The chlorophyll meter determines the relative number of chlorophyll in the leaf by measuring the light transmission coefficient of the blade in two wavelength ranges, that is, in the two wavelength regions where chlorophyll selectively absorbs light of a specific wavelength, and calculates the measured value according to the amount of transmitted light of the blade. . It can be easily measured in the field. It is an instrument that can quickly measure the chlorophyll content, and its function is also excellent, but there are still some problems in the operation. Therefore, when using the chlorophyll meter for measurement, pay attention to the following 7 major items to ensure the measurement results. Accuracy:
1. Measuring area is only 2mm/SPAN>3mm, can be used to measure relatively small leaves, the sample thickness can reach 1.2mm. The center line indicates the center of the measurement area.
2. Hold the sample holder with your finger until a measurement that gives a “drop†appears on the display. The measured value is automatically stored in the memory.
3. When using the instrument directly under the sun, use the body to cover the instrument with sunlight so that it does not affect the measurement results.
4. Do not attempt to measure absolutely thick parts, such as veins. If the measured blade has many veins, the best way is to take several measurements and take the average.
5. If a series of "drip" sounds and "---" flash on the display, the measurement step is performed incorrectly (the sample holder is not completely sealed, the sample holder is opened before the measurement is completed, or the sample is too Thick or too small).
6. If the measured value has a decimal point flash, no decimal point or the measured value is greater than 50.0, the measurement accuracy is not guaranteed. Please re-measure.
7. If the launch or receiving window of the sample holder becomes dirty or has some water, there will be no accurate measurement results. Check that the sample holder window is clean before measuring.
Double Lumen Endobronchial Tube
Double Lumen PVC Endobronchial Tube with FDA&ISO Certificate
Made of non-toxic medical-grade PVC, transparent, soft and smooth.
Flat design of balloon section can seal effectively and reduce oppression.
With ventilation transition connector, unilateral ventilation can be more convenient.
Description:
A double-lumen Endotracheal tube is a type of endotracheal tube which is used in tracheal intubation during thoracic surgery and other medical conditions to achieve selective, one-sided ventilation of either the right or the left lung.
There are several conditions that may make one-sided lung ventilation necessary. Absolute indications include separation of the right from the left lung to avoid spillage of blood or pus from an infected or bleeding side to the unaffected side. Relative indications include the collapse of one lung and the selective ventilation of the remaining lung in order to facilitate exposure of the anatomical structures to be operated on in thoracic surgeries.
Construction:
Consist of PVC tube, cuff, inflation lumen.
Double Lumen Endobronchial Tube,Disposable Silicone Tube,Dlt Silicone,Pvc Double Lumen Endobronchail Cannula
Hangzhou Trifanz Medical Device Co., Ltd , https://www.cfzmed.com