The FU20 and FU24 all-in-one sensors show how Yokogawa applies the motto "Simple is best" to sensor technology. These sensors feature four separate elements (pH, reference, temperature, ORP) allowing for simultaneous measurement of pH and ORP is possible with one sensor in a rugged Ryton or PVDF (FU20) and Ryton (FU24). The integral or variopin cable comes number-coded cable along with the integral NPT threads on the sensor makes installation convenient. The Quick Release Adapters for the FU20 allow easy removal of the sensor for cleaning and calibration.
Which sensor is right for you?
There are now SIX different wide-body sensor designs available to choose from.
Please use the charts below to help guide you in the proper selection of which version is best for your application.
Details
- Available as analog and digital SMART sensors (SENCOM)
- Solid Platinum ORP/LE electrode for accurate simultaneous pH and ORP measurements.
- Integral Pt1000 element for accurate temperature measurements and enhanced pH accuracy
- Double junction and long diffusional path for reference pollution/poisoning resistance
- Saturated Ag/AgCl reference system with double junction combined with polymerized saturated KCl and ion-trap prolong the life of the reference probe even in chemically unfavorable environments.
- Extended life time by large volume of polymerized electrolyte and porous PTFE diaphragm
- Cation Differential reference system available in the FU20 for elongated life
- Variopin connector or integrated cable options
- Simple maintenance by comprehensive design
- Versatile Direct in-line, immersion, off-line installation (flow fitting) and retractable Hot-tap (available with use of the FU20 only)
- Quick-Release adapter available for the FU20
- Calibration certificate delivered with each sensor
- Patented automatic pressure compensation in the FU24
- Available in two versions, a robust dome shape model for applications with a limited amount of solids, and a flat surface model for applications in which solids are a considerable component
The FU20 combination sensor shows how Yokogawa applies the motto "Simply the best" to sensor technology. The wide body sensors (26 mm diameter) hold four separate elements in one unbreakable PPS40GF (RytonTM) or PVDF body. Installation is simple with the integrated industrial 3/4" tapered thread. The large volume gelled electrolyte and the double junction reference system slows down depletion and poisoning therefore extending the lifetime. The system is targeted at those applications where simplicity will result in accurate and reliable pH- or redox measurements. This means that in 90% of the know applications this sensor will be an excellent choice.
The FU24 is an all-on-one pH and ORP sensor made with a chemical resistant PPS 40GF body for harsh pH applications. It is particularly useful in applications with fluctuating pressure and/or temperature. These processes shorten sensor life because the process fluids move in and out of the sensor under influence of frequent pressure and/or temperature fluctuations. This results in fast desalting and dilution of the reference electrolyte which in turn changes the reference voltage causing a drifting pH measurement.
By integrating the successful Yokogawa patented Bellow design concept within the FU24 electrode, a strong pressure compensation mechanism is created. The built-in bellow ensures immediate interior pressure equalization to the outside pressure, making the sensor virtually insensitive to external pressure variations. A slight overpressure caused by the bellow tension, prevents fluid ingress and maintains a positive ion flow out of the sensor.
Resources
Yokogawa & Nouryon Co-Innovation Leads to New pH-Analyzer
There are many points in the processing of edible fats and oils that benefit from the use of analytical measurements. Inductive conductivity, contacting conductivity, gas density, and pH can be utilized to increase the quality of the end product, as well as protecting expensive processes.
Where and why are the pH Measurements important in a brewery? No one wants a skunky beer. pH measurements in the wort, during mashing/souring the malt, and in the yeast enzymes are critical.
Wet scrubbers are used in utilities, paper mills, and chemical plants to remove sulfur dioxide (SO2) and other pollutants from gas streams. Undesirable pollutants are removed by contacting the gases with an aqueous solution or slurry containing a sorbent. The most common sorbents are lime, Ca(OH)2, and limestone, CaCO3.
Dairy wastewater is a mixture of organic compounds, suspended solids, fats, and bacteria that can produce a film or coating on equipment in the process.
For control of batch neutralization, a pH measurement coupled with a timer-controlled chemical feed scheme provides very satisfactory results.
This system can be adapted for either acid waste or alkaline waste neutralization.
Maximize steel plant efficiency with comprehensive waste treatment solutions. From coal washer to blast furnace waste, optimize processes for quality.
Having too much oxygen in the process is not a problem for the biological system; however the cost for generating the oxygen is one of the largest expenses. By obtaining a good representative average of the dissolved oxygen present in the basin could save the plant large amounts of money. For this reason multiple measurements points are sometimes put into place.
After extraction from sugar cane or sugar beets, the juice must be purified to remove the many other organics and minerals that accompany it. The processing to accomplish this is heavily dependent on reliable pH measurement and control as illustrated.
Process liquid analyzers such as pH meters, conductivity meters, ORP meters, and density meters play an important role at electrolysis plants in the control of concentrations of various process solutions. This requires both precision and stability under harsh conditions that include highly corrosive substances, high temperatures, and many impurities.
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
Wastewater from electroplating facilities and certain types of chemical plants contains toxic forms of hexavalent chromium such as chromate and dichromate. The hexavalent chromium in this wastewater must be reduced before the water can be discharged. This requires a two-step process: hexavalent chromium (CR6) is reduced to trivalent chromium (CR3); and CR3 is precipitated as chromium hydroxide.
Industry:Electrical and Electronics
Removal of free oil and grease from a wastewater stream reduces the potential for equipment problems downstream. Three forms of oil are encountered in wastewater treatment at a refinery: Free Oil, Emulsified Oil, Dissolved Oil.
Power plant boiler houses designed to burn coal or high sulfur oil are required by Federal and State pollution regulations to "scrub" (remove) sulfur dioxide from flue gasses to meet emission limits. SO2 in flue gasses is known to be harmful to the environment, as it is one contributor to the formation of acid rain. pH control is critical for the proper functioning of the scrubber system.
The treatment of wastewater from pulp and paper plants is a serious environmental concern. Yokogawa's submersion holder with an ultrasonic+air-jet cleaner (customized product) can reduce the manual cleaning frequency to just once every one or two months.
Fish are totally dependent upon water to breathe, feed, grow, maintain a salt balance, and reproduce. Water quality determines the success or failure of an aquaculture operation.
Many Ethanol plants running today are using a combination style pH electrode with a non-flowing reference to measure pH in the Mash Slurry transfer line from the Mash slurry mix tank to cook. The Mash is being pumped out of the Mash Slurry tank is at approximately 180 °F and 40 to 60 psig.
Optimizing four key factors will decrease pH sensor costs and optimize process control and overall plant efficiency.
Current trend for increasing mercury awareness throughout the public sector has caused the government to take action. Recently, the Environmental Protection Agency (EPA) has focused their efforts on controlling mercury levels produced in various coal fired power plants. Based on information from several case studies, the EPA developed the Mercury and Air Toxics Standards to cut back mercury emissions. The most popular technology utilized by coal plants to meet the new standards is a scrubber which cleans the off gas from the combustion process. ORP sensors can further monitor the effluent from these scrubbers to ensure optimal mercury emission levels are achieved. By closely monitoring the mercury concentrations in the effluent, plant managers will be able to easily confirm their plants are meeting the EPA's standards.
Select the correct pH glass and reference type to improve your pH sensor lifetime and you can limit or even eliminate the effects of temperature and pressure on especially the reference sensor.
- Ammonia
- Base Chemical
- Biomass Power
- Chemical
- Chlor-Alkali
- Cogeneration
- Combined Cycle
- Desalination
- Drinking Water Treatment
- Energy Transition
- Food & Beverage
- Geothermal Power
- Hydro Power
- Industrial Water
- Iron & Steel
- LNG Liquefaction
- LNG Regasification & Storage
- LNG Supply Chain
- Methanol
- Mining & Metal
- Nuclear
- Ocean Thermal Energy Conversion
- Oil & Gas Downstream
- Petrochemical
- Power
- Processing & Fractionation
- Pulp & Paper
- Refining
- Specialty & Fine Chemical
- Water & Wastewater
Learning these four lessons will help you improve your engineering skills and most importantly extend the life of your pH sensors.
- Ammonia
- Base Chemical
- Biomass Power
- Chemical
- Chlor-Alkali
- Cogeneration
- Combined Cycle
- Desalination
- Drinking Water Treatment
- Energy Transition
- Food & Beverage
- Geothermal Power
- Hydro Power
- Industrial Water
- Iron & Steel
- LNG Liquefaction
- LNG Regasification & Storage
- LNG Supply Chain
- Methanol
- Mining & Metal
- Nuclear
- Ocean Thermal Energy Conversion
- Oil & Gas Downstream
- Petrochemical
- Pharmaceutical
- Power
- Processing & Fractionation
- Pulp & Paper
- Refining
- Specialty & Fine Chemical
- Water & Wastewater
Optimizing the maintenance cycle is not always straightforward. In some cases, cleaning once a week is sufficient and other processes may require every 8 hours.
- Ammonia
- Base Chemical
- Biomass Power
- Chemical
- Chlor-Alkali
- Cogeneration
- Desalination
- Drinking Water Treatment
- Energy Transition
- Food & Beverage
- Geothermal Power
- Hydro Power
- Industrial Water
- Iron & Steel
- LNG Liquefaction
- LNG Regasification & Storage
- LNG Supply Chain
- Methanol
- Mining & Metal
- Nuclear
- Ocean Thermal Energy Conversion
- Oil & Gas Downstream
- Petrochemical
- Pharmaceutical
- Power
- Processing & Fractionation
- Pulp & Paper
- Refining
- Specialty & Fine Chemical
- Water & Wastewater
Kind of. Calibration itself will not extend the life of a sensor, however, a sensor that is not calibrated properly can cause unreliable measurements - that are often misdiagnosed leading to unnecessary replacements.
- Ammonia
- Base Chemical
- Biomass Power
- Chemical
- Chlor-Alkali
- Cogeneration
- Combined Cycle
- Desalination
- Drinking Water Treatment
- Energy Transition
- Food & Beverage
- Geothermal Power
- Hydro Power
- Industrial Water
- Iron & Steel
- LNG Liquefaction
- LNG Regasification & Storage
- LNG Supply Chain
- Methanol
- Mining & Metal
- Nuclear
- Ocean Thermal Energy Conversion
- Oil & Gas Downstream
- Petrochemical
- Pharmaceutical
- Power
- Processing & Fractionation
- Pulp & Paper
- Refining
- Specialty & Fine Chemical
- Water & Wastewater
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.
- Ammonia
- Base Chemical
- Biomass Power
- Chemical
- Chlor-Alkali
- Cogeneration
- Combined Cycle
- Desalination
- Drinking Water Treatment
- Energy Transition
- Food & Beverage
- Geothermal Power
- Hydro Power
- Industrial Water
- Iron & Steel
- LNG Liquefaction
- LNG Regasification & Storage
- LNG Supply Chain
- Methanol
- Mining & Metal
- Nuclear
- Ocean Thermal Energy Conversion
- Oil & Gas Downstream
- Petrochemical
- Pharmaceutical
- Power
- Processing & Fractionation
- Pulp & Paper
- Refining
- Specialty & Fine Chemical
- Water & Wastewater
Downloads
Brochures
- Liquid Analyzers in the Water Industry
- Model FU24 Challenging and harsh applications widebody type pH and ORP sensors (8.3 MB)
- Model FU20 Challenging and Harsh Applications Widebody Type pH and ORP Sensors (503 KB)
- Electrolysis Solutions: Instrumentation Solutions for Electrolysis Plant Applications (841 KB)
- Mining Solutions (3.2 MB)
Instruction Manuals
General Specifications
Technical Information
- Differential pH Successful Applications
- Best Practice Layup Procedure Guide (316 KB)
- Best Practice pH Installation and Maintenance Manual (824 KB)
- A Word About Buffers
- Care & Maintenance in High Purity Water (85 KB)
- Temperature Compensation (115 KB)
- Variopin Wiring Comparison (123 KB)
- Wet vs Dry Electrodes, Problems and Solutions (111 KB)
Certificates
- EU_UK Declaration of Conformity FU20 2022-11-14 (170 KB)
- KCs_FU20(21-KA4BO-0418X) (157 KB)
- KCs_FU20 21-KA4BO-0416X) (147 KB)
- EC Type Examination FU20, FU24, pH20, SC24V and SC25V (2.1 MB)
- KCs_FU20(21-KA4BO-0417X) (155 KB)
- KCs_FU24(21-KA4BO-0415X) (156 KB)
- DEKRA 11ATEX0014X-Iss2-E FU20, FU24, SC24V and SC25V (308 KB)
- FM20US0123X FU20, FU24, SC25V, SC4A, SC42, SX42 (410 KB)
- KCs_FU24(21-KA4BO-0413X) (155 KB)
- FM20CA0062X FU20, FU24, SC25V, SC4A, SC42, SX42 (390 KB)
- KCs_FU24(21-KA4BO-0414X) (155 KB)
- EU_UK Declaration of Conformity FU24 2022-11-14 (149 KB)
- IECEx_DEK_11_0064X_Iss1 FU20, FU24, SC24V and SC25V (868 KB)
- TS_FU20/FU24/SC25V (1.8 MB)
- EACEx_FU20/FU24/SC25V (3.7 MB)
- Ex NEPSI_FU20/FU24/SC25V (878 KB)
- PESO_FU20/FU24/SC25V (98 KB)
- Certificate IECEx FU20 FU24 SC24V SC25V (868 KB)
- EAC certificate for sensors (1.8 MB)
- FU20 CE Certification (317 KB)
- IECEx (308 KB)
- Mercury Free Declaration (101 KB)
- PH20 CE (329 KB)
- Shelf Life Statement (40 KB)