Origin	China
Brand Name	Chaoda/OEM

Single-target coating collector tube
Standard: high quality
Diameter of the outer tube and length of the tube: Φ47/1500, Φ47/1800, Φ58/1800, Φ58/2000, Φ58/2100(mm)
Material of the glass: borosilicate 3.3 glass
Film-coating technology: patented interference technology
Material of coating:  AL/AL-ALN(H)/AL-ALN(L)/ALN
Absorptance:0.94~0.96
Emittance:0.04~0.06
Vacuum rate: 5*10-3pa
Bearing hailstone ability: hailstone diameter 25mm
Pressure-endure ability: 1MPa
Description:
All glass evacuated tubes are the key component of solar collectors. The evacuated tube is similar to a conventional Dewar flask and consists of two borosilicate glass tubes, a glass with high chemical and thermal shock resistance. The outer side of the inner tube is coated with a sputtered solar selective surface. This coated inner tube is closed at one end and sealed at the other end to the outer tube. The annular space between the outer tube and inner tube is evacuated to virtually eliminate heat loss by conduction and convection.

The characteristics:
1. High solar-thermal conversion and low heat loss
2. Stable advanced coating up to 380 degree centigrade
3. Long time warranty to 15 years
4. High level vacuum ensure operation under cold weather