Question: Why is a low noise vibration sensor important?

Answer:

Noise is an unwanted signal output that does not represent true vibration. Lower noise allows smaller vibration signals to be read by an analyzer.

Accelerometer amplifiers, like all electronic amplifiers, have some noise. This noise is produced by the electronic components in the amplifier. It is not possible to make an electronic amplifier with zero noise.

An amplifier with the lowest noise is not necessarily the best amplifier for industrial applications. For example, the circuits that provide protection from high voltage and accidental reverse polarity powering also add noise to the circuit. If the manufacturer removes these protection devices from the circuit, the noise will be reduced – but the resulting accelerometer will also be much more easily damaged.

One common characteristic of all internally amplified accelerometers is that noise is higher at low frequencies. Unfortunately, low vibration frequencies are also where acceleration tends to be the lowest amplitude. For this reason, it’s important that industrial accelerometers have low noise at low frequencies. For virtually all industrial accelerometers, noise is very rarely an important consideration at frequencies above 1,000 Hz.

The Daviteq's wireless vibration sensors are built from the high-quality low noise accelerometer sensor, down to 25 μg/√Hz, allowing the sensor can detect very small vibrations. Therefore it delivers the high accuracy output in a wide bandwidth from DC to 10 KHz.

Please find below our product information of the Wireless vibration sensors:

• Sub-GHz Wireless Vibration Sensor: https://www.daviteq.com/en/?prd=_WS433-V1A_wireless-piezo-electric-10khz-vibration-sensor 
• LoRaWAN Vibration Sensor: https://www.daviteq.com/en/?prd=_WSLRW-V1A_lorawan-piezo-electric-10khz-vibration-sensor 
• Sigfox-Ready Vibration Sensor: https://www.daviteq.com/en/?prd=_WSSFC-V1A_sigfox-piezo-electric-10khz-vibration-sensor 

Please feel free to contact us if you need further information.