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FFT Inclinometer

Vigor Technology MEMS Inclinometer / FFT Inclinometer


  • Simultaneously measuring inclination and vibration value,can be real-time and post-processing 
  • Tri-axis 0~±20g vibration detection, frequency response ≤5 kHz 
  • Programmable filter, 11 rate settings 
  • Real-time FFT, 512 points 
  • Programmable FFT averaging, programmable alarms,6 spectral bands 
  • Can inhibit vibration acceleration interference 
  • Patented real high accuracy inclination measuring 
  • Highest combined absolute accuracy ±0.01°@25℃ 
  • Customizable all kinds of low-frequency vibration tilt products 


Railway track inspection instrument, Construction machinery, Mining machinery, Agricultural machinery, Train control, Test equipment, Movement or rotational vibration occasions
FFT Inclinometer
Inclinometer specifications
Measurement range ±5° ±10° ±15° ±30° ±45° ±60°
Combined absolute
accuracy ①(@25 ℃ )
±0.01° ±0.015° ±0.02° ±0.04° ±0.06° ±0.08°

Absolute linearity(LSF,%FS)

±0.06 ±0.03 ±0.03 ±0.03 ±0.02 ±0.02

Cross-axis sensitivity②

Offset ③ ±0.005° ±0.008°
Repeatability ±0.0025°
Hysteresis ±0.0025°
Allowed installation misalignment④ ±4.0° ±3.0° ±2.5° ±1.5° ±1.2° ±1.2°
Input-axis misalignment ≤±0.1°
Sensitivity temperature drift
≤100ppm/℃ ≤50ppm/℃
Offset temperature drift
≤0.003°/ ℃
Offset turn on repeatability⑤ ±0.008°
Resolution 0.0025°
Long-term stability(1 year) ≤0.02°
Measurement axis 1 or 2 axis
Cold start warming time 60s
Vibration specifications
Frequency range ±5% 0~5kHz
Resonance frequency 5.5kHz
Measurement range 0g/±1g/±5g/±10g/±20g, adjustable
Nonlinearity 0.2%
Measurement axis Tri-axis (X/Y/Z)
Cross-axis sensitivity 2.6%
Noise density 0.248mg/√Hz
Bandwidth 10Hz~10.240kHz, adjustable
FFT analysis 512 points
FFT data storage 14-groups (X/Y/Z)
Real-time sample rate 20.48kSPS
Vibration acceleration resolution 0.16mg(best)
Recovery time 54ms
Maximum overload 2000g
Misalignment 0.5°
General specifications
Output data FFT data, X/Y/Z vibration acceleration value, X/Y tilt angle value
Output CAN, RS232, RS485, RS422, Ethernet
Power supply 9~36VDC
Power consumption Average working current≤120Ma(25℃&24VDC)
Operation temperature range -40~85℃
Storage temperature range -60~100℃
Insulation resistance 100MΩ
MTBF ≥25000 h/times
Shock 100g@11ms, three-axis, half-sine
Vibration 8grms, 20~2000Hz
Protection IP65(Optional IP67)
Connecting Military class connector(MIL-C-26482)
Weight 600g(without connector and cable)

① Combined absolute accuracy means the compositive value of sensor's absolute linearity, repeatability, hysteresis, offset and cross-axis sensitivity error.(in room temperature condition) as
②The cross-axis sensitivity means the angle that the tilt sensor may be banked to the normal tilt direction of sensor. The cross-axis sensitivity (± 0.1%FS)shows how much perpendicular acceleration or inclination is coupled to the inclinometer output signal. For example, for the single-axis inclinometer withrange ±30°(assuming the X-axis as measured tilt direction), when there is a 10° tilt angle perpendicular to the X-axis direction(the actual measuring angle is no change, example as +8.505°), the output signal will generate additional error for this 10° tilt angle, this error is called as cross-axis sensitivity error.SST300`s cross-axis sensitivity is 0.1%FS, the extra error is 0.1%×30°=0.03°(max), then real output angle should be +(8.505°±0.03°). In SST300 series,this error has been combined into the absolute accuracy
③ Offset means that when no angle input (such as the inclinometer is placed on an absolute level platform), output of sensor is not equal to zero,the actualoutput value is zero offset value.
④ Allowed installation misalignment means during the installation, the allowable installation angle deviation between actual tilt direction and sensor's nature measure ment direction. In general, when installed,SST300 sensor is required that the measured tilt direction keep parallel or coincident with sensor designated edge, this parameter can be allowed a certain deviation when sensor is installed and does not affect the measurement accuracy.
⑤ Offset turn on repeatability means the repeatability of the sensor in repeated by supply power on-off-on many times.