Used to measure:

• Water/solvent mixtures (ppm - 100%)
• Alcohol concentration (methanol, ethanol, other)
• Solvent Gradient Monitoring
• Solvent recovery
• Polymer reaction endpoint
• Caustic soda (NaOH) content in water
• Acid concentration (Sulfuric Acid, and others)
• Solutions of salts
• Sugar, molasses
• Metal ions
• Can be used in conjunction with other Kemtrak DCP007 models, providing a wider range of measurements

Benefits:

• Measurements are made in real time
• LED light source is used instead of traditional mercury light source: no heating of light filters, which leads to their short life span
• LED light sources do not require special handling compared to elements containing mercury
• Does not require spare parts, or simple replacement of the main components after a long period of operation.
• Does not require any consumables
• The dual-wavelength filter range covers compounds with an absorption of 850 - 2000 nm and allows measurement of Organic and Inorganic compounds and Elements in Liquid and Gaseous phase
• Measurement without bias and drift in results, with a coefficient of determination (R2) of 0.99
• Measurements up to 5 AU (1 cm OPL) allows deeper absorption measurements with shorter trajectories
• Temperature compensation and possible compensation for suspended particles
• Non-contact measurement of measured Samples: Light passes through fiber-optic reinforced cables to the measuring cells, preventing the flowing samples from being exposed to either electromagnetic or temperature effects
• Analog output (0/4-20 mA)
• Modbus (slave) connections via TCP/IP and Profibus (optional)
• Local & web user interface (TCP/IP)
• Enclosure explosion protection: ATEX Exd IIB + H2 T6 IP66 Category II 2 G (If required)
• Easy to handle and install

Comparison with other Measurement Methods

The Kemtrak DCP007-NIR analyzer is the only linear industrial flow-through photometric analyzer that can measure concentrations of various components in concentrations from 0 to 100% by weight. Other technologies require complex calibration and verification procedures and have limited measurement ranges, (or have ranges where measurement is not possible), and provide non-linear resolution and response curves that are inverted. The Kemtrak DCP007-NIR analyzer ensures the safety of the measurement process by never giving the same measurement value for different concentrations.

An example of measuring Sulfuric Acid concentrations using the Kemtrak DCP007-NIR analyzer is shown below.

• Model DCP007-NIRL: 850 - 1550 nm
• Model DCP007-NIRH: 850 - 2000 nm

Light Source
High performance NIR (NIR) emitting light-emitting diode (LED) with InGaAs system
2-stage Thermoelectric Peltier converter photodiode (NIRH)
Full-width half-maximum (FWHM): 15 nm
Mean Wavelength Accuracy (CWL): ± 1 nm
Typical lamp life: >20,000 hours

Note:

• Measuring wavelengths should be set at the factory
• Typical specifications for 1440 nm light source

1 AU, 25 °C: 0,001 AU
2 AU, 25 °C: 0,001 AU
3 AU, 25 °C: 0,01 AU
4 AU, 25 °C: 0,1 AU


Photometric noise

At:

1 AU, 850 - 1550 нм: 0,0001 AU
2 AU, 850 - 1550 нм: 0,001 AU
З АС, 850 - 1550 нм: 0,01 AU
4 AU, 850 - 1550 нм: 0,1 AU


At:

1 AU, 1550 - 2000 nm: 0.0005 AU
2 AU, 1 550 - 2 000 nm: 0.005 AU
3 AU, 1550 - 2000 nm: 0.05 AU
4 AU, 1550 - 2000 nm: 0.5 AU


Linearity
± 0.5 % of the respective measuring range (is specific for certain measurements)

Operating conditions (temperature):
Model DCP007-NIRL: 0 °C to +50 °C
Model DCP007-NIRH: 10 °C to +50 °C