What is a ph sensor?
As we all know, the choice of water quality sensor is very important. In the measurement of water, pH sensor is one of the important tools. However, the wide variety of pH sensors on the market has left many consumers wondering “how do I choose the right pH sensor?” “, “Where do I start? . This requires us to understand ph sensor information before use or purchase, and then choose the right sensor. In this article, we provide you with the types and applications of pH sensors suitable for different places.
A ph sensor is a sensor used to detect the concentration of hydrogen ions in solution and convert it into a corresponding usable output signal. It usually consists of a chemical part and a signal transmission part. The measurement range is 0-14 digits. A value of 7 indicates neutrality. The higher the value, the more alkaline; The lower the value, the stronger the acidity. ph sensors are often used for industrial measurements of substances such as solutions and water.
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Different types of pH sensors
According to the different use environment, there are a variety of pH sensors on the market. The right choice of ph sensor can make your project more effective. Conversely, choosing the wrong pH sensor will not only lead to inaccurate measurements, but also damage the electrodes, resulting in increased engineering costs. For different applications, we introduce the following four most widely used ph sensor electrodes:
1, pH composite sensor
An electrode that combines a pH glass electrode with a reference electrode is called a pH composite sensor. If the shell is plastic, it is called plastic shell pH composite sensor. If the enclosure is glass, it is called glass pH composite sensor. The biggest advantage of composite sensor is two in one, easy to use.
Dc power supply (default) : 12-24 V DC
Energy consumption :≤0.15W(@12V DC,25°C)
Measurement accuracy :±0.5pH
PH measurement range: 0-14pH
PH resolution: 0.01pH
Output signal: RS485 (Mondbus protocol) /4-20mA output (optional)
Temperature compensation: -20°C-80°C (manual/automatic)
Response speed: ≤15s
Relay alarm: two normally open normally closed alarm relay
2.PH meter-Water PH sensor
The water quality PH analyzer can accurately measure the pH of the water quality with accurate measurement and fast response. It is an essential instrument for water quality monitoring.
Model: JXBS – 3001 – PH – 10
Communication mode: 4-20mA
Power supply: 12-24V power supply
Power consumption: ≤0.15W (@12V DC, 25℃)
Measurement accuracy: ±0.5pH
PH measurement range: 0-14pH
PH measurement resolution: 0.01pH (default)
Temperature compensation: -20℃-80℃ (manual/automatic)
Response speed: ≤15s
3.Multi-parameter water quality Analyzer
The Multi-parameter water quality detector can freely match the measurement items according to the user’s needs; the whole machine adopts the integrated design of the mold, and the appearance is fashionable; the application of the new touch screen menu operation technology realizes the practical and intelligent functions of the instrument, and has acid and alkali resistance, corrosion resistance.
Connectable equipment:1-4 Modbus device combination
Letter of agreement:ModBus serial communication protocol
Display Data:Equipment raw data
Operating temperature:-20°C to 50°C
Working humidity :<90%RH non-condensing
Power supply:12VDC, 2500 mAh (standard) lithium battery
Instrument power:AC (220V ± 5%)
Display method:2.8 inch LCD screen
Communication method:USB (read, see DB9 interface information for details)
Data storage:2MB storage space
Charging time:≤8H(standard configuration)
Size:1256545mm
Weight:300 grams
How do I maintain the pH sensor?
If you want to keep the pH sensor in good condition, you must maintain the pH electrode regularly. Some common problems that can affect the electrode if not properly maintained include oily coating on the electrode, blocked or scaled reference contacts, faulty or broken PH bulbs, and shortened electrode life due to reference poisoning.
If the electrode is usually coated with oil and other substances, consider using a sensor that contains a non-porous reference contact. Using an automated system to clean electrodes can further reduce your maintenance requirements. If the reference end is frequently blocked or scaled, a non-porous electrode can also be used to solve this problem. If your pH bulb breaks when it comes into contact with sewage, you can use a bulb guard to protect it. As for the problems of reference poisoning, these can be avoided by using non-porous electrodes.