UVN immersion on-line nitrate and nitrogen analyzer
In the fields of drinking water / surface water / industrial production process water / sewage treatment, it continuously monitors the concentration of nitrate dissolved in water, which is particularly suitable for monitoring the aeration tank of sewage and controlling the denitrification process.
NO3- in water can absorb 210nm ultraviolet light. Therefore, by measuring the absorption of 210nm UV light by water samples, we can evaluate the NO3-N concentration in water. When the sensor works, the light from the light source passes through the sample and reaches the detector on the other side of the sensor. The concentration of nitrate can be calculated based on the change in light intensity.
● Internationally used high-accuracy ultraviolet light absorption method;
● No sample pretreatment is required, and the reaction analysis speed is fast;
● No reagents required, no secondary pollution;
● The sensor has a self-cleaning function, which is basically maintenance-free;
● Reduction of reagent and maintenance costs, and extremely low operating costs.
Measuring performance range: 0.1 ~ 100.0mg / L NO3-N (1mm optical path) 0.1 ~ 25.0mg / L NO3-N (5mm optical path)
Unit of measurement: mg / L
Resolution: 0.1mg / L
Accuracy: ± 5% FS (depending on media and homogeneity)
Repeatability: ± 2% FS
Response time: less than 1 minute, adjustable calibration: factory calibration, on-site calibration display: LCD display date, time, measured value, historical trend line, etc. Chinese and English operation menu optional data storage: automatic storage function, power-off data Protection, 10-year historical data can be stored and queried. On-site setting: completed by the transmitter button
Output analog output: 1 isolated 0/4 ~ 20mA, maximum load 750Ω, fault current output current optional relay output: 3 programmable relays, which can be set as alarm function and timing function Relay capacity: 2A, 250VAC
Digital interface: MODBUS RS232 / RS485, Profibus DP optional
AC power supply: 85 ~ 265VAC, 50Hz / 60Hz
DC power supply: 24VDC ± 10%
Physical performance transmitter size: 270 × 205 × 100mm
Sensor size: Φ65 × 316mm
Material: Transmitter: ABS + PC Sensor: 316L stainless steel Connection: 1 inch conical external thread or horizontal mounting bracket (3/4 inch internal thread)
Environmental Performance Protection Level: Transmitter: IP65 Sensor: IP68
Working temperature: Transmitter: -20 ℃ ~ 60 ℃ Sensor: 0 ℃ ~ 40 ℃ (no freezing)
Working pressure: 5Bar