pH Sensor for High Purity Water PH8EHP

Yokogawa's process pH Analyzers are highly reliable and feature advanced functions which are useful for a wide variety of applications including water quality management in a broad range of production processes and in medium-sized wastewater treatment plants, or as general purpose pH control systems.

Based on Yokogawa's track record and years of experience, a comprehensive range of products has been produced to provide solutions best suited to individual applications.

The PH8EHP pH sensor and PH8HH holder perform reliable measurement of pH for high purity water used in boilers and semiconductor process applications.

  • The dedicated holder provides solutions to problems that arise when measuring high-purity water.
  • Combined with the PH450G and PH202 pH/ORP analyzers, it compensates for the effect of fluid temperature.

1. pH sensor PH8EHP for High Purity Water

Measuring temperature 0 to 50℃
Measuring pressure Atmospheric pressure
Temperature compensation sensor Pt1000
Weight Approx. 0.4 kg

2. Holder PH8HH for High Purity Water

Material Acrylic resin, 316SS, chloroprene rubber
Process connections Inlet; Rc1/4 or 1/4NPT (F)
Outlet; Rc1/2 or 1/2NPT (F)
Mounting method 50A (2-inch) vertical or horizontal pipe mounting or wall mounting (Specify mounting bracket)
Weight Approx. 1.7 kg

Reverse osmosis (RO) is a separation process that uses pressure to force a solution through a membrane that retains the solute on one side and allows the pure solvent to pass to the other side. More formally, it is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure.


The lifetime of a pH sensor has a significant impact on the overall annual costs of a pH measuring loop. Optimizing four key factors will decrease these costs and optimize process control and overall plant efficiency.

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