Photosynthesis meter

1. Product Introduction:

The photosynthesis meter measures the amount of fixed CO2 per unit leaf area and per unit time, and simultaneously measures the inlet temperature and humidity, outlet temperature and humidity, leaf temperature, leaf chamber humidity, light intensity, and leaf area that assimilates CO2. It can directly calculate photosynthesis indicators such as plant photosynthesis rate, (respiration rate), transpiration rate, intercellular CO2 concentration and stomatal conductance, and instantaneous water utilization rate. The instrument has the advantages of high sensitivity, rapid response, strong anti-interference, easy operation, and can perform live and continuous measurements. Therefore, it is widely used in many fields such as plant physiology, plant biochemistry, ecological environment, and agricultural science.

2. Measurement method:

Open circuit and closed circuit measurement methods;

3. Measurement items:

Non-diffusive infrared CO2 analysis;

Photosynthetically active radiation intensity in leaf chamber (PARin) (optional);

Photosynthetically active radiation intensity in environment (PARout);

Leaf chamber temperature;

Leaf chamber humidity;

Leaf temperature;

Leaf chamber inlet humidity;

Leaf chamber outlet humidity;

Atmospheric pressure;

4. Analysis and calculation:

Leaf photosynthetic rate (Pn);

Leaf transpiration rate (Tr);

Intercellular CO2 concentration (Ci);

Stomatal conductance (Gs);

Water use efficiency (WUE);

Respiration rate measurement (Rd);

Soil carbon flux measurement can be added (soil respiration chamber needs to be configured);

5. Technical indicators:

CO2 analysis:

Dual-wavelength infrared carbon dioxide analyzer with temperature regulation, measurement range: 0-3000ppm, resolution: 0.1ppm; accuracy ±3ppm. Carbon dioxide measurement is not affected by temperature changes, and is stable, accurate, and sensitive. Carbon dioxide difference acquisition can be completed within 1 second*.

Leaf chamber temperature:

German Heraeus high-precision digital temperature sensor, measuring range: -20-80℃, resolution: 0.1℃, error ±0.2℃

Leaf temperature:

T-type thermocouple, measuring range: -20-60℃, resolution: 0.1℃, error ±0.2℃

Inlet humidity, outlet humidity, leaf chamber humidity Humidity sensor:

Swiss imported high-precision digital humidity sensor: measuring range 0-99%, resolution: 0.1%, error ≤1%

Photosynthetically active radiation (PAR):

Silicon photocell with correction filter

Measuring range: 0-3000μmol?m-2?s-1, accuracy <1μmol?m-2?s-1. Response wavelength range: 400～700nm

Flow measurement: micro electronic flowmeter, flow can be set arbitrarily within the range of 0.2-1.8L. Resolution: 0.0001L,

Zero drift: ±0.005L, the air pump flow rate can be set as needed, and the effect of different gas flow rates on photosynthesis can be measured, and the gas flow rate is stable.

Leaf chamber: The clamping force of the leaf chamber can be adjusted according to the thickness of the leaves, which can not only avoid damaging the leaves but also avoid air leakage. The upper leaf chamber is covered with a highly transparent, non-shrinkable film, which can also effectively insulate. If the film is punctured, torn or soiled by the leaves, it can be replaced at any time. Configurable tripod

Leaf chamber size:

Type I: (30×30mm)

Type II: (30×20mm) standard size

Type III: (30×10mm)

Other leaf chamber sizes can be customized

Pipeline system: The instrument uses a composite plastic hose with low stagnation and adsorption of water and CO2, which can maintain good performance even at high temperatures, and the inner wall is smooth. Compared with PVC or silicone tubes, this tube has good hydrophobicity.

Atmospheric pressure:

Range: 150～1150mbar

Resolution: 0.1mbar

Error: ±1.5%

Operating environment: temperature -20℃—60℃, relative humidity: 0-85% (no condensation)

Power supply: large-capacity DC8.4V rechargeable lithium battery, one charge can work continuously for 12 hours (without connecting external light source)

Data storage: 16G memory, expandable to 32G

Data transmission: USB connection to computer can directly export data

Display: 3.5" TFT true color LCD color display, resolution 800×480, clearly visible under strong light

Buttons: Six buttons, simple and convenient operation, can set and modify date, time, leaf area, system volume, measurement interval, number of data collection and test name, etc.

Volume: 260×260×130mm

Weight: 3.25kg for main unit

Other optional accessories:

Type II leaf chamber light source: optional LED red and blue light source, adjustable range 0-2500μmol?m-2?s-1. The light intensity value can be set by the instrument.

Soil respiration chamber: diameter 100mm, height 180mm. Other sizes can be customized;

GPS positioning: with GPS positioning function, can display the latitude and longitude of the measurement location in real time;

Product's Website：http://en.huoerd.com/ghzycdy/1867.html