Feature
- Stable optical system, gold-plated holographic fixed grating beam splitter, 256 diode array indium gallium arsenide detector (electrically constant temperature cooling), full spectrum instantaneous scanning
- Automatic wavelength calibration, using a xenon lamp as the calibration light source to achieve precise reference calibration of the entire wavelength band
- Suitable for detecting various solid (granular, powdered) and liquid (transparent or with suspended particles) materials
- Large spot area (diameter 10cm), more suitable for detecting uneven samples
- >30 times/second high-speed spectral data acquisition, fast measurement speed, high sensitivity
- Low instrument failure rate and self diagnostic function
- Basically no consumables, long service life of light source lamp（>12000 hours)
Advantage
Non contact detection：The instrument is not affected by the shape of the sample and has a large scanning spot area (spot diameter of 10cm), which is suitable for detecting uneven samples and can better overcome the influence of impurities and bubbles. Completely unaffected by the temperature and corrosion characteristics of the sample.
Easy installation and maintenance：The optical system adopts a multi-stage slit design, and the instrument adopts a fully enclosed design, which can effectively eliminate the influence of stray light and on-site environment. At the same time, positive pressure clean air is used to protect the lens, which requires almost no cleaning.
Mature application solution：A large number of mature calibration models have been developed for different products; Suitable for various forms of samples and production conditions, with minimal consumables, it can be detected using diffuse or diffuse reflectance methods. It is not only suitable for sample morphology, but also for products with different spectral characteristics.
Multiple data transmission methods：Support seamless connection with multiple control system data transmission, integrating continuously detected data into customer control systems.
Modern Instrument Design：Integrating the light source, optical system, spectroscopic system, computational processing system, and communication system into one probe can avoid signal loss caused by long fiber optic transmission, and achieve higher signal-to-noise ratio with low-power light sources. Network side user interface: The network version of the operating software and user interface can achieve multi-user access to the local area network.
System Integration and Communication
- Modbus TCP/RTU communication
- RS 235/485 communication
- Analog signal output
- OPC protocol
- Profibus DP
- Read. xml text interface
Technical Specifications
| category | Details |
| appearance | Host size: 95mm (H) × 461mm (W) × 210mm (D); Net weight of the host: 11 kg |
| power supply | Power supply for the whole machine: 115-230 VAC, 50-60 Hz; DA7440 sensor: 24V DC, 2A |
| Installation environment | Working temperature: 0 ° C -+40 ° C; relative humidity: 30-90%; Installation components: 38 mm diameter pipe; Installation distance to sample surface: 250 mm (allowable range of variation: 200-350mm) |
| Protection level | DA7440GP: IP65； DA7440SD: IP69K； Distribution box: IP65 |
| compressed air | Joint size: 6 mm (¼ "); Flow rate: 30-60 L/min; Pressure: Min 0.1Mpa, Max 0.4Mpa |
| optical properties | Wavelength range: 900-1700nm (usually 950-1650nm is used); Wavelength accuracy:<0.05 nm; wavelength stability:<0.2nm/year; Spectral system: gold-plated holographic fixed grating; Data/Spectral Acquisition Speed:>30 full spectra and measurements per second; Noise:<0.00003AU within a measurement time of 3 seconds; Reference benchmark: Automatic standard diffuse reflection reference plate; Light source lifespan: 12000 hours, user replaceable; Sample presentation method: non-contact; Effective area of light spot: diameter greater than 10 centimeters; Detector: electrically cooled 256 diode array indium gallium arsenide detector, internal linear wavelength reference |
| operating system | Operating platforms: Windows 7, Windows 10 Professional Edition, WinServer； Network connection: RJ45 LAN, software interface can be covered to the factory mobile end through WiFi |
DA7440 Online Near Infrared Solution in the Chemical Industry
In the field of chemical engineering, the application of DA7440 near-infrared online analyzer for testing the hydroxyl and acid values of polyols is relatively mature. These two indicators are key indicators for detecting the degree of process response and product quality. The traditional method of chemical titration is cumbersome to operate, has long analysis intervals, and has a certain degree of delay. The toxicity of the reagents used in the laboratory process is harmful to both humans and the environment.By using the DA7440 near-infrared online tester, the changes in acid value and hydroxyl value during the polyurethane reaction process can be detected in real time, which can shorten the production cycle to the greatest extent possible, expand product production scale, and help enterprises save energy and increase efficiency. In addition to acid value and hydroxyl value, online near-infrared spectroscopy can also test parameters such as moisture, color, viscosity, and other indicators that enterprises are concerned about.Product advantages and features
Non contact detection, large spot area, suitable for various complex chemical reaction scenarios
Chemical product reaction vessels often have strict requirements for temperature and pressure inside. DA7440 is a non-contact detection device that is not afraid of high temperatures, strong corrosion, and toxic products. The instrument itself is not affected by the physical and chemical properties of the product, greatly extending its service life.The scanning spot is large (spot diameter 10c), suitable for detecting uneven and suspended particle samples, which can better overcome the influence of impurities and bubbles, and more scientifically evaluate the overall content level of the product.The instrument is reliable, earthquake resistant, wavelength drift free, and stable in long-term operation
Adopting a gold-plated holographic fixed grating, with no moving parts in the optical part and electrically constant temperature cooling, it can eliminate the influence of environmental temperature, humidity, and on-site vibration. Basically no consumables, light source lamp lifespan（>10000 hours).
