Mettler pH electrode InPro2000I/SG/250/9848

Specification - pH Sensor InPro 2000i SG/250/9848

Mettler pH electrode InPro2000I/SG/250/9848

9848: Suitable for biochemistry, media containing proteins, organic solvents, and low temperatures
9816: Suitable for chemical processes, slow electrolyte flow rate 9830: Suitable for media containing a large amount of organic solvents 9823: Classic electrolyte, fast electrolyte flow rate, helps with membrane cleaning

InPro2000ipH electrode with ISM function
AK9 cable interface

Operation
5.1 Calibration of sensors and pH transmitters
For the InPro 2000() sensor, it is recommended to perform 2-point calibration. Sensors that are ready for installation or have already been installed inside the protective sheath can be used for calibration. After removing the moisturizing cap, immerse the sensor in two different buffer solutions with a given reference pH value, and calibrate the transmitter according to these buffer values.
5.2 Sensor disinfection
In aseptic processes (such as in fermentation applications), sensors should be disinfected before production. Usually, steam or ultra-high temperature process media are used for disinfection when the sensor has been installed in the reaction vessel with a protective sheath.
5.3 Sheath pressurization
When disinfecting and operating the sensor normally, it is necessary to adjust the pressure of the sheath and electrolyte to be higher than the effective pressure inside the reaction vessel. This measure is essential to prevent the medium from entering the electrolyte. It is necessary to determine the pressure difference based on experience and specific circumstances to maintain diaphragm cleanliness and achieve acceptable electrolyte filling intervals.

brief introduction
According to Annex I of Directive 2014/34/EU (ATEX95), what is the pH electrode type InPro? 2XXX, InPro 3XXX, and InPro 4XXX belong to device group II; Category 1/2G, according to Directive 99/92/EC (ATEX137), can be used in Zone 0/1 or 1/2 or 1 or 2, as well as in Class IA, IB, and IC gases, which have potential flammability due to the presence of flammable substances within the temperature range of T3 to T6.
During use/installation, it is necessary to comply with the relevant requirements of EN60079-14.
For pH electrode simulation models, the pH measurement circuit, temperature measurement circuit, and data chip circuit are part of a universal intrinsic safety system and are connected to and operated through a separately certified transmitter.
The digital model pH electrode is connected to a 2-wire cable and operated through a 2-wire cable connected to a certified transmitter.
Intrinsic safety circuits have current isolation for peaks from non intrinsic safety circuits up to 375V rated voltage and from grounded components up to 30V rated voltage.

The importance of dissolved oxygen in fermentation has led amino acid production companies to develop low-temperature liquefied clear liquid fermentation technology for their numerous products. In the aerobic fermentation process of amino acid production control, dissolved oxygen content is one of the most important parameters for maximizing yield. The instrument and equipment engineers of Fengyuan Biochemical Co., Ltd. need to ensure that sufficient but not excessive oxygen is input into the reaction vessel (which will mean no need to use an air compressor) Thus optimizing microbial growth and metabolism. This requires an accurate and reliable online dissolved oxygen measurement system with high repeatability. We compared the performance of the optical dissolved oxygen sensor with the polarographic sensor they had been using previously. During the fermentation process, the relative value of dissolved oxygen content is more meaningful than the absolute value of dissolved oxygen content. This requires setting the dissolved oxygen of different batches of fermentation to the same value. Only then can the fermentation result data be analyzed and compared. However, when the fermentation of each fermentation tank is completed, the dissolved oxygen sensor will drift to a certain extent. Sometimes the reading may be too high. This means that the dissolved oxygen sensor needs to be calibrated before loading each tank. The maintenance workload is increased and the production efficiency is low. If the sensor membrane or electrolyte needs to be replaced, time needs to be spent on polarization. I hope to find the advantages that can be obtained by using optical oxygen sensors.