Description:The TYS-B plant chlorophyll meter can measure the plant's relative chlorophyll content (unit SPAD) or "greenness level" so that you can know the plant's actual nitro requirement and help you understand whether the soil nitro deficiency level or whether nitrogen fertilizer is being applied too much.You can use this instrument to increase the utilization of nitrogen fertilizer and protect the environment (prevent environmental pollution, especially water pollution, by applying too much nitrogen fertilizer). Working Principle:Two LED light sources emit two kinds of light, one is red light (650nm), and the other is infrared light (940nm). Two kinds of light penetrate the blade and hit the receiver. The light signal is converted into an analog signal. The analog signal is amplified and converted into a digital signal by an analog/digital converter. The digital signal is processed by the microprocessor and the SPAD value is calculated and displayed on the LCD screen.Technical Datas:Measurement range: 0.0-100 SPADMeasurement area: 2mm*2mmMeasurement accuracy: within 1 SPAD units (0.0-50.0 SPAD under normal temperature and humidity).Repeatability within + 0.3 SPAD units (0.0-50.0 SPAD measurement position unchanged)Data storage medium: SD card storageData storage capacity: 2GBPower: 4.2V rechargeable lithium batteryBattery capacity: 800MAHWeight: 260gProduct Size: 140 x 85 x 45mmWorking and storage environment: 0 -50℃; 85% relative humidity
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