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ASC 4421MF Capacitive Accelerometer

Uniaxial analog voltage output acceleration sensor with a lightweight aluminium housing (IP67)

ASC 4421MF Capacitive Accelerometer | Althen Sensors

About the ASC 4421MF Capacitive Accelerometer

ASC’s Medium Frequency (MF series) capacitive accelerometers are based on the capacitive sensing technology and produce an analog voltage proportional to the input acceleration. The accelerometers can measure both static (gravity) and dynamic accelerations. ASC’s MF series can be used for very low to medium frequency vibration measurements from 0Hz to 2.5kHz. The MF series features a MEMS sensor element where the seismic mass is connected between two conductive capacitor plates. When subjected to an input acceleration, the seismic mass oscillates between the two capacitor plates and there is a change in the capacitance. This change in capacitance is converted via an ASIC (Application Specific Integrated Circuit) into a low impedance analog voltage output signal.

ASC’s capacitive accelerometer 4421MF is an analog voltage output sensor. The sensor can be powered by a DC power supply (+5V to +40V) where the output voltage is independent of the supply. The sensor operates in a differential configuration with ±2.7V full-scale output. For the full-scale acceleration range, the output swings between 0.3V and 3V. The differential configuration results in an improved S/N ratio and a better performance.
ASC Type 4421MF operates in a wide temperature range from -40°C to +125°C. The sensor exhibits exceptional temperature stability, very low non-linearity (<0.5%) and can withstand repetitive shocks as high as 6000g’s.
ASC Type 4421MF features a lightweight aluminium housing. Also available is Type 4425MF which features a rugged, corrosion proof stainless steel housing. The sensors are supplied with 6m integral cable as a standard.

Key features ASC 4421MF Capacitive Accelerometer

  • Range: ±2g to ±200g
  • DC Response
  • Gas Damped
  • Excellent Bias and Scale Factor Stability
  • Low Power Consumption
  • Differential Mode
  • Lightweight Aluminium Housing (IP67)

Options ASC 4421MF Capacitive Accelerometer

  • Customised Cable Length
  • Customised Connector
  • TEDS Module

Applications ASC 4421MF Capacitive Accelerometer

  • Structural Monitoring and Testing
  • Endurance Testing
  • Brake Test
  • Vibration Monitoring
  • Civil Engineering
  • Modal Analysis
  • Vehicle Testing
  • Automotive Ride Quality & Comfort
  • Railway Engineering
  • Flutter Test
  • Seismic Monitoring
  • Tilt Measurements



Measurement Range
±2g | ±5g | ±10g | ±30g | ±50g | ±100g | ±200g
Sensitivity (mV/g)
1350 | 540 | 270 | 90 | 54 | 27| 13.5
Excitation voltage
5 - 40 VDC
Amplitude non-linearity
<0.5 % FSO
0.3 - 3 V
Zero Acceleration Output
±50 mV
Spectral Noise
10 to 680 μg/√Hz
Operating Temperature
-40 to +125 °C
Weight (without cable)
10 gram
Protection Class
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