Fischer NB10 – well probe for hydrostatic liquid level monitoring

Fischer NB10 is well probe from liquid level monitoring of water or liquid containers and bodies including dams, tanks etc. It has long term measuring stability with high accuracy and corrosion-resistance.

NB10 uses principle of hydrostatic pressure measurement principle, and thus can monitoring two 250 meter depth.


Fischer NB10 – Liquid Level transmitter / well probe with hydrostatic monitoring

pdf-imageFischer NB10 – Rugged, long term stable, corrosion-resistant, well probe, level transmitter by hydrostatic pressure measurement
Make: Fischer Messtechnik (Germany)
Model: NB10


Fischer NB10 is compact, rugged measuring probe for liquid level monitoring. It is based on hydrostatic pressure measurement of fluid or liquid level.

Fischer NB10 - liquid level transmitter well probe for monitoring hydrostatic pressure
Fischer NB10 – liquid level transmitter well probe for monitoring hydrostatic pressure

Working Principle:

Fischer NB10 well probe is based on highly sensitive pressure sensor with silicon membrane measuring element.

A DMS resistance bridge is attached to the rear of this silicon membrane using thin-film method. The well probe NB10 is equipped with an indirect hydraulic pressure sensor which guarantee system-inherent dead space latitude. An elastic membrane isolate the pressure sensor from the medium to be measured.

Transfer fluid is filled between membrane and pressure sensor. Thus, when pressure is applied, transfer fluid transfer pressure to deforms silicon membrane.. As a result, resistance of the resistance bridge changes linear proportional to the measuring pressure. Thus, electronic module converts changes in resistance to standard electrical signals.


Key Features:

  • High accuracy
  • Low hysteresis
  • Corrosion-resistant material
  • Integrated measurement convertor
  • Long term stability

Key Specifications:

  • Measuring range: 0 ~ 1 meter to 0 ~ 250 meter cable length
  • Overpressure safety: threefold
  • Linearity: ± 0.5% of measuring range
  • Hysteresis: ± 0.1% of measuring range
  • Operating ambient & media temperature: -10° C ~ +70° C
  • Electrical connection: PUR insulated, screened connecting cable with internal vent hose
  • Protection class: IP68 per DIN 40050
  • Material in contact with media: CrNi Steel 1.4435
  • Power supply: 24 V DC
  • Output signal: (0) 4 – 20mA, 2 or 3-wire
  • Temperature drift zero point: 0.6 % full scale / 10K
  • Temperature drift measuring range: 0.2 % full scale / 10K


Application areas:

  • Well, pond
  • Dams, water bodies
  • Waste water system, effluent treatment facility
  • Tanks, containers

Industrial areas:

  • Process engineering
  • Environment engineering
  • Renewable energy eg. biogas etc
  • Waste Water Engineering
  • Effluent treatment
  • Breweries, alcohol industry