standard type electrode: LDO10103(3 m cable) rugged type electrode:

LDOTM Portable Dissolved Oxygen Meter
LDOM portable dissolved oxygen meter LDOTM portable oxygen meter is a two-rescue portable instrument developed by Hash Company using the latest technology and suitable for laboratory and field testing.
A New Technique for Dissolved Oxygen Measurement-Fluorescence Law Measurement of Dissolved Oxygen
HACH's LDO dissolved oxygen sensor is covered by a layer of fluorescent material, when the LED light source emits blue light to the sensor surface of the fluorescent material, the fluorescent material is excited to release red light, from the release of blue light to the red light of this period of time is recorded, the higher the oxygen concentration in the water, the shorter the time to release red light. The correlation between the release time of red light and the concentration of dissolved oxygen is established. The instrument calculates the concentration of dissolved oxygen by measuring the release time of red light, and then directly displays the concentration of dissolved oxygen on the screen,
Advantages of portable LDO dissolved oxygen meter
In terms of the technology of measuring dissolved oxygen, the portable detector with LDO probe has many advantages compared with the traditional dissolved oxygen meter based on current or machine spectrum:[1) non-polarization: when measuring dissolved oxygen, LDO dissolved oxygen meter probe does not need polarization time. Traditional dissolved oxygen probes usually have a planned process before use
[2) No need to calibrate The LDO dissolved oxygen probe has been calibrated before leaving the factory, so users do not need to calibrate when using it, and can directly measure the dissolved oxygen concentration. When the traditional dissolved oxygen meter is used, there is usually a calibration step. After the calibration is passed, the dissolved oxygen can be measured.
[3) Low maintenance LD probe is a non-membrane probe without membrane replacement, and the components do not need to be filled with electrolyte. The amount of maintenance is greatly reduced, which not only saves time, but also reduces the maintenance cost of users.
[4) Strong anti-interference ability, LDO probe is a membrane-free probe, so it is not interfered by chemicals in typical wastewater
[5) Durable light-consuming cap The fluorescent cap can maintain its accuracy even if it is scratched or partially contaminated, and it is easy to clean
Technical indicators
Technical parameters of portable oxygen analyzer measuring range 0.01-20mg/L(ppm);0-200% saturation
Resolution 0.01mgL
Hash Operation Guide] LDO Portable Fluorescence Dissolved Oxygen Analyzer HQ30d Series (LDO)
Easy Operation Guide-HQ30d Series (LDO)
Requirements for use environment
LDO probe can be used for municipal sewage, industrial sewage, drinking water, environmental monitoring, education, scientific research and other fields of water sample measurement
2. instrument boot
1. Instrument operation panel and display are as follows:

2. The display content of the instrument is shown in the following figure

3. Before using the new LDO probe, first install the sensor cap on the probe and then install the light shield. A probe without a sensor cap must not be inserted directly into the water sample for measurement.
4. After the new instrument is powered on for the first time, the instrument display requires a probe to be connected. At this point, press the instrument option key to set the date and time of the instrument, and then connect the new probe to the instrument.
3. instrument operation
(I) sample measurement
The sensor cap calibration data of the LDO dissolved oxygen probe is already included in the button cell ibutton, so the user can start the measurement directly without calibration. Put the probe into the water sample and press the green key directly to read out the data (II) probe calibration.
If the user wants to calibrate the probe himself, a user method can be set up to calibrate it. After the calibration, the user can use their own calibration data for measurement, you can also select the instrument default calibration data for measurement. Press the instrument option key, select "LD0101 method>Save Current method As" in the displayed menu, and select a new method name (such as method 1) for saving. Then press the instrument option key, select "LDO101" in the displayed menu, and select the calibration data as "User", so that the instrument method>Mlodify Current Method>Calibration calibration can be performed.
The water-saturated air method is usually selected for probe calibration. Prepare a glass bottle that can be inserted into the LDO probe, add a small amount of water, and after full shaking, insert the LDO probe into the bottle so that the probe sensor cap cannot touch the water surface. Press the blue key and calibrate according to the on-screen instructions.
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(III) replacement sensor cap
The probe sensor cap needs to be replaced once a year to ensure the accuracy of the measurement data. The newly ordered sensor cap will have a button cell ibutton with calibration data. After the sensor cap and button cell are replaced at the same time, the sample measurement can be performed again. (IV) other operations
You can press the instrument option key to set the instrument display, sound, temperature unit, reading mode, etc. Please refer to the instrument manual for specific operation.
4. Instrument Maintenance and Precautions
1. The probe sensor cap needs to be replaced once a year to ensure the accuracy of the measurement data.
2. After the measurement, clean the LDO probe in time, dry and save.
3. Do not use sharp objects and organic solvents when cleaning the LDO probe, otherwise it will cause the fluorescent layer of the sensor cap to scratch or fall off, making the probe unusable.
4. Do not put the sensor cap of the LDO probe straight to the sun, otherwise it will affect the service life of the sensor cap. Use a hood. 5. Main Spare Parts List
Spare part name:
LDO probe, standard with 1 m cable
LDO probe, standard with 3 m cable
LDO probe, rugged, with 5 m cable
LDO Sensor Cap

pHC10103 (3 m cable wire) gel-hardened composite electrode:

CDC40103(3 m cable) rugged electrode: CDC40105(5 m), CDC40110(10 m), CDC40115(15 m), CDC40130(30 m dissolved oxygen electrode

pH electrode
Ultra liquid-filled standard composite electrode: pHC28101(1 m cable), pHC28103 (3 m cable) gel standard composite electrode: pHC10101(1 m cable), pHC10103 (3 m cable) gel rugged composite electrode: pHC10105 (5 m cable), pHC10110 (10 m cable), pHC10115 (15 m), pHC10130(30 m)
Liquid-filled standard composite electrode: pHC30101 (1 m cable), pHC30103 (3 m cable) ORP electrode
Gel standard composite electrode: MTC10101 (1 m), MTC10103(3 m) gel solid composite electrode: MTC10105 (5 m), MTC10110(10 m), MTC10115(15 m), MTC10130 (30 m) liquid-filled standard composite electrode: MTC30101 (1 m cable), MTC30103 (3 m cable) conductivity electrode
Standard electrode: CDC40101(1 m cable), CDC40103(3 m cable) rugged electrode: CDC40105(5 m), CDC40110(10 m), CDC40115(15 m), CDC40130(30 m dissolved oxygen electrode
Standard type electrode: LDO10101 (1 m cable), LDO10103(3 m cable) rugged type electrode: LDO10105 (5 m cable), LDO10110 (10 m cable), LD010115 (15 m), LDO10130 (30 m) ISE ion selective electrode
Sodium ion selective electrode: ISENa38101 (1 m cable), ISENa38103 (3 m cable) ammonia nitrogen electrode: ISENH318101 (1 m), ISENH318103 (3 m), ISENH418101 (1 m), ISENH418103 (3 m) chloride electrode: ISECl18101(1 m cable), ISECI18103 (3 m cable) fluoride electrode: IS

For more information, it is recommended to consult the relevant experts or consult the product manual
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