Level Measurement of Open CIP Chemical Tank

Introduction

• At food, beverage and pharmaceutical production lines, tanks and pipes are cleaned and sterilized every time when production is completed.
• An open tank (Height: 2 to 4 m), open to atmosphere, is used as a chemical tank containing CIP cleaning solution. (CIP: “Clean-in-Place”).
• Tank level is measured by pressure, but it is sometimes unstable to measure due to small gauge pressure from the tank with sanitary fittings.

Requirements

• Pressure sensor with suitable measuring range for low pressure measurements. Among the pressure sensors with fill fluid liquid, there are limited options.
• A pressure sensor without fill fluid can withstand steam and high water pressure with rapidly changing temperature, up to 150 deg C, during cleaning process.
• Reliable and accurate performance under harsh process conditions with high noise levels.

Proposal

Precise measurement of liquid level can be expected with EJAC60E,YOKOGAWA’s Fluidless-type Sanitary Pressure Transmitter, that performs reliably and accurately from minimum 20 kPa on small open tanks.

Features of EJAC60E (= EJA560E + C10SA adapter)

• Fluidless transmitter has no risk of process contamination with fill fluid.
• The sensor has a robust diaphragm design for 25 MPa (3600 psi) burst pressure.
• Transmitter performs steady even for small pressure range (example : 20 kPa, 2.9 psi).
• Sensor is suitable for high temperature steam cleaning and continuous process temperature up to 150degC (302degF).

Other details of Fluidless EJAC60E

• Resistant to excessive pressure
  • The wetted sensor part is a reinforced type SUS 329 J 14 L.
  • Metal diaphragm prevents brittle fracture
• Resistant to condensation
  • High moisture resistance with special moisture-proof film + coating
  • Outperforms other manufacturers more than 20 times in dew condensation tests
• Steam resistant
  • Sensor is formed by sputtering method, resulting in no aging deterioration of the joint.
  • Electrode is fused with metal to achieve the durability for 200,000 steam cycles.