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Instrument Introduction
The LH-E2DO, paired with a fluorescence dissolved oxygen digital electrode, is suitable for various outdoor working environments. Equipped with our self-developed LHOS intelligent interactive system, it is easy to operate. With a built-in high-capacity rechargeable lithium battery, it can work in the wild for extended periods, making it highly applicable to wastewater treatment processes. The instrument features stable performance, accurate measurements, a wide measurement range, powerful functions, and simple operation. It is a portable water quality dissolved oxygen meter that integrates detection, monitoring, and data management for users in the wild and in the laboratory.
Features
1. This instrument is a handheld and portable multi-parameter meter developed based on the LHOS system from Lianhua, belonging to the Electrochemical Spark series. All electrodes used are digital electrodes, which, compared to polarographic electrodes, have no transmission distance limitation and are more suitable for outdoor use.
2. The host adopts a handheld design, weighing 0.48kg and measuring (220×85×38) mm. It can be held with one hand, is lightweight and doesn't take up much space, and can be placed anywhere.
3. The host adopts a concealed desktop stand and a detachable wrist strap design, allowing for both laboratory use on the desktop and field use, easily adapting to various usage scenarios.
4. The instrument features a 4.3-inch full touch screen, making operation convenient and functional modules easily visible at a glance.
5. Equipped with a standard fluorescence dissolved oxygen electrode, it can be expanded to measure other parameters, including pH, dissolved oxygen, conductivity, salinity, TDS, ORP, turbidity, COD, temperature, ammonia nitrogen, chlorophyll, blue-green algae, sludge concentration, and other indicators.
6. The instrument is equipped with a massive built-in storage space, capable of storing up to 10,000 pieces of data, which can be freely viewed and also transferred to a computer via USB.
7. The instrument is equipped with Bluetooth function and can be paired with a Bluetooth printer to print both current and historical data.
8. Automatic electrode recognition, plug and play without manual selection of measurement parameters.
9. The instrument is equipped with a 7000mAh high-capacity rechargeable lithium battery, allowing it to operate for extended periods in the wild. It adopts a Type-C charging interface, providing strong universality.
10. The instrument supports dual power supply modes, including adapter power supply and built-in lithium battery power supply. When using adapter power supply, the instrument automatically gives priority to the adapter, extending battery life.
11. The entire machine boasts a robust dust and water resistance rating, with the electrodes supporting IP68 dust and water resistance; the entire instrument supporting IP67 dust and water resistance; all interface positions can withstand short-term immersion under normal temperature and pressure, making it more suitable for field use, without exposure to rain and immersion.
12. The instrument is equipped with three reading modes: real-time reading, timing reading, and interval reading, ensuring the accuracy and stability of the detection results, and the reading time can be modified; timing reading and interval reading can automatically save the detection results.
13. Fully digital electrodes, equipped with automatic temperature compensation and atmospheric pressure compensation functions, as well as manual salinity compensation, enable more stable and accurate measurements.
14. Intelligent power-saving design, featuring an automatic screen sleep function, allows for setting a sleep time to prevent power waste when the instrument is not in use.
15. Equipped with a calibration mode, one-click calibration makes operation simple.
16. The default wire length of the electrode is 5 meters, and other wire lengths can be customized.
17. The main unit and electrodes are stored in a three-proof (waterproof, dustproof, and drop-proof) portable case, making it convenient to carry outdoors and providing strong protection.
18. The electrode is fixed using threaded connection, ensuring stable connection and long service life.
19. Possess provincial-level calibration and verification certificates for measurement units.
20. Possessing a design patent, with patent number: ZL202530159951.2.
Technical Specifications
| Test Item | Dissolved Oxygen (DO) |
| Measurement range | (0~20) mg/L or (0~200) % saturation |
| Response time | 10 seconds |
| Measurement accuracy | ±1% |
| Resolution | 0.01mg/L |
| Protection level | IP68 |
| Calibration method | 1-point calibration |
| Temperature compensation range | (0-50)℃ |
| Temperature indication error | 0.2℃ |
| Salinity compensation range | (0-40) ‰ |
| Salinity compensation error | ≤±2% |
Instrument parameters
|
Instrument name |
Portable optical dissolved oxygen meter |
|
Instrument model |
LH-E2DO |
|
Measurement items |
Dissolved oxygen |
|
Electrode type |
High-precision digital detection electrode |
|
Screen size |
4.3-inch high-definition color LCD touch screen |
|
Power supply |
Built-in lithium battery and Type-C charging |
|
Electrode wire length |
5m, customizable according to user needs |
|
Data transmission |
USB transmission |
|
Battery capacity |
Built-in large-capacity lithium battery, 7000mA/h |
|
Data storage |
10,000 items |
|
Printing method |
Bluetooth printer is optional |
|
Instrument size |
（220*85*38）mm |
|
Instrument weight |
Main unit 478g |
|
Ambient temperature |
（0~40）℃ |
|
Ambient humidity |
Relative humidity ≤ 85%RH (without condensation) |
|
Accessory box |
Dedicated waterproof accessory case |
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