Handheld chlorophyll analyzer

instrumentHandheld chlorophyll analyzerPurpose:

The chlorophyll analyzer can instantly measure the relative chlorophyll content of plants (in units)SPAD）Or the degree of greenery and leaf temperature, in order to understand the true nitrate demand of plants and the degree of soil nitrate deficiency or whether excessive nitrogen fertilizer has been applied. This instrument can increase the utilization rate of nitrogen fertilizer and protect the environment. It can be widely applied in agricultural and forestry related research institutions and universities to study plant physiological indicators and provide guidance for agricultural production.

　instrumentHandheld chlorophyll analyzerPrinciple:

Based on the absorption of visible spectrum by chloroplast pigment extraction solution, the absorbance of each pigment in the extraction solution can be calculated using a formula by measuring its absorbance at a specific wavelength with a spectrophotometer. According to Lambert—Bill's Law, the absorbance of a colored solutionAAnd the solute concentration within itCAnd the thickness of the liquid layerLProportional, i.eA=αCLWhere:alphaProportional constant. When the concentration of the solution is measured in percentage concentration, the thickness of the liquid layer is1cmWhen,alphaThe absorption coefficient of the substance. The absorbance coefficients of various colored substance solutions at different wavelengths can be obtained by measuring the absorbance of pure substances with known concentrations at different wavelengths. If there are several absorbing substances in the solution, the total absorbance of the mixture at a certain wavelength is equal to the sum of the absorbance of each component at the corresponding wavelength. This is the additivity of absorbance. I want to determine chlorophyll in the mixed extract of chloroplast pigments todayaThebTo determine the content of carotenoids, simply measure the absorbance of the extract at three specific wavelengthsAAnd according to chlorophyllaThebThe absorbance coefficient of carotenoids at this wavelength can be used to determine their concentration. Measuring chlorophyllaThebIn order to eliminate the interference of carotenoids, the wavelength of monochromatic light used was chosen to be the large absorption peak of chlorophyll in the red light region.

　Functional features:

Chlorophyll analyzerHM-YBIt can simultaneously measure two parameters, chlorophyll and leaf surface temperature, with upper computer software function and data export capability.

Fast and non-destructive live plant detection, without affecting plant growth.

One operation can simultaneously measure all parameters, display them in real-time, and store them simultaneously

Viewing historical data can be done in sequence or by jumping.

Measurement data can be connected to a computer to export measurement data for easy management and analysis.

Viewing historical data can be done in sequence or by jumping.

The data saved in the host after an unexpected power outage will not be lost.

For historical data, it can be deleted one by one or all with just one click.

Powered by lithium batteries with backlight function.

One click switching between Chinese and English.

Upper computer software functions（HM-YBType:

Each parameter's report and curve graph can be queried and viewed by selecting a time period.

Display the trend of each parameter process curve, display the large, small, and average values for viewing, and have zoom in and out functions.

The stored recorded data can be used toEXCELThe format is backed up and saved for future calls.

The data curve graph of stored records can be used toBMPThe image format is backed up and saved for future calls.

　　Technical Specifications:

　　1Measurement range: Chlorophyll:0.0-99.9SPAD

Leaf surface temperature:-10-99.9℃

　　2Measurement accuracy: Chlorophyll:±1.0 SPADWithin the unit(at room temperatureSPADValue between0-50)

Leaf surface temperature:±0.5℃

　　3Repeatability: Chlorophyll:±0.3 SPADWithin the unit(SPADValue between0-50)

Leaf surface temperature:±0.2℃

　　4Measurement area:2mm*2mm

　　5Measurement time interval: less than3Second

　　6Data storage capacity:32KB

　　7Power supply:4.2VRechargeable lithium battery

　　8Battery capacity:2000mah

　　9Weight:200g

　　10Work and storage environment:-10℃~50℃ ≤85%Relative humidity