| Model | Seido 5-8 | Seido 5-16 | | Design | Evacuated Tube with Heat Pipe | Evacuated Tube with Heat Pipe | | Dimensions (LxWxH) | 83.7 x 37.80 x 7.36 in 2126 x 960 x 187 mm | 83.7 x 75.59 x 7.36 in 2126 x 1920 x 187 mm | | Number of Tubes | 8 | 16 | | Vacuum Tube Glass Material | high quality borosilicate | high quality borosilicate | | Wall Thickness | 0.098 in, 2.5 mm
| 0.098 in, 2.5 mm
| | Tube Outside Diameter | 4 in, 100 mm
| 4 in, 100 mm | | Tube Length | 78.7 in, 2000 mm
| 78.7 in, 2000 mm
| | Tube Weight | 10.4 lbs, 4.7 kg
| 10.4 lbs, 4.7 kg | | Hailstone Resistant to | 1.38 in, 35 mm
| 1.38 in, 35 mm
| | Vacuum | <75-6 torr ( 10-5 mbar) | <75-6 torr ( 10-5 mbar) | | Collector Surface Area | 22 ft2, 2.0 m2
| 43.9 ft2, 4.1 m2
| | Absorber Surface Area | 19.7 ft2, 1.83 m2
| 39.4 ft2, 3.66 m2
| | Angle of Inclination | 30-90° | 30-90° | | Module Weight | 110 lbs, 50 kg
| 220 lbs, 100 kg
| | Pressure drop per module | <0.17 ft H20 (5 mbar) @ 0.44 gpm (100 L/h) | 0.40 ft H20 (12 mbar) @ 0.88 gpm (200 L/h) | | Test Pressure | 145 psi, 10 bar | 145 psi, 10 bar | | Operating Pressure | 87 psi, 6 bar | 87 psi, 6 bar | | Fluid Content | 0.13 gal, 0.48 L | 0.25 gal, 0.96 L
| | Absorber Material | Aluminum | Aluminum | | Selective Surface Coating | Aluminum Nitride | Aluminum Nitride | | Absorption Coefficient | > 92% | > 92% | | Emission Coefficient | < 8% | < 8% | | Typical Operating Temperature | 158-248°F (70-120°C) | 158-248°F (70-120°C) | Stagnation Temperature: Module Tube | 374°F (190°C) 477°F (247°C) | 374°F (190°C) 477°F (247°C) |
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