Tediasens SN-I

Wireless data acquisition

Sensor for wireless data acquisition of vibrations and accelerations

The TEDIASENS SN-I radio node is particularly suitable for wireless vibration measurement, vibration analysis and machine condition monitoring. Here, the radio node impresses with its small size and the integrated sensor for vibration measurement.

Wireless vibration measurement with Tediasens SN-I radio node

Due to an internal industrial 3D accelerometer many measurement tasks in the field of vibration analysis can be solved without major installation costs and by avoiding cables. The radio node can be mounted easily and quickly almost anywhere. Either the radio node is attached with screws or magnetic mount  to the measurement site.

The industrial accelerometers have a measurement range of ± 10 g and ± 100 g and an accuracy of 1 mg (peak-peak) over the range of 0.32 Hz to 10 kHz (-3dB). The sampling of the signals occurs with a dynamic range of 24 bits and a maximum frequency of 13 kHz.

Wireless data transmission to an evaluation unit

This sensor transmits the measured data with a data rate of 1 Mbit/s to a WLAN access point, which  is connected to an evaluation unit for the data analysis.

Vibration measurement

Vibration measurement is a powerful tool to assess the condition of rotating machinery. For vibration measurement, there are two basic methods: continuous monitoring systems and mobile data acquisition devices. The TEDIASENS SN-I radio node is suitable for both methods of vibration measurement. Thus, the SN-I sensor node may be attached firmly to a machine to perform a vibration measurement or the portable, battery-powered accelerometer is used for mobile vibration measurements on different machines.

Application areas of the sensor

  • synchronous data acquisition in a sensor network
  • especially for vibration measurement of machinery, buildings, bridges and many more

Focus advantages of the sensor

  • integrated industrial accelerometer
  • up to 40 sensors in a sensor network are evaluable
  • extremely simple and fast synchronous data transmission
  • low weight of only 270 g and small dimensions
  • works with battery and with a power cable
  • very good wireless range (802.11g – 138 m)

Technical data

Number of channels
per sensor node
3D acceleration sensor
Range ±10 g / ±100 g
Bandwidth 0.32 Hz to 10 kHz (-3dB)
Accuracy 1 mg (peak-peak, broadband)
A/D converter resolution 24bit
Sampling rate max. 13 kHz software selectable
Signal-to-noise ratio (SNR)* 109,5dB RMS broadband
Channel sampling simultaneous
Synchrony 1 µs standard deviation
Data rate per sensor node 1,0 MBit/s
Sensor nodes per system 1 up to 40 (typically 10)
Range 802.11g free field 138 m isotropic
Measuring time typ. 7-9 h with accumulator
Charging time max. 3 h
Control 1 user key and software controlable
Display 4 LEDs (WLAN- or accumulator condition)
Dimensions 40 x 40 x 82 mm³ (without antenna)
Weight ca. 220 g (incl. accumulator and antenna)

*SNR (signal-to-noice ratio) compares the level of a signal to the level of background noise and is defined as the ratio of signal power to the noise power.

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