PH8EFP、PH8ERP、OR8EFG、OR8ERG pH/ORP传感器

横河电机的pH/ORP分析仪可靠性很高,具有多种先进功能且应用广泛,包括在一系列生产过程和中型废水处理厂中进行水质管理,或者用作通用的pH/ORP控制系统。

基于横河电机的优秀业绩和多年的经验,我们的产品种类丰富,可提供适合各种应用的解决方案。

除了PH8EFP、PH8ERP、OR8EFG和OR8ERG标准Ryton pH/ORP传感器,专业pH/ORP传感器还适用于多种应用场合。

虽然pH/ORP传感器之前被用作模拟检测器,但是通过安装SA11 SENCOM智能适配器,还可用作数字检测器(带Variopin接头)。pH/ORP传感器是一款适用于现场和各种组合应用的pH检测器。

PH8EFP、PH8ERP、OR8EFG、OR8ERG Ryton pH/ORP传感器

  • 该传感器的本体由Ryton材料制成。Ryton是一种坚固的工程塑料,在耐腐蚀和耐热性方面可与Teflon材料相媲美,可用于多种应用场合。
  • 无论是否使用支架或清洁器,使用一种电极即可用于所有应用场合。
  • 集成电极设计可通过标准解决方案和维护简化标定过程。
  • pH分析仪的玻璃电极、铂或金电极和ORP分析仪的接合点均可轻松更换。
  • 通过将pH/ORP传感器与SA 11 SENCOM智能适配器组合,可用作数字检测器。横河电机的更高型号可提供开放式环境。
    * 有关详细信息,请参阅“SA11 SENCOM智能适配器”

1. pH传感器
1-1. PH8ERP KCl可再填充型电极

测量对象 水溶液中的氢离子浓度(pH)
测量原理 玻璃电极法
测量范围 pH 2~12
测量温度 -5~80℃
测量压力 大气压~50 kPa
温度补偿传感器      Pt1000
重量 约0.4 kg
数字通信功能 支持SENCOM4.0
(连接Variopin接头和SA11适配器)  


1-2.PH8ERP KCl填充型电极

测量对象 水溶液中的氢离子浓度(pH)
测量原理 玻璃电极法
测量范围 pH 0~14
测量温度 -5~105℃
测量压力 大气压~10 kPa (通用型或大容量储罐500 ml)       
大气压~500 kPa (中压)
温度补偿传感器      Pt1000
重量      约0.4 kg
数字通信功能     支持SENCOM4.0
(连接Variopin接头和SA11适配器)


2. ORP传感器
2-1. OR8ERG KCl可再填充型电极

测量对象          水溶液中的氧化还原电位        
测量原理 金属电极法
测量范围 -1500~1500 mV
测量温度 -5~80℃
测量压力 大气压~50 kPa
重量 约0.4 kg


2-2. OR8EFG KCl填充型电极

测量对象          水溶液中的氧化还原电位
测量原理 金属电极法
测量范围 -1500~1500 mV
测量温度 -5~105℃
测量压力 大气压~10 kPa (通用型或大容量储罐500 ml)
大气压~500 kPa (中压)
重量 约0.4 kg
概述:

Introduction

Pigment producer manufacture produces pigments to supply to paints, plastics, inks, construction, textile and cosmetics manufacturers etc. The pigments come under wide range - general purpose grades, high performance, and specialist hard-to make colours and effect pigments.

Pigments and chemicals form an intrinsic part of many industries. They serve as raw materials in the manufacturing of Plastic, Rubber, Paint, Paper, Textile, Tiles, Detergent Powder and Soaps, Inks, and Photo Films etc.

Pigments come in a wide variety of colours and some are water-soluble. For these reasons, many of these compounds have been produced, isolated, and characterized.

Among the most important variables affecting processes, pH and temperature are environmental conditions with a strong effect on the pigments. Thus, it is very important to control them in industrial bioprocesses.

Balancing the pH

The degree of acidity or alkalinity of a solution, known as pH, is measured from 0 to 14. Acid solutions measure 0 to 7. Alkaline (smells like ammonia) solutions measure 7 to 14. Pure distilled water measures 7. There are instruments to measure pH, or you can rely on sense of smell. The binder should have a slight ammonia odor. We are shooting for a pH range of 8.0 to 8.8. The acrylic polymer used to make paint becomes unstable at a pH below 7.5. Adding a dispersion may lower the pH below the optimum range. Also, adding thickeners will typically lower the pH. If polymer binder starts looking and acting like cottage cheese then chances are pH is too low. Try raising the pH to salvage the batch. Do this with the drop-wise addition of Ammonium Hydroxide (NH4OH) while mixing. If the mixture does not respond to the pH correction, allow it to dry out for disposal.

Controlling Viscosity and Rheology

Thickness or viscosity is generally well understood. Rheology usually bears a bit of explanation. Long rheology refers to a stringy, resinous, quality, like that of honey. Industrial enamels and automotive paints often exemplify these qualities. Short rheology refers to a smoother, less "ropy" paint formulation, typical of what acrylics and oil paints are known to be. To create different rheologies, you can choose the appropriate gel or medium to combine with the dispersion. These are pH sensitive polymers that swell up when the paint's pH is 8.0 - 9.5 (It is critical to keep the paint in this range.)

Ammonia is used to maintain the pH in the acceptable range. Ideally, this is determined with a pH meter, and is characterized by a slight ammonia odor. You will feel the mixture get thicker as you proceed. (If you are getting chunks it may be a result of adding the Thickeners too quickly or insufficient mixing.) Blend until the mixture is smooth and of the desired thickness.

Typical Process details as an example:

Typical problems 

  1. What is the concentration of these chemicals?
    • Customer may say it is difficult to give concentration of these chemicals.
  2. What is the process pressure?
    • Process pressure: atmospheric pressure
  3. Calibration frequency
    • Once in a day. Customer has observed drift of @1 PH every day i.e. why calibration is done daily.
  4. Scaling?
    • Yes scaling shall be observed on electrode
  5. CIP/SIP
    • No.
  6. Typical sensor life @1 1/2 months to max. 2 months
  7. Process temp.
    • varies from -5 to +105 deg C, typical batch process temp. will be 95 degC (changes from manufacturer to manufacturer)

Remedies

  • Use sensor with most chemically resistant Ryton body.

Product Recommendation

Measurement System

Process Liquid Analyzer: 

2-wire FLEXA pH/ORP Analyzer

Features

  • Dual sensor measurement on 2-wire type analyser
  • Indication of sensor wellness

 

  • 4-wire PH450G pH/ORP Analyzer

Features

  • Easy touchscreen operation
  • Trending display up to 2 weeks
  • Advanced Process Temperature Compensation

Sensor Selection:

pH immersion fitting like PH8HS / equivalent with PH8EFP sensor.

Features

  • With the body made of Ryton, a strong engineering plastic, which is comparable to Teflon in terms of corrosion resistance and heat resistance, it allows for a wide range of applications.
  • The integrated-sensor design simplifies calibration with standard solutions and maintenance.
  • The pH glass electrode of a pH sensor, the platinum or gold electrode of a ORP sensor and junction can be individually replaced.

Tangible benefit

More reliable and accurate analysis of pH which helps to improve end product quality and total operation cost is less.

Note: For additional information on this application contact the local Yokogawa Process Liquid Analyzer Department

行业:
概述:

Cyanide-bearing wastewater from mining and electroplating facilities and certain types of chemical plants is toxic and must be treated by oxidation with chlorine or chloride to bring the cyanide concentration within regulatory limits.

Industry:Electrical and Electronics

概述:

In flue gas desulfurization systems that use magnesium hydroxide (Mg(OH)2) slurry, the consumption of the desulfurization agent (Mg(OH)2) is controlled by using online pH analyzers. A great concern in the pH measurement is heavy staining of the pH electrodes by the Mg(OH)2 slurry. To ensure accurate measurement, frequent cleaning of the electrodes with an acid is required, adding to both maintenance workload and cost.

Industry:Chemical, Power

概述:

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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