Relative permittivity-correcting
Level transmitter






Intrinsically safe construction(i3nG5)


Fluids in which the relative permittivity tends to be unstable.


The relative permittivity-correcting level transmitter has been developed to determine an accurate level for fluid level measurement applications in which the relative permittivity tends to be unstable due to changes in components or mixture ratios.

Relative permittivity-correcting Level transmitter

During the measurement of the level of a fluid of unstable relative permittivity during the process of concentrating a two-component mixture fluid or a single-component fluid, a continuous change occurs in the relative permittivity at each stage of the process. To obtain a net level signal, a corrective calculation is performed on the signal of the level transmitter using a relative permittivity signal. For this purpose, a short detector (compensating probe) of a relative permittivity transmitter is installed at a location deeper than the detector of the level transmitter.

Signal of level transmitter CL=(ε-1)Cℓ
Signal of relative-permittivity meter Cε=(ε-1)C

ε:Relative permittivity of liquid (variable)
C: Electrostatic capacitance of probe per unit length (invariable)
ℓ: Net level signal


Measurement system Capacitance system
Measurement range Min. range 0~5mm , Max. range 0~10m (Any other range are possible)
Output signal DC4~20mA DC1~5V ※ One of the above signal
Input power Model QBS-DC (Model PS-0IF): AC105V/210V 50/60Hz or DC24V
Model NSB-DC(Model PS-2):   AC105V/210V 50/60Hz
Power consumption 20W
Allowable temperature Detector: -200℃~+1100℃ (Depends on the specifications)
Transducer:  Model PS-0DC: -10℃~+50℃
Transducer:  Model TR-2DC: -25℃~+70℃
Power source: Model PS-2:   -10℃~+50℃
Special cable:  Model DSC-15 (high accuracy use):   -10℃~+60℃
Special cable:  Model DSC-05 (small size):      -10℃~+60℃
Special cable:  Model DSC-13 (heat resistance use): -50℃~+200℃
Allowable pressure Detector: 100MPa (approx. 1020kg/cm2G)
      (Depends on the specifications)
Weight Transducer:  Model PS-0DC: 5.5kg
Transducer:  Model TR-2DC: 4.3kg
Power source: Model PS-2:   7.6kg
Size Transducer:  Model PS-0DC: 216(W)×125(D)×259(H)
Transducer:  Model TR-2DC: 200(W)×149(D)×220(H)
Power source: Model PS-2:   250(W)×145(D)×275(H) (mm)
Installation Detector: Flange mounting Screws mounting IDF Grayloc connector
      Ferrule Ring joint Lens Aminco Non-standard flange, etc.
Material Detector: SUS304 SUS316 SUS316L Hastelloy Titanium
      Tantalum Nickel  PTFE Ceramic, etc.
Lining: PTFE Glass Rubber, etc.
Head case: Light alloy SUS304 Salt resistant paint case, etc.

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