Speed or acceleration sensor

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Speed or acceleration sensor


MJ-VR30 Accelerometer

1.Equipment vibration measurement: MJ-VR30 Accelerometer is widely used in various industries equipment working condition monitoring. The vibration value when the device is running is an important index for measuring the equipment running normal or not. MJ-VR30 Accelerometer can measure the vibration value from direct current to 2KHz, the output signal will give an accurate visual instructions for equipment’s amplitude by filtering and detection.

2.Impact measurement: Widely used in automobile airbag and seat belts system. MJ-VR30 Accelerometer will be impact when a crash happens, then it will output a pulse signal that in proportion to the impact acceleration within 1 ms, when the impact acceleration reaches a certain value, the signal will make the airbag outbreak or lock the seat belt to protect the people in the automobile.

3. Dip Angle measurement: When accelerometer is placed gradient, the output value of accelerometer is the component of gravity acceleration on the accelerometer gauging spindle, it means there is anti-sine functional relation between output and slant angle, when the slant angle is small, it is linear relationship approximately.


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Brief Introduction 

MJ-VR30 Accelerometer can measure the acceleration of direct current that up to 2.5KHz within ±1g±18g. It has excellent stability, reliability and strong anti-jamming capability. As the common acceleration transducer need to calibrate on the standard vibration table, brings lots of inconvenience to the users. MJ-VR30 Accelerometer is much better than that. With the use of advanced microelectronic processing technology and capacitance measuring principle, it can obtain excellent low frequency responses, adjust the transducer by gravity acceleration g. Its built-in self-checking system can easily check itself normal or not. 

Working Principle

MJ-VR30 Accelerometer is based on capacitive measurement principle to measure acceleration. Its output signal is proportional to the acceleration. The diagram is as follow:

Installation Method 

Fasten it on the device by bolt.

Bottom View

Front View

Calibration Method 

There is no secondary calibration for MJ-VR30 Accelerometer under normal circumstances. If it is necessary, measure the actual sensitivity by gravitational acceleration g, adjust it by the second instrument. For example, the measure range for one accelerometer is ±2g, standard sensitivity is 1V/g, make it perpendicular to the horizontal plane, the output direct current voltage is 2.5V and put it on level, the output direct current voltage is 1.55V, then the actual sensitivity of the accelerometer is (2.5-1.55)V/g.









Measuring range:  50mV/g……5V/g, 20mV/g-3V/g

Non linearity: 0.2% FS

Frequency response(Frequency range): 0 ~ 5 kHz (-3 dB)

Resolution: 0.05%

Working temperature-20-+80℃

Excitation Voltage:  15-30VDC

Current Excitation : 2-10mA

Temperature drift: ≤0.01%℃(-20+125℃)

Maximum impact tolerable: 10000g

Output: 05 V

Protection grade:IP64

Housing material:stainless steel

Weight: about 40g

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