Leek harvesting, processing, storage and transportation

Leek, commonly known as water chestnut or nursery grass, is a leafy vegetable belonging to the amaranth family. It is an annual herb with green leaves and tender stems, typically consumed fresh. Once a wild plant in China, leeks can now be found growing in both southern and northern regions. Today, they are cultivated in the suburbs of major cities like Shanghai, Beijing, Nanjing, and Guangzhou. There are two main types of amaranth: leaf type and mosaic type. Amaranthus tuberosus is known for its strong hardiness and heat resistance, offering high-quality produce. However, it tends to flower earlier, making it unsuitable for spring sowing. In contrast, the mosaic variety flowers about 15 days later than Amaranthus amarus, allowing for a longer harvesting period. This makes it more suitable for cultivation in both spring and autumn. Seeds are usually sown in the fall, and harvests can begin in mid-September and continue through late March. In spring, sowing takes place earlier, with harvests starting from early April to mid-June. The timing of planting plays a crucial role in determining yield and quality. Harvesting leeks at the right time is essential for maximizing production. When the plant has developed 10 to 13 true leaves, it's ready for harvest. When picking, it's best to select a mix of large and small plants while ensuring even distribution in the field. For early autumn planting, the first harvest can occur 30 to 35 days after sowing, with a total of 4 to 5 harvests over a few weeks. If sown in early October, the harvest period lasts 40 to 60 days, allowing for two additional harvests. Spring-sown leeks, however, are only harvested once or twice, with lower yields compared to other seasons. Storage of amaranth is similar to other leafy greens—fresh and perishable, not ideal for long-distance transport. It should be sold fresh whenever possible. For short-term storage or local transportation, it should be kept in a cool, well-ventilated area with a temperature around 0°C and humidity above 95%. Due to its delicate nature, it is often packed in baskets or food-grade plastic bags to maintain freshness and prevent damage during handling.

Micro Laser Distance Sensor

New product of U85 micro laser distance sensors use highly focused class 2 laser to detect objects or measure distances, and can return a measured value via varieties intface( serial, usb, rs232, rs485, bluetooth etc.). The electronic distance sensor is a very small Laser Distance Sensor, but high resolution up to 1mm and long distance measuring sensor - teachable measuring range of up to 30m. Extremely accurate distance sensing sensors, errors down to ± 1mm. And the mini sensors and measurements support continuous measurement function, great for compact solutions(eg: robots) with the smallest Laser Distance Sensor of the world!

Parameters of U85:

Accuracy	±1 mm (0.04 inch)
Measuring Unit	mm
Measuring Range (without Reflection)	0.03-20m/0.03-30m
Measuring Time	0.1~3 seconds
Laser Class	Class II
Laser Type	620nm-690nm, <1mW
Size	41*17*7mm (±1 mm)
Weight	About 4g
Voltage	DC2.0~3V
Electrical Level	TTL/CMOS
Certifications	CTNT, FDA, CE, FCC, RoHS, etc.
Operating Temperature	0-40 ℃ (32-104 ℉ )
Storage Temperature	-25~60 ℃ (-13~140 ℉)

Mini Laser Distance Sensor,Optical Laser Distance Sensor,Smallest Laser Range Sonsor,Laser Measuring Sensor

Chengdu JRT Meter Technology Co., Ltd , https://www.jrt-measure.com