Instruction     BST100 is the first hand-held type Gauss meter of BST series Gauss meters. This instrument is the magnetic field measuring instrument specially designed for field measurement. Its design concept of lightness, practicality and portability has been determined at the beginning of instrument design and its unique design of micro power consumption allows its battery life to be greatly improved.        When placing the semiconductor carrying current in the magnetic field axial to the current direction, the semiconductor will generate transverse galvanomagnetic phenomenon, namely generate electromotive force in the direction axial to the magnetic field and current, which is Hall Effect. Hall Effect can be explained with classical galvanomagnetic theory. Generally, Hall voltage UH is expressed as: UH=RHIB0/d= RHIIB0 Of which: d—the thickness of the Hall device RH—Hall constant RHI=RH/d—Constant of the Hall device I—Current intensity passing through the Hall device B0—The measured magnetic induction intensity  It can be seen from the formula: For a certain Hall device, the magnetic field B0 can be indirectly measured through measuring the Hall device if only the passing current I is constant. Since it can count continuously and linearly with simple method and long service life when measuring the magnetic field with Hall Effect and can measure the magnetic field of small space and small gap, Hall Effect Method has become one important method among magnetic field measurements.        Main characteristics          With small volume, light weight and convenient carry, this instrument can meet the measurement requirements of various sites; Adopt micro power consumption design. With long service life, the battery can be continuously used for more than 10 hours; Can select transverse probe or axial probe; Have judgment function of magnetic field polarity.        Main application areas       Surface magnetic field of permanent magnetic materials.Magnetic field within the structure of the gap Generated by permanent magnets used in magnetic field, ferromagnetic materials absorb the magnetic field generated by the equipment (such as the separator, magnetic separator, permanent magnetic chuck, electromagnetic, etc.) Ferromagnetic material remaining weak magnetic field magnetic field              Main technical index   Supply voltage: DC 9V laminated cell(Not included package) Display meter: 3 1/2 digital display Measurement scope:0~200mT~2000mT(1mT=10Gs) Accuracy: 1% Resolution: 0.1mT Temperature error: -0.06%/°c Operating environment: Temp.: -10°c~40°c Humidity: 35~75% Size:131mm*66mm*26mm     Weight:about 150g