Is it possible for the sensors to detect terrestrial magnetism?
Is it possible for the sensors to read magnetic stripe information on cash cards?
Is it possible for the sensors to recognize 
as a circle?
Which polarity does the detecting surface have?
Is it possible for the sensors to detect paper money in wet conditions?
Does electrostatic noise affect the sensors' output signal during paper money detection?
Is it possible for the sensors to detect paper money without being in contact with the target?
How wide (mm) is the maximum detecting width?
Can the detecting surface be rounded like a coil head?
How high is the wear resistance?
Can we specify the rank of output voltage?
Is it possible for Murata to supply sensors with lead wire and connector mounted?
How large is the resistance change ratio?
How wide is the multichannel sensor's minimum insensitive interval between channels?
How to select the optimal sensor
Terrestrial magnetism cannot be detected. Magnetic differentiation sensors are suitable for AC magnetic filed detection.
Magnetic stripe information cannot be read. The sensors' built-in permanent magneto will generate magnetic flux leakage of approx. 95kA/m, which causes damage to the magnetic information on cash cards. Only if the magnetic information has a coercivity of 95kA/m or higher, can that information be read.
as a circle?If a circle is printed with magnetic ink, the sensors convert the shape of the circle into an electrical signal. The difference in electrical signals between circle and square patterns is as follows:
When circle, square, and stripe patterns are scanned, the sensor outputs the following signals.
The circle pattern is differentiated from the square pattern by the output level, and the circle pattern is differentiated from the stripe pattern by the number of peaks and output level.
With the BS05N1 and BS05C1 types, the detecting surface functions as the S pole. With other types of sensors, it works as the N pole. The polarity has no influence on the sensors' performance (output, response, etc.). However, when the sensors read magnetic patterns, the rise of the output signal varies depending on the polarity.
There is no problem except BS05C types, because the sensors are protected by the can case.
Electrostatic noise will affect the sensors' output signal. Be sure to ground the sensors through the F.G. terminal provided on the can case.
The sensors can detect a pattern pitch of up to 0.1mm. For details, refer to "Element Pitch and Output Signal" in the Application Guide.
The sensors are enabled to do non-contact detection. For details, refer to "Gap Characteristic" in the Application Guide.
Sensors with a detecting width of 6mm or 10mm have been available from Murata. According to users' needs, we can offer custom-made models with a detecting width of 20mm or less.
Yes, it can. However, if the detecting surface is rounded, detection efficiency will be deteriorated. The sensors' detecting element is a plane. The sensors' output is proportional to the square of the distance between the detecting element and the target medium. If the detecting surface is rounded, the gap between the detecting surface and the element is increased, and the output will be decreased by this gap. Sensors with a rounded detecting surface have not been available from Murata, but if you need this type, consult Murata Manufacturing Co., Ltd.
Murata offers various sensors that can withstand 800,000 to 300 million passes of paper money (based on testing methods specified by Murata). For details, refer to "Wear Resistance Characteristic" in the Application Guide.
Yes, you can. Consult Murata Manufacturing Co., Ltd.
According to users' needs, we can offer custom-made models. Consult Murata Manufacturing Co., Ltd.
It is possible. Consult Murata Manufacturing Co., Ltd.
Provided that the resistance for non-magnetic fields is "1", the resistance will change approx. four times when a magnetic flux density of 0.3T is applied. In the range where the magnetic flux density is 0.08T or less, the ratio of resistance change will be decreased. The sensors provide a bias magnetic field so that the sensors operate in the range where the ratio of resistance change relative to magnetic flux density is high. For details, refer to the section titled "Characteristics of Magnetoresistive Elements".
BS05M1KFFA is approx. 0.4mm, BS05M1HFAL is approx. 2mm, and other multichannel sensors don't have insensitive interval.
Refer to the Selection Guide. According to users' needs, we can offer custom-made models. Consult Murata Manufacturing Co., Ltd.
Refer to "Recommended Circuit" in the Application Guide. Since the signal level is minute, the amplification factor must be high. For the operational amplifier, the CM358 or equivalent low-noise type is recommended. For sensor output coupling capacitors, Tantalum capacitors or ceramic capacitors that generate little leakage current are recommended.
If the paper thickness is 0.1mm, when patterns on both the front and back of the paper are simultaneously detected, the signal level for the back pattern is approx. 85% of that for the front pattern. For details, refer to "Gap Characteristic" in the Application Guide.
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