.01%. When connected with a power supply, the magnetic transducer provides at its output a high level analog signal - a voltage proportional to the measured magnetic field. A complete magnetic measurement system consists of a SENIS self-contained transducer, a power supply and a good voltmeter. Instead of the voltmeter you may also connect it to an oscilloscope, a spectrum analyzer or a digital data acquisition system. So the signal may be checked for the presence of a.c. perturbations or it can be analyzed to determine the wide-band characteristics of the field
The typical requirements for the power supply are a voltage of � 12 V (� 1 V) with Ripple (peak to peak) < 5 mV. The current consumption (per Hall generator) is less than 20 mA. The voltmeter shall have an input resistance > 10 MW and an input capacitance < 100 pF. For high-precision d.c. measurements, a nanovoltmeter or a sensitive digital voltmeter with the integration time of several periods of the mains should be used. For fast measurements, use a high rate sampling voltmeter.
The SENIS self-contained transducers feature an excellent long term stability. For measurements with a 0,1 % precision, no recalibration is ever needed. For 0,01 % precision measurements, a yearly recalibration is recommended. A magnetic field transducer consists of two modules connected by a flexible cable. The magnetic field sensitive module contains, depending on the probe type, one or two high quality Hall generators. The carefully machined robust case of this module enables a high precision positioning of the field sensitive volume in the magnetic field. The electronics module contains current sources, error-correction circuits, and output amplifiers. This module carries the cables to connect the probe with the power supply and the voltmeter.
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