MEJ-PH6.5 pH ORP meter

The MEJ-PH6.5 pH/ORP meter is a sophisticated and reliable instrument designed for accurately measuring the pH and oxidation-reduction potential (ORP) of various liquid solutions. It plays a crucial role in multiple industries where precise monitoring of these parameters is essential for ensuring product quality, process efficiency, and environmental compliance.​

Measurement Capabilities​ of the MEJ-PH6.5 pH/ORP meter

pH Measurement:​
The meter has a wide pH measurement range, typically spanning from 0 to 14 pH units. This comprehensive range enables it to handle acidic, neutral, and alkaline solutions with ease. Whether it’s a highly acidic chemical in a laboratory or a slightly alkaline water sample in environmental monitoring, the PH6.5 can provide accurate readings.​
The precision of pH measurement is remarkable, with an accuracy of ±0.02 pH. This high – level precision is crucial in applications such as pharmaceutical manufacturing, where even minor pH variations can affect the quality and efficacy of drugs.​
ORP Measurement:​
For ORP measurement, it covers a broad range from – 2000 to 2000 mV. ORP is an important parameter in many chemical and biological processes. In wastewater treatment plants, for example, monitoring ORP helps in determining the effectiveness of oxidation or reduction processes. A change in ORP values can indicate the progress of reactions that break down pollutants.​
The accuracy of ORP measurement is ±1 mV, ensuring reliable data for applications where ORP is a critical factor.​

Input and Power Features​ of the MEJ-PH6.5 pH/ORP meter

High Input Resistance:​
With an input resistance of ≥10¹²Ω, the MEJ-PH6.5 pH/ORP meter can minimize the impact of external electrical interference on the measurement. This is especially important in industrial environments where there may be a lot of electrical noise from machinery and equipment. A high input resistance allows the meter to maintain stable and accurate readings.​
Flexible Power Supply:​
It offers multiple power supply options. It can operate on a 220V ± 10%, 50Hz/60Hz power source, which is commonly available in most industrial and laboratory settings. Additionally, it supports a 24V ± 20% power supply, providing more flexibility in applications where a lower – voltage power source is preferred or more accessible.​

Output and Connectivity Options​ of the MEJ-PH6.5 pH/ORP meter

Analog Output:​
The meter provides a 4 – 20mA analog output. This standard analog signal can be easily integrated into existing industrial control systems. For instance, in a chemical processing plant, the 4 – 20mA signal can be used to control the dosing of chemicals based on the measured pH or ORP values, ensuring that the process remains within the desired parameters.​
Digital Communication:​
Equipped with an RS485 interface, it supports the Modbus – RTU protocol. This digital communication capability allows for seamless connection to a computer or other monitoring devices. In a large – scale water treatment facility, multiple PH6.5 meters can be networked together via RS485, and the data can be collected and analyzed in a central control room, enabling real – time monitoring and remote control.​
Relay Output:​
The relay output feature is useful for alarm and control functions. When the measured pH or ORP values exceed or fall below pre – set thresholds, the relay can be activated. In a food and beverage production facility, if the pH of a product being processed goes out of the acceptable range, the relay can trigger an alarm and also initiate corrective actions, such as stopping the production line or adjusting the ingredient dosing system.​

Temperature Compensation​ of the MEJ-PH6.5 pH/ORP meter

The MEJ-PH6.5 pH/ORP meter supports both manual and automatic temperature compensation. The temperature measurement range typically extends from – 10 to 130℃, and it can be used with NTC 10k or PT1000 temperature sensors. Temperature can have a significant impact on pH and ORP measurements. By compensating for temperature changes, the meter can provide more accurate readings, regardless of the ambient temperature conditions. In a thermal power plant, where the temperature of the water being monitored can vary widely, temperature compensation ensures that the pH and ORP measurements are reliable.​

Applications​ of the MEJ-PH6.5 pH/ORP meter

Industrial Applications:​
In chemical processing plants, it is used to monitor and control the pH and ORP during chemical reactions. Precise control of these parameters can improve product yield and quality. For example, in the production of dyes, the pH of the reaction mixture needs to be carefully maintained to achieve the desired color and purity of the final product.​
In water treatment plants, whether it’s for municipal water supply or industrial wastewater treatment, the PH6.5 is essential. It helps in ensuring that the water meets the required quality standards. In wastewater treatment, monitoring ORP can indicate the effectiveness of disinfection processes, while pH control is crucial for preventing corrosion in pipes and equipment.​
In the food and beverage industry, it is used to monitor the pH of products during production. For example, in brewing, the pH of the wort affects the fermentation process and the final taste of the beer. In dairy production, the pH of milk and dairy products is monitored to ensure product safety and quality.​
Environmental Applications:​
In environmental monitoring, it is used to measure the pH and ORP of natural water bodies such as rivers, lakes, and oceans. Changes in these parameters can indicate pollution or other environmental changes. For example, a decrease in the pH of a lake may be a sign of acid rain or pollution from industrial runoff.​
Biochemical and Pharmaceutical Applications:​
In biochemical research, the PH6.5 is used to monitor the pH and ORP in cell cultures and biological reactions. In pharmaceutical manufacturing, it is used to ensure the quality and stability of drug formulations. The pH of a drug solution can affect its solubility, stability, and efficacy.​
In summary, the MEJ-PH6.5 pH/ORP meter is a versatile and high – performance instrument that offers accurate measurements, multiple connectivity options, and temperature compensation, making it an ideal choice for a wide range of applications in various industries.