Dissolved oxygen probes work by measuring the amount of oxygen that diffuses via a permeable (or semi-permeable) membrane into the probe (sensor). Once เกจวัดแรงดันแก๊สlpgรถยนต์ enters the sensor, a chemical discount reaction occurs, producing an electrical signal. This signal is read by the DO probe and displayed on the meter.
There are two main sources of dissolved oxygen (DO): the atmosphere (molecular oxygen) and photosynthesis, which is a by-product. Most aquatic organisms want dissolved oxygen to survive, which is necessary for chemical processes in the aquatic environment. Depending on the business you’re employed in, it’s going to depend on the explanation you would possibly be testing for DO and what DO probe is best for you.
While there are numerous ways to check for DO, in case you are testing in the lab or within the field (wastewater treatment), the easiest method to check for DO in water is with an electroanalytical or electrochemical dissolved oxygen sensor probe.
Table of Contents
How do dissolved oxygen probes work?
Electric dissolved oxygen sensor probe
Polar spectrum dissolved oxygen sensor probes
How do I use a lab-grade DO probe?
How do I use an industrial DO probe?
What can have an effect on dissolved oxygen in water?
Apure dissolved oxygen probe(DO sensor) products
Summary
How do dissolved oxygen probes work?
Dissolved oxygen probes handle redox (redox) reactions, offering continuous and real-time measurements. Because they’ve an applied voltage, most DO probes require a “warm-up time” earlier than use to polarize the electrode earlier than measuring DO in water.
After connecting the DO probe to the meter, the electrode sensor (DO probe) is immersed in the resolution being measured. When the DO sensor is related to the meter, a voltage can be applied to the interior electrode. Oxygen (O2) molecules arrive at the membrane and attain the electrode by diffusion via the permeable/semi-permeable membrane. A small present flows between the electrodes (cathode and anode). The quantity of current flowing between the electrodes is proportional to the O2 focus in the solution. The quantity of DO in the resolution is measured by measuring the present using a calibrated meter.
However, the dissolved oxygen sensor does have drawbacks when performing DO measurements. It consumes an quantity of O2 from the solution equal to the quantity subtle within the sensor. As a end result, the quantity of O2 in the neighborhood of the DO probe decreases and subsequently, if a current probe is used, the DO probe should be stirred in resolution to have the ability to obtain an correct measurement.
Electric dissolved oxygen sensor probe
The uncooked electrical DO probe generates a voltage as O2 diffuses via the probe membrane. The thin semi-permeable membrane permits oxygen to cross by way of and prevents anything else from passing via.
As O2 passes by way of the membrane and the electrolytic solution to the electrode, it dissolves contained in the probe cap containing the buffered electrolyte, permitting the O2 to react with the cathode (platinum electrode), thereby gaining an electron. It is that this electron that is given to the O2 molecule, thus creating a voltage between the anode (silver chloride electrode) and the cathode contained in the DO probe.
Once the present is detected by the DO probe, the connected meter can convert the studying to a DO concentration.
Polar spectrum dissolved oxygen sensor probes
The polarimetric DO probe also incorporates a skinny semi-permeable membrane, however, a voltage is utilized between the anode and cathode of the DO probe. When O2 reaches the cathode, an electron is added to the O2 molecule, creating a current. It is that this voltage that drives the O2 reaction and determines the DO concentration.
At Apure, we offer laboratory grade and industrial DO present probes for a wide range of applications.
How do I use a lab-grade DO probe?
A laboratory grade DO probe consists of a PTFE membrane, a cathode and an anode immersed in an electrolyte. During use, O2 molecules diffuse via the DO probe membrane at a steady rate. Once the O2 molecules move via the membrane, they are decreased on the cathode, leading to a small voltage. When no O2 molecules are present, the DO meter will learn the voltage as zero mV (millivolts). As the number of O2 molecules increases, the DO probe reading increases as well.
Once your probe has recorded the voltage, it might be simply learn with a multimeter or analog-to-digital converter.
Laboratory grade DO probes could be fully submerged in recent or salt water indefinitely as a lot as the SMA connector.
How do I use an industrial DO probe?
An industrial DO probe works on the same precept as a laboratory grade probe, nevertheless it consists of a silicone membrane as an alternative of a PTFE membrane. If you’re utilizing an industrial DO probe, you’ll find a way to join it to a DO circuit and an RTD circuit via a carrier board, and for industrial processes, you probably can connect the DO probe to a DO transmitter.
Industrial DO probes may additionally be fully submerged in contemporary or salt water indefinitely up to the tinned lead connector.
What can affect dissolved oxygen in water?
When measuring dissolved oxygen, it is essential to consider the components that will affect the measurement. These embrace
Temperature
Salinity
Barometric pressure
Humidity
Apure dissolved oxygen probe(DO sensor) merchandise
KOG-202S Polarographic Dissolved Oxygen Sensor
Learn More KOG-202S Polarographic Dissolved Oxygen Sensor
KOG-206 Optical Dissolved Oxygen Sensor
Learn More KOG-206 Optical Dissolved Oxygen Sensor
A10 Optical Dissolved Oxygen Meter
Learn More A10 Optical Dissolved Oxygen Meter
Summary
The dissolved oxygen probe works by measuring the quantity of oxygen that diffuses via the membrane into the sensor. Once oxygen enters the sensor, a chemical discount response occurs, producing an electrical signal. The sign is read by the DO probe and displayed on the meter.
If you want to know extra about different water quality parameters, water high quality measurement, traits or water high quality analysis merchandise, please be at liberty to contact our professional team in Apure.
More on different water quality articles:
What Is Municipal Water?
Distilled Water vs Purified Water: What’s The Difference?
Solution of water pollution
Main water high quality indicators
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Dissolved oxygen probes work by measuring the quantity of oxygen that diffuses through a permeable (or semi-permeable) membrane into the probe (sensor). Once the oxygen enters the sensor, a chemical discount reaction occurs, producing an electrical sign. This sign is read by the DO probe and displayed on the meter.
There are two main sources of dissolved oxygen (DO): the atmosphere (molecular oxygen) and photosynthesis, which is a by-product. Most aquatic organisms want dissolved oxygen to outlive, which is important for chemical processes within the aquatic setting. Depending on the business you work in, it will depend on the explanation you would possibly be testing for DO and what DO probe is best for you.
While there are tons of ways to test for DO, if you’re testing within the lab or within the area (wastewater treatment), the best way to take a look at for DO in water is with an electroanalytical or electrochemical dissolved oxygen sensor probe.
Table of Contents
How do dissolved oxygen probes work?
Electric dissolved oxygen sensor probe
Polar spectrum dissolved oxygen sensor probes
How do I use a lab-grade DO probe?
How do I use an industrial DO probe?
What can affect dissolved oxygen in water?
Apure dissolved oxygen probe(DO sensor) merchandise
Summary
How do dissolved oxygen probes work?
Dissolved oxygen probes deal with redox (redox) reactions, offering continuous and real-time measurements. Because they’ve an utilized voltage, most DO probes require a “warm-up time” before use to polarize the electrode earlier than measuring DO in water.
After connecting the DO probe to the meter, the electrode sensor (DO probe) is immersed in the resolution being measured. When the DO sensor is linked to the meter, a voltage could be applied to the interior electrode. Oxygen (O2) molecules arrive at the membrane and attain the electrode by diffusion by way of the permeable/semi-permeable membrane. A small current flows between the electrodes (cathode and anode). The amount of current flowing between the electrodes is proportional to the O2 concentration in the resolution. The amount of DO in the resolution is measured by measuring the present using a calibrated meter.
However, the dissolved oxygen sensor does have drawbacks when performing DO measurements. It consumes an quantity of O2 from the solution equal to the amount subtle within the sensor. As a outcome, the amount of O2 in the vicinity of the DO probe decreases and due to this fact, if a present probe is used, the DO probe must be stirred in solution in order to obtain an accurate measurement.
Electric dissolved oxygen sensor probe
The raw electrical DO probe generates a voltage as O2 diffuses by way of the probe membrane. The skinny semi-permeable membrane allows oxygen to cross by way of and prevents the rest from passing via.
As O2 passes through the membrane and the electrolytic answer to the electrode, it dissolves contained in the probe cap containing the buffered electrolyte, permitting the O2 to react with the cathode (platinum electrode), thereby gaining an electron. It is this electron that is given to the O2 molecule, thus creating a voltage between the anode (silver chloride electrode) and the cathode contained in the DO probe.
Once the present is detected by the DO probe, the linked meter can convert the reading to a DO concentration.
Polar spectrum dissolved oxygen sensor probes
The polarimetric DO probe also contains a thin semi-permeable membrane, nonetheless, a voltage is utilized between the anode and cathode of the DO probe. When O2 reaches the cathode, an electron is added to the O2 molecule, creating a current. It is that this voltage that drives the O2 reaction and determines the DO focus.
At Apure, we offer laboratory grade and industrial DO current probes for a broad range of purposes.
How do I use a lab-grade DO probe?
A laboratory grade DO probe consists of a PTFE membrane, a cathode and an anode immersed in an electrolyte. During use, O2 molecules diffuse through the DO probe membrane at a steady fee. Once the O2 molecules pass through the membrane, they are lowered on the cathode, leading to a small voltage. When no O2 molecules are current, the DO meter will read the voltage as 0 mV (millivolts). As the variety of O2 molecules increases, the DO probe studying increases as nicely.
Once your probe has recorded the voltage, it could be simply learn with a multimeter or analog-to-digital converter.
Laboratory grade DO probes can be totally submerged in contemporary or salt water indefinitely as a lot as the SMA connector.
How do I use an industrial DO probe?
An industrial DO probe works on the same principle as a laboratory grade probe, nevertheless it consists of a silicone membrane as an alternative of a PTFE membrane. If you’re utilizing an industrial DO probe, you’ll have the ability to join it to a DO circuit and an RTD circuit by way of a service board, and for industrial processes, you’ll be able to connect the DO probe to a DO transmitter.
Industrial DO probes can be absolutely submerged in recent or salt water indefinitely as much as the tinned lead connector.
What can affect dissolved oxygen in water?
When measuring dissolved oxygen, it is necessary to consider the elements that may have an result on the measurement. These embody
Temperature
Salinity
Barometric pressure
Humidity
Apure dissolved oxygen probe(DO sensor) merchandise
KOG-202S Polarographic Dissolved Oxygen Sensor
Learn More KOG-202S Polarographic Dissolved Oxygen Sensor
KOG-206 Optical Dissolved Oxygen Sensor
Learn More KOG-206 Optical Dissolved Oxygen Sensor
A10 Optical Dissolved Oxygen Meter
Learn More A10 Optical Dissolved Oxygen Meter
Summary
The dissolved oxygen probe works by measuring the quantity of oxygen that diffuses through the membrane into the sensor. Once oxygen enters the sensor, a chemical reduction reaction occurs, producing an electrical signal. The signal is read by the DO probe and displayed on the meter.
If you wish to know more about different water quality parameters, water quality measurement, characteristics or water high quality evaluation products, please be happy to contact our professional staff in Apure.
More on different water quality articles:
What Is Municipal Water?
Distilled Water vs Purified Water: What’s The Difference?
Solution of water air pollution
Main water high quality indicators