Method for identifying the quality of fish fry
1. In the hatching tank, the water body is stirred into a swirl, and the fry can march against the water at the edge of the swirl to be a good seedling.
2. Take a small amount of fry into the dish, the fry lively and lively, the body is clean, the mouth blows the water surface, and the fry can swim against the water. After the water is drained, the fry is left to struggle at the bottom of the pan, and the head and tail are bent to form a circle.
Raising fish fry points
After the “test water†was released, the fish fry on the day before stocking was taken and several fish fry were placed in the fish cage to observe the day. If the fish activity is normal, the seedlings can be planted.
Fertility pond ponds Zooplankton (rotifers) are in the peak of breeding season. After the fry pool, there are plenty of natural foods that can increase the survival rate of fry. Normally, organic fertilizer is applied at a rate of 200-300 kg per 667 square meters of water. After the fish pond is fertilized for 6 days to 7 days, rotifer breeding reaches a peak period. At this time, fry can be used as a pond. If the water temperature is low, the pool can be postponed for 2 days to 3 days.
Before feeding the pond under the pond, put the fry into a slightly larger plastic basin. Take 2-3 egg yolks per 10,000 fry. Dilute the yolk smashed with water and filter it through a 40 mesh polyethylene net cloth. In the basin, you can put it in the pool after 20 minutes.
IT02S, is JRT new product in the early 2019, which is a single-point LiDAR sensor, also called tof distance sensor. With a micro size of 46x17x7mm, customers can widely use in many Laser Measurement Solutions. The lidar distance sensor can measure 12m short-range with high frequency up to 100hz. It's great for Unmanned Aerial Systems. If you need us send you data sheet and spec for this products, offering sample as well, pls tell us, thank you.
Accuracy
+/-8cm@ 0.1~3.5m
Measuring Unit
cm
Measuring Range (without Reflection)
0.1-12m
Measuring Time
0.1~3 seconds
Measuring Frequency
100 Hz
Laser Class
Class II
Laser Type
650nm, <1mw, red
Weight
About 5g
Voltage
DC2.5V~+3.5V
Serial Level
TTL 3.3V
Size
46*17*7mm
Operating Temperature
0-40 ℃ (32-104 ℉ )
Storage Temperature
-25~60 ℃ (-13~140 ℉)
IT02S Mini Tof Sensor Module Diagram
Parameters of IT02S:
IT02S – the High performance-price ratio measurement solution
* low power consumption of single transmit and single receive
* small size: 46*17*7mm
* low cost
* proffessional techinical support
2D Laser Distance Sensor,2D Lidar Sensors,Tof Lidar Distance Sensor, Flight Distance Sensor
Chengdu JRT Meter Technology Co., Ltd , https://www.irdistancesensor.com