Photo (MP-9820 Non contact-type Magnetoelectric detector)




MP-9820 is a magneto-electric-rotation detector using an internal hall element, a permanent magnet, DC amplifier, and voltage regulator in its compact body. Using MP-9820 in combination with detection gear enables deriving stable rectangular waveform from ultra low speed all the way through high speed. (1 Hz to 100 kHz)


MP-9820 finds wide range of applications and rotational measurement objects by using with TM-3100 series tachometer and FV-1500 FV converter.



  • Wide range of signal detection from 1 Hz to 100 kHz
  • Achieve the highest level of frequency response_Can be used in wide range of applications from low to high speed and rotational measurement objects.
  • Neither load on measurement objects nor worries about attrition or lubrication with non-contact detection method.
  • Using an internal hall element and waveform processing circuit in its compact body.
  • Adopting new type of cable greatly improves in tolerance performance against electrical noise


Relationship between detection distance and gear modules

Please use the detective gear which is satisfied with the following specifications.


Shape of gear Involute gear or equivalent
Module * 0.5 to 3
Tooth width 3mm or more
Material Strong magnetic properties
(e.g., S20C, SS400 etc.)

* Module = Pitch circle diameter / Number of teeth




The detection distance depends on the modules of detective gear, with longer distances being possible with larger modules. Also detection distance depends on temperature. In cases where the ambient temperature varies greatly, it should be mounted with minimum of detection distance. The detectable range shown in the right figure assumes an output waveform duty cycle of 50 % ±20 %.

Illustration (Relationship between detection distance and gear modules)







Technical data (Relationship between detection distance and gear modules)


Outline of specifications

Detection method An internal hall element and electromagnetic property gear
Detective gear Strong magnetic properties (e.g., S20C, SS400 etc.) involute type
Module: 0.5 to 3, Tooth width: 3mm or more
Detection distance Depends on gear module
Measurement range 1 Hz to 100 kHz (1 to 100,000r/min at 60P/R detective gear)*
Output method Voltage output (collector output method)
Output signal Rectangular waveform Hi level:+5 ± 0.5 V or less,  Lo  level:+ 0.5 V or less
Output impedance Approx. 330 Ω
Applicable tachometers TM-3100 series, TM-5100 etc.
Applicable F/V converters FV-1500, FV-1400**, FV-5300**
Power requirement 12±2 VDC, approx. 40 mA
Protection circuit Power supply polarity protection
Operating temperature range -10 °C to +70 °C
Storage temperature range -20 °C to +80 °C
Operating humidity range 20 to 80 % RH(with no condensation)
Storage humidity range 20 to 80 % RH(with no condensation)
Withstand voltage 250 VDC
Resistance to vibration At 49 m/s2 in X, Y and Z for each direction. (during operation)
Resistance to shock 490 m/s2 in X, Y and Z direction each three times. (Non-operating)
Outer dimensions 75 (W) × maximum diameter 24 mm
Weight Approx. 80 g (including mounting nuts)
Signal cable Sold separately (30 m or less, MX-7100 / 8100 series connection cables in used)

*100 kHz means the frequency which is equivalent to 100,000 r/min if the detective gear at 60 P/R is used.

Connection signal cables

MX-7105(one side crimp terminal )5 m
MX-7110(one-side crimp terminal)10 m
MX-7115(one-side crimp terminal)15 m
MX-7120(one-side crimp terminal)2 0m

MX-8105(both ends connectors) 5 m
MX-8110(both ends connectors)10 m
MX-8115(both ends connectors)15 m
MX-8120(both ends connectors)20 m



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