Electromechanical lot system

NivoBob® – NB 3400

Application area

The NivoBob® NB 3400 electromechanical plumb bob sensor is used for continuous level measurement of separating layers in various tanks and settling basins. It can be used for applications with solids in liquids and does not need to be calibrated. In practice, the simple electromechanical measuring principle makes the NB 3400 the optimal sensor for these applications. 

Technical Data

Measurement principleElectromechanical Lot-Sensor
Measuring task
  • Continuous level measurement
  • Interface level measurement
VersionTape version
MediumSolids
Mounting position
  • top
  • on a Socket
Ambient temperature-40°C … +60°C (-40°F … +140°F)
Process temperature-40°C … +80°C (-40°F … +176°F)
Process pressure-0,5 bar … +1,7 bar (-7.3 psi … +25 psi)
Minimum sensitivity> 300 g/l (> 18 lbs/ft3)
Housing typedual chamber
Housing materialAluminium
Housing protection ratingIP66, Type 4
Threaded connection
Flange connection
  • ≥ DN100
  • ≥ 4″
Hygienic fittings
Wetted materials
  • Aluminium
  • Stainless steel 1.4305 (303)
  • Stainless steel 1.4301 (304)
  • Stainless steel 1.4310 (301)
  • PVC
Mechanical load
  • standard motor: 0,8 kN
  • brushless motor: 3 kN
Accuracy0.5% of max. range
Min. immersion length615 mm (24.24″)
Max. immersion length1,66 m (5.54′)
Power supply
  • 98…253V AC
  • 20…28V DC
Signal output
  • 0/4…20 mA
  • Relay
  • Modbus RTU
  • Profibus DP
Approvals
  • CE
  • General purpose
  • ATEX
  • TR-CU
  • FM
Explosion protectionDust Ignitionproof (Ex t)
Hygienic / Pharma
Ship approval
Overfill protection
SIL qualification
Further approvals
User InterfaceLCD Display with push buttons
Optical indicatorLED + Display
Adjustment possibility
  • adjutable sensitivity
  • self diagnostics
  • menu-driven quick start
  • volume table