6.HR Barometric Sensor


Nke’s Baro HR 100 sensor is a measuring instrument that provides instant atmospheric pressure as well as the pressure variation over the previous 10 hours. It can be connected to the nke TOPLINE bus of your installation, or, thanks to its NMEA 0183 output, to any NMEA receiver that processes MMB, MTA and XDR frames. Compact and accurate (0.5 mbar), this instrument will become essential to prepare your weather forecasts. In addition, the Baro HR 100 is fitted with a meter for engine hours, thus allowing to have an account of the hours of use of your engine. The sensor is supplied with a 6m TOPLINE bus cable.

Every second, the BARO HR 100 transmits the atmospheric pressure and air temperature to its NMEA output (yellow wire). Note that is is possible to independently use the NMEA 0183 output and the Topline bus link. However, the data transmitted over the NMEA link take into account the existing settings in the Topline sub-channels (Offset and filtering). The atmospheric pressure is transmitted in the XDR and MMB frames while the air temperature is transmitted in the XDR and MTA frames. Example of NMEA transmission:

  • $IIXDR,P,1.02481,B,Barometer*0D
  • $IIXDR,C,19.52,C,TempAir*3D
  • $IIMTA,19.52,C*1E


  • Power supply: 10 to 16VDC
  • Power consumption: 25mA
  • Tightness: IP54
  • Weight: 270 g (with 5m of cable)
  • Operating temperature: -10°C to +50°C
  • Storage temperature: -20°C to +60°C

Pressure characteristics

  • Measurement range: 800 to 1100 mbar
  • Resolution: 0.01 mbar
  • Relative accuracy: +/-0.5 mbar at 25°C from 800 to 1100 mbar
  • Absolute accuracy: +/-1.5 mbar at 25°C from 800 to 1100 mbar

Temperature characteristics

  • Measurement range: -10°C to +50°C
  • Resolution: 0.01°C
  • Accuracy: +/-0.8°C at 20°C