YKM-N4 four parameter water quality analyzer Features：
1.7-inch color display, user-friendly menu design, direct display of sample concentration, absorbance, wavelength, curve, spectrum, time, etc., so that users can complete all measurements without using a computer.
2. Support U disk storage, convenient for users to use. The user's test data can be directly exported to U disk, support excel, txt picture format, it is convenient for users to edit the experiment report directly on the PC, and it is convenient for users.
3. Abundant expansion performance is greatly convenient for customers. The instrument is equipped with 8GB memory as standard, which can store a large amount of data. The instrument is equipped with RS-232C serial port (printing), USB drive (online), and USB HOST (connected to a U disk).
4. The imported long-life socket-type deuterium lamp and tungsten lamp can automatically switch the wavelength and light source according to the measurement needs, and automatically record the use time of the lamp source. The socket-type lamp source makes the replacement operation easy. Technical Parameters：
Instrument name: Four-parameter water quality analyzer YKN-M4
Display: 7-inch 1024 × 600 color LCD screen
Optical system: single beam, CT ratio dual beam detection
Test items: COD, ammonia nitrogen, total phosphorus, total nitrogen
scope of test:
COD: high range 15-5000mg / L low range 5-160mg / L
Ammonia nitrogen: 0.01-100mg / L
Total phosphorus: 0.002-20mg / L
Total nitrogen: 0.01-80mg / L
Resistance to chlorine interference: [Cl-] ﹤ 1000mg / L has no effect [Cl-] ﹤ 8000mg / L (optional)
Detection accuracy: ≤ ± 5%
Repeatability: ≤ ± 2%
Measurement time: 10 minutes-20 minutes
Parameter switching method: automatic switching
Colorimetric method: cuvette
Working curve: 500 working curves can be stored, supporting three modes of segmented curve, single point curve, customer-built curve
Stability: ± 0.001A / 10min
Data storage: 5 million sets of test data can be stored, and can be freely called for viewing
Data transmission: RS-232C serial port (printing), USB drive (online), USB HOST (connecting to U disk), Bluetooth (optional)
Printing method (optional): thermal printer, dot matrix printer (no discoloration, permanent data saving)
Light source: imported deuterium lamp, tungsten lamp, the light source has longer life span
Colorimetric cell: Standard quadruple colorimetric cell (optional other colorimetric cell)
Features：
1.7-inch color display, user-friendly menu design, direct display of sample concentration, absorbance, wavelength, curve, spectrum, time, etc., so that users can complete all measurements without using a computer.
2. Support U disk storage, convenient for users to use. The user's test data can be directly exported to U disk, support excel, txt picture format, it is convenient for users to edit the experiment report directly on the PC, and it is convenient for users.
3. Abundant expansion performance is greatly convenient for customers. The instrument is equipped with 8GB memory as standard, which can store a large amount of data. The instrument is equipped with RS-232C serial port (printing), USB drive (online), and USB HOST (connected to a U disk).
4. The imported long-life socket-type deuterium lamp and tungsten lamp can automatically switch the wavelength and light source according to the measurement needs, and automatically record the use time of the lamp source. The socket-type lamp source makes the replacement operation easy.
