1. Choose resistant varieties. 2. Scientific and rational fertilization. Add organic fertilizer, control the amount of nitrogen fertilizer, improve soil traits, and promote robust growth of plants. 3. Strengthen the management of fertilizer and water. Water should be poured before sowing, and small water should be poured in the seedling stage. The lotus seed stage and the ball stage should be topdressed separately to avoid concentrated fertilization. After pouring water, it is necessary to cultivate the loose soil in time. 4, pay attention to the choice of mouthwash. When planting Chinese cabbage, try to avoid cropping with crops such as cabbage and tomato that require a large amount of calcium. 5, timely supplementation of calcium nutrition. Foliar application of calcium fertilizer can promote the growth and quality of Chinese cabbage. During the rosette period of Chinese cabbage, spray the mixture of 0.7% calcium chloride and 50ppm naphthalene acetic acid or 50% of 1% calcium superphosphate solution to the heart leaves every 7-10 days. Spray continuously for 3 to 5 times. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Industrial Laser Distance Sensor
Industrial
Laser Distance Sensor, we also call it secondary development laser distance
module, which support TTL level and CMOS. The laser range sensor can be widely
used in professional surveying, mapping, construction, robots, hunting arrows,
industrial monitoring and automated measurement applications in electricity,
transportation, etc. Our laser distance module supports data communication with
RS232, USB with a simple adapter. The results of laser distance sensor can be
evaluated with Arduino. We are always looking ahead, hoping we can make every
measurement simple in life!
Parameters
of M703A:
Accuracy
±1
mm (0.04 inch)
Measuring
Unit
mm
Measuring
Range (without Reflection)
0.03-60m(150m can customize)
Measuring
Time
0.125~3
seconds
Laser
Class
Class
II
Laser
Type
620-690nm,
<1mW
Size
45*25*12mm (±1 mm)
Weight
About 10g
Voltage
DC2.0~3.3V
Electrical
Level
TTL/CMOS
Frequency
8Hz(20Hz can customize)
Operating
Temperature
0-40 ℃ (32-104 ℉ )
Storage
Temperature
-25~60 ℃ (-13~140 ℉)
Laser Distance RS232,Arduino Distance Module,Laser Module RS232 Chengdu JRT Meter Technology Co., Ltd , http://www.rangesensors.com