Solving the problem of concentration control of chemicals in all industries from the history of more than 70 years Solving the problem of concentration control of chemicals in all industries from the history of more than 70 years

Product introduction movie

Characteristics of chemical concentration measurement and control equipment

In dyeing, we use various chemicals and dyes. Since variations in the processing process lead to variations in quality, we have been working to stabilize quality by developing our own chemical concentration control device for a long time. Tokai Senko's concentration control device not only reduces quality variations, but also leads to environmental consideration and cost reduction in the sense that it does not use excess chemicals. "The automatic concentration control device" for chemicals can be applied not only to dyeing manufacturers in the same industry, but also to any manufacturing industry that requires concentration control.

It can meet all needs such as the type of chemical solution and the range of adjustment, and is used not only in the dyeing industry but also in a wide range of industries. Tokai Senko's concentration control devices are highly evaluated not only in Japan but also overseas. We propose various concentration control systems that suit the customer's manufacturing process, and have received the support of our customers through not only maintenance after sales but also proposals for higher quality processing.

Improved quality control

Improved quality control

The concentration of the chemical solution is continuously measured and the concentration is controlled. Quality control can be expected to improve by introducing a concentration control device.
Cost reduction

Cost reduction

Concentration control devices not only reduce quality variations, but also reduce costs in the sense that excessive chemicals are not used.


It solves the problems of pollution and pollution by reducing the environmental load without using excessive chemicals. It is a technology that is friendly to the global environment.

Example of measurement chemicals

  • Hydrochloric acid (HCl)
  • Sulfuric acid (H2SO4
  • Formic acid (HCOOH)
  • Boric acid(H3BO3
  • Sodium hydroxide(NaOH)
  • Sodium carbonate (Na2CO3
  • Sodium chlorite(NaClO2
  • Hydrogen peroxide (H2O2
  • Iodine(I2
  • Sodium thiosulfate (Na2S2O3
  • Ammonium chloride(NH4Cl)
  • Sodium dithionite (Na2S2O4
  • Nitric acid (HNO3
  • Acetic acid(CH3COOH)
  • Citric acid (C3H4(OH)(COOH)3
  • Tartaric acid([CH(OH)COOH]2
  • Potassium hydroxide (KOH)
  • Aqueous ammonia (NH3(aq))
  • Sodium hypochlorite (NaClO)
  • Potassium permanganate(KMnO4
  • Potassium iodide(KI)
  • Sodium bisulfite (NaHSO3
  • Formaldehyde (HCHO)

Other chemicals can also be measured. We will propose the optimum system for each chemical and processing process. We will respond to any request and provide custom-made equipment, so please contact us once.

Product introduction

We will listen to your request and the process you want to realize, and by combining the products, we will provide the system that suits your purpose.

Dyeing process for textile

Dyeing process

  • ●Desizing scouring process
  • ●Bleaching process
  • ●Mercerizing process
  • ●Neutralization process
Polarizing film manufacturing process

Polarizing film manufacturing process

  • ●Dyeing process
  • ●Saponification process

Iodine manufacturing process

Iodine manufacturing

  • ●Iodine concentration
     measured in brine

Process continuous automatic measuring device

Process continuous automatic measuring device

  • ●Concentration measurement by titration in each manufacturing process
Process continuous titrator

Process continuous

  • ●Measurement by Tokai Senko's
     original continuous titration
  • Introduction flow

    STEP1 Interview

    STEP1 Interview

    ・Target chemical ・Contents of the chemical ・Elution ・Process flow
    ・Concentration change behavior ・Required accuracy etc
    STEP2 Measurement test

    STEP2 Measurement test

    ・Sensor selection ・Measurement with a lab machine ・Influence of other chemicals and eluents etc.
    STEP3 Prototype / Improvement

    STEP3 Prototype / Improvement

    ・Measurement with actual solution ・Long running test ・Effect of dirt etc.
    STEP4 Design, production, delivery

    STEP4 Design, production, delivery

    ・Electrical specifications ・Installation space   etc.
    STEP5  Commissioning

    STEP5 Commissioning

    ・Installation by user ・Operation preparation etc.

    For the dyeing industry

    Are you struggling with these problems?

    ●Since we manually control the concentration of chemicals, we are considering introducing a concentration control system.
    ●We want to reduce costs and environmental impact by reducing the amount of chemicals used.
    ●We are considering updating the system as the equipment is aging.
    Tokai Senko holds the top class share in the Japanese dyeing industry in the chemical concentration control system. We will contribute to your business with stable operation and maintenance system.

    Advantages of introduction

    ●We contribute to stable quality and reduction of labor costs by automating the concentration control of chemicals.
    ●We protect your business with a secure maintenance system.
    ●We will improve production efficiency with the know-how and achievements that have the largest share in the Japanese dyeing industry.
    ●We reduce chemical usage by an average of 10-30%. (The reduction rate varies depending on each factory.)
    ●By introducing a concentration control device, customers can control the concentration of chemicals without stopping the production line.