Application of tiny gas pump in plant photosynthesis measuring instrument
Background:
Photosynthesis, the process in which green plants use the sun’s light energy to assimilate carbon dioxide (CO2) and water (H2O) to create organic matter and release oxygen, is an important mechanism for plants to exchange nutrients. In modern agricultural scientific research, plant photosynthesis meters are used to detect the photosynthesis of plants, which helps to study the growth and physiological characteristics of plants, and is an important basic condition for high yield and high quality of agricultural crops.
Principle of photosynthesis meter:
Plant photosynthesis is the synthesis of organic matter by plants using carbon dioxide in the air and water absorbed by plant roots, using energy provided by sunlight and the chloroplasts of leaves. The faster the rate of photosynthesis, the better the growth of the plant. Therefore, the rate of photosynthesis has become an important basis for judging the growth of the plant. So how to measure the rate of photosynthesis?
There are many methods to measure photosynthetic rate, but the most commonly used method is to measure photosynthetic rate based on the absorption of CO2.The CO2 absorption method has been widely used because of its theoretical reliability, high sensitivity, and real-time non-destructive measurement of samples. The modern portable plant photosynthetic meter integrates a notebook computer and a gas analyzer. It uses the powerful computing and storage functions of a computer combined with non-diffusion infrared CO2 analysis, temperature and humidity sensors and light sensors to measure photosynthesis, respiration, transpiration, etc. of plants. Indicators are measured and calculated.
Application analysis of tiny gas pump in measuring instrument:
- The role of the tiny gas pump in the photosynthesis meter is to collect the gas around the plants, and then the photosynthesis meter further analyzes and calculates the photosynthetic rate through changes in CO2 concentration, temperature and humidity.
- The stable air flow of the tiny gas pump is an important condition for ensuring the accuracy of the measuring instrument. Most portable measuring instruments are powered by lithium batteries, and one of the characteristics of batteries is that during the discharge process, the battery voltage will gradually decrease as the capacity decreases. In this case, the micro pump motor speed and torque will also decrease as the voltage decreases, which will cause changes in the pump’s flow rate and load capacity. In this usage scenario that requires constant flow, we need to add a voltage stabilizing circuit to the power supply circuit, or choose a micropump with a built-in voltage stabilizing circuit.
- In addition, the tolerance of tiny gas pumps to complex media is also crucial. For example. During the collection process of the photosynthesis meter in the field, complex media such as high humidity will inevitably appear.
Product recommendations:
D15L tiny gas pump
Brief description: DC brushless motor, mainly made of reinforced nylon and EPDM rubber, power supply range: DC2~5V,12V, PWM speed regulation, relative vacuum degree -40kpa or more, maximum output pressure 40kpa Above, the test flow rate of the glass rotor flowmeter: greater than 1.8L/min, the test flow rate of the soap film flowmeter: greater than 1.2L/min.
Advantages: long life (the quality version has a continuous working life of more than 8,000 hours at full load),, stable output flow, compact size, and compatible with corrosive and complex medium,low temperature operation..
C09 tiny gas pump
Brief description: DC brushless motor, mainly made of reinforced nylon and EPDM rubber, three-chamber tiny gas pump, power supply voltage: DC24v, multiple speed control types (PWM, frequency and knob speed control type), relative vacuum degree about -37kpa, Glass rotameters measure flow: above 1.5-2L/min, test flow rate of soap film flowmeter: above 1.3-2L/min. The inlet can carry a large load, but the outlet must be unobstructed.
Advantages: long life (the continuous working life of the quality version can reach more than 5500 hours), three-chamber tiny gas pump, stable output flow, multi-functional speed regulation, compact size, and compatible with corrosive and complex medium.