Rosemountt 3900 General Purpose pH/ORP Sensor for Liquid Analysis

• Customization: Available
• Place of Origin: Singapore
• Voltage: 220V
• Model NO.: Rosemountt 3900
• Warranty: 1 Year
• Brand Name: Rosemount-
• Customized Support: OEM, ODM, Obm
• Measurement Range: 100psig(790kpa(ABS)
• Product Name: Rosemount-3900
• Model: 3900
• Usage: Auto Testing Machine
• Max. Operating Pressure: Maximum Pressure 790 Kpa [ABS] (100 Psig) at 100
• Operating Temperature: -10° to 100°c (14° to 212°f)
• Process Connection: Front Facing Mnpt
• Condition: 100% Brand New Original
• Application: Chemical Power Oil Gas Sewage Treatment
• Industry: Industrial Control Equipment Automation Industry
• Transport Package: Original and New
• Specification: 10X10X10 cm
• Trademark: Rosemount-
• Origin: America
• HS Code: 8409999990
• Production Capacity: 1000 Piece/Year
• Package Size: 10.00cm * 10.00cm * 10.00cm
• Package Gross Weight: 2.000kg

Product Description

Product Description

Rosemount 3900 

In the field of industrial process control and environmental monitoring, accurate measurement of pH and oxidation - reduction potential (ORP) is of utmost importance. The Rosemount 3900 General Purpose pH/ORP Sensors, developed by Emerson, have emerged as a reliable and versatile solution for a wide range of applications. These sensors are designed to provide high - quality measurements in various aqueous solutions, ensuring process stability, product quality, and environmental compliance.

For ORP measurement, the Rosemount 3900 uses an inert metal electrode, typically platinum. The ORP is a measure of the tendency of a solution to accept or donate electrons. When the platinum electrode is immersed in a solution, redox reactions occur at the electrode - solution interface. The potential of the platinum electrode relative to a reference electrode (such as the double - junction reference electrode in the Rosemount 3900) is measured, and this potential is related to the ORP of the solution. The ORP value is a key parameter in processes involving oxidation or reduction reactions, such as water treatment, chemical synthesis, and corrosion monitoring.

The Rosemount 3900 sensors are designed to operate within a wide temperature range of - 10°C to 100°C (14°F to 212°F). This broad temperature range makes them suitable for applications in both cold and hot environments. For example, in some industrial cooling water systems, the temperature may drop close to freezing during winter, while in certain chemical reaction processes, the temperature of the process fluid can reach up to 100°C. The ability of the Rosemount 3900 to function accurately across this temperature spectrum ensures its applicability in diverse industrial scenarios.

1. Design Features

1.1 Double - Junction Reference
1.1.1 Function and Advantage
One of the key design features of the Rosemount 3900 is its double - junction reference. The double - junction design plays a crucial role in protecting the reference element from poisoning ions. In many industrial and environmental applications, solutions may contain ions such as ammonia (NH3), chlorine (Cl2), cyanides (CN−), and sulfides (S2−) that can react with the reference electrode and interfere with its proper functioning. The double - junction reference creates a barrier between the reference element and the process solution. The outer junction is in contact with the process solution and is filled with a non - reactive electrolyte. This outer junction prevents the poisoning ions from reaching the inner reference element, which is filled with a more sensitive electrolyte. As a result, the sensor's resistance to harsh environments is significantly enhanced, and its lifespan is prolonged. For instance, in a wastewater treatment plant where the influent may contain high levels of sulfides from industrial discharges, the double - junction reference of the Rosemount 3900 ensures that the sensor can accurately measure the pH and ORP without being affected by the sulfide ions.
1.1.2 Teflons® Junction Material
Both the pH and ORP sensors in the Rosemount 3900 are made with a porous Teflons® junction. Teflons®, also known as polytetrafluoroethylene (PTFE), is a highly inert and chemically resistant material. The porous structure of the Teflons® junction allows for the slow diffusion of the electrolyte between the reference compartments and the process solution. This controlled diffusion helps maintain a stable reference potential while preventing the ingress of contaminants. The chemical resistance of Teflons® ensures that it does not react with the wide variety of chemicals present in industrial and environmental solutions, further enhancing the durability and reliability of the sensor.
1.2 Robust Body Construction
1.2.1 Polyphenylene Sulfide (PPS) Body
The Rosemount 3900 features a rugged polyphenylene sulfide (PPS) body. PPS is a high - performance thermoplastic with excellent chemical resistance. It can withstand exposure to a wide range of aggressive chemicals, including strong acids, bases, and solvents.

2.Application Areas

2.1 Industrial Process Monitoring
In the chemical industry, the Rosemount 3900 is widely used in various chemical synthesis processes. For example, in the production of pharmaceuticals, accurate pH control is crucial for ensuring the quality and yield of the final product. The Rosemount 3900 can be used to monitor the pH of reaction mixtures during pharmaceutical synthesis. In a chemical reaction where a specific pH range is required to drive the reaction forward and obtain the desired product purity, the sensor provides real - time pH measurements. Any deviation from the optimal pH can be detected immediately, allowing operators to adjust the process parameters, such as the addition of acids or bases, to maintain the correct pH. In the production of polymers, the ORP measurement of the Rosemount 3900 can be used to monitor the oxidation or reduction reactions involved in polymerization processes. By controlling the ORP, manufacturers can ensure consistent polymer properties.
2.1.2 Food and Beverage Industry
In the food and beverage industry, the Rosemount 3900 is used for quality control and process optimization. In the brewing process, for example, pH measurement is critical at various stages. The pH of the wort (the liquid extracted from malted grains) affects the activity of yeast during fermentation. The Rosemount 3900 can accurately measure the pH of the wort, enabling brewers to adjust the mashing process (the process of extracting sugars from malt) to achieve the desired pH for optimal yeast fermentation. In the production of dairy products, such as cheese and yogurt, the pH is an important parameter for determining the quality and texture of the final product. The sensor can be used to monitor the pH during the fermentation and coagulation processes in dairy production. Additionally, in food canning processes, the Rosemount 3900 can be used to measure the pH and ORP of the brine solutions used for preservation, ensuring food safety and quality.
2.2 Water Treatment
In municipal water treatment plants, the Rosemount 3900 is used in multiple stages of the treatment process. During the coagulation and flocculation stage, where chemicals are added to the raw water to remove suspended particles, the pH of the water needs to be carefully controlled. 

Specification

operating temperature	-10°C to 100°C
Maximum working pressure	790 kPa
material (that sth is made of)	stainless steels
process connection	3/4"  1" MNPT
(electric) cable	10m

Company Profile

KeRui (WeiFang) Automation Equipment Co., Ltd. is specialized in industrialautomation instrument development, production and sales, technical servicesand supporting equipment supply of specialized companies. The mainproducts are fow meters, level meters, temperature meters, pressuremeters, electrical meters, thermal meters, programmable controller(PLC),Dcs distributed control system, eight series of more than 1,000specifcations. lts products and technologies are widely used in electricpower, metallurgy, petrochemical, environ- mental protection, plasticsfood,l printing, tobacco, textile, dyeing and other fields.

Certifications

Our Service

OEM / ODM services
To meet the user diversified requirement, Holykell have established a set of customer service and technical support system with OEM / ODM order as the center, and responded and Handle the customer's requirements in a timely manner to ensure accurate delivery time and product quality.
Order services
Fastest reply:Professional sales engineers 7/24 online services
Payment terms:T/T ,Western union, Paypal, Credit Card, L/C others
Fast delivery: within 24 hours release the cargo (normal spec.), Customized 7-12 days after payment .
 
MAINTENANCE & AFTER-SALES SERVICES
Customer Feedback:  Sales engineers and technical engineers will be one-on-one service for you to exclude all obstacles when use our sensors.
Warranty period: 12 months
Product life-long maintenance: Holykell can provide you with the maintenance of the whole life of the sensors

Packaging & Shipping

FAQ

Q: How long will you give me the reply? 
A: We will reply to you as soon as we see the information 
Q: What is the delivery time? 
A:The products in stock will be shipped after receiving the payment, and the products that need to be ordered are subject to the factory time. 
Q: How about your package? 
A: Do not worry about the package, we have rich experience in packing.
Q: How about the payment terms? 
A:You can choose T/T.