Wastewater Industry Composite PH Electrode MX-PH-01

NegotiableUpdate on 01/21

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Nature of the Manufacturer: Producers

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Overview

Product principle pH meter: refers to an instrument used to determine the pH value of a solution

Product Details

Product Principle

PH meter: refers to an instrument used to determine the pH value of a solution. A pH meter operates based on the principle of a primary battery. The electromotive force between the two electrodes of the primary battery is determined by Nernst's law, which is related to both the electrode properties and the concentration of hydrogen ions in the solution. There is a corresponding relationship between the electromotive force of the primary battery and the concentration of hydrogen ions, and the negative logarithm of the concentration of hydrogen ions is the pH value.
There is an excess of hydrogen ions H⁺The solution is acidic. Acid can make hydrogen ions H in aqueous solutions⁺Free substances. Similarly, if OH - ions are ionized, the solution becomes alkaline. So, give H⁺The value is sufficient to indicate the characteristics of the solution, whether it is acidic or alkaline. In order to avoid using this molecular concentration negative exponent for calculation, biologist Soernsen suggested in 1909 to replace this inconvenient value with a logarithm and define it as the "pH value". Mathematically, pH is defined as the commonly used logarithmic negative value of hydrogen ion concentration. That is, pH=- log [H]⁺]
The current industrial method for measuring water pH value is the potentiometric analysis method: the electrode used in the potentiometric analysis method is called the primary battery. A primary battery is a system that converts chemical reaction energy into electrical energy. The voltage of this battery is called electromotive force (EMF). This electromotive force (EMF) is composed of two half cells, one of which is called the indicator electrode, and its potential is related to a specific ion activity, such as H⁺The other half cell is the reference half cell, commonly referred to as the reference electrode, which is usually connected to the measuring solution and connected to the measuring instrument (MX-PHYB-01). Thus effectively measuring and detecting the acidity and alkalinity in water quality.

Application field

Industrial automation application field
In terms of wastewater treatment and sewage testing
Mining and smelting, papermaking, and pulp concentration
Environmental protection industry, desulfurization and denitrification, wastewater evaporation
Medical and health applications, food and beverage processing industry
Experimental or testing equipment, water treatment plant
Petrochemical, textile drawing and other industries

Product Features

The electrode casing is made of PON material and is suitable for various complex environments
☛ Can withstand high temperatures up to 80 ℃ and strong acid and alkali corrosion
The electrode is made of low impedance glass film and can be applied to pH measurement under various conditions,
Has the characteristics of fast response and good thermal stability; Has good reproducibility, is not easily hydrolyzed, and basically eliminates alkali errors
The electrode itself adopts cylindrical spherical bubbles, with a large contact area and sensitive area, which accelerates response time and enhances signal stability
Glass has strong impact resistance, more than 35% higher than ordinary electrodes in terms of impact strength
☛ Has good waterproof properties and strong resistance to UV corrosion

Technical Specifications

Measuring range	0-14PH
Comprehensive accuracy:	±0.02PH
Operating Temperature	0-80°
Response time:	＜30sec
Normal zero position:	7±0.5PH
Sensitive film resistance:	≤250MΩ
Voltage endurance range:	≤0.4MPA
Connection method:	Upper and lower 3/4NPT pipe thread connection (other methods with adapter)
Outgoing method:	Direct outgoing line (A); Y-shaped interface (B); OT interface (C) (default direct output)
Temperature compensation:	NTC 10K； PT100; PT1000 (default not available)
Slope range:	≥98%

Ordering Guide

model	range	qualification method	temperature compensation	none	none	Other requirements
MX-PH-01	0-14PH	Direct outgoing line	10K	none	none	---
Ordering example: MX-PH-01-A-10K

Maintenance matters

1. The glass electrode socket should be kept dry, and it is strictly prohibited to come into contact with harmful gases such as salt spray or water solution to ensure high input impedance of the instrument. 2. There is an appropriate amount of 3.3mol/L KCl solution in the protective cap at the front end of the electrode, and the electrode tip is immersed in it to maintain the activation of the sensitive membrane and the liquid interface.
3. When using the electrode, it is necessary to remove the transparent protective cap on the front and immerse the glass bulb and the liquid contact part into the measured medium. When installing and fixing, please use raw materials to do a good job of waterproof sealing to prevent water from entering the PH electrode and causing a short circuit in the PH electrode cable.
4. New electrodes or electrodes that have been unused for a long time must be soaked in distilled water for several hours (or dechlorinated) before use. Reduce the asymmetric potential of the electrode to achieve stability and lower the internal resistance of the electrode. 5. During measurement, the electrode bubbles should be fully immersed in the measured solution. 6. Users need to regularly clean the sensitive film in front of the electrode. For electrodes that have been in use for a long time, their glass film may become transparent or adhere to deposits. At this time, they should be washed and washed with water.
7. The electrode should be cleaned when not in use and inserted into a protective cap with saturated solution
8. There should be no bubbles in the solution to avoid disconnecting the measurement circuit. 9. PH electrode is a consumable due to the harsh measurement environment. Its normal service life is one year, and improper maintenance can shorten it
10. Storage of pH glass electrode: short-term: stored in a buffer solution with pH=4; Long term: stored in a buffer solution with pH=7.

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