Key features

Measurement ranges from ±1 g to ±20 g
Virtually zero temperature coefficient of the damping ratio
Filtered and unfiltered outputs available simultaneously
Integrated temperature compensation
DC input – DC output
Signal ground isolated from supply ground
High reliability

About the AAA640 MEMS accelerometer

The AAA640 series accelerometers measure vector acceleration with high accuracy. They incorporate a silicon sensor using air-damped MEMS technology. As a result, unlike liquid-damped sensors, they are largely independent of temperature by design. Mechanical stops provide excellent shock resistance. Sensitivity and zero point are compensated against temperature influences.

The AAA640 is powered by an unregulated DC voltage and connected via a bayonet connector. It offers a wide usable frequency range and is equipped as standard with a 5 Hz low-pass filter. Optionally, the accelerometer can be supplied with an output preset to 1 g to compensate for acceleration due to gravity.

Typical application areas include data acquisition systems, accident data recorders, lifetime monitoring and prediction, braking monitoring and control in public transport systems, track bed analysis and fault detection equipment for high-speed railways, military and civil flight simulators, autopilots and low-frequency vibration monitoring.

In addition to the accelerometers offered in the datasheet, we provide custom accelerometers for special applications. These custom sensors can be manufactured and tested according to specific requirements and standards, for example in the automotive industry.

Features

Measuring ranges from ±1 g to ±20 g
Linearity deviation 0.5%
Output signal ±5 V
Supply voltage 6 … 32 VDC

Applications AAA640

Data acquisition systems
Crash recorders
Fatigue life monitoring and prediction
Monitoring and controlling deceleration in mass transit systems
Road bed analysis and fault detection equipment for high speed railways
Military and civil flight simulators
Low frequency vibration monitoring

Do you need this sensor for your next project?

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Not exactly what you are looking for? We offer standard sensors, but can also help you with sensors adapted for you or a fully customised measurement solution. Contact us for advice or pricing.

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Technical Specifications

Specification	Value
Acceleration	Will withstand constant 20 times rated range in all 3 axes without damage
Compensated temperature	0°C to +50°C
Damping ratio	0.7 (± 0.2) @ 25°C
Humidity/immersion	IP65
Hysteresis	≤ 0.02%
Input current	100mA dc max.
Measurement range	±1g / ±2g / ±3g / ±5g / ±10g / ±20g
Non-linearity	±0.5%
Operating temperature	-40°C to +100°C
Output [supply voltage]	±5V filtered and unfiltered [6 - 32 VDC unregulated]
Resolution	≤ 0.001%
Shock	200g for 2ms (½ sine wave)
Storage temperature	-55°C to +130°C
Weight	120 g max.

AAA640 MEMS Accelerometer