Eppendorf STF3 tube sealer 5720310020

The Eppendorf STF3 tube sealer 5720310020 is a precision laboratory instrument designed for reliably sealing resin tubes containing liquid samples to ensure sample integrity during ultracentrifugation.

Key Features:

• Sealing system: Direct welding by molding heater
• Power requirements: 110-120 V equipment: 99~132 V AC, 2 A, 50/60 Hz; 200-240 V equipment: 180~264 V AC, 2 A, 50/60 Hz
• Dimensions: 132 (W) x 255 (D) x 260 (H) mm; height 320 mm when handle raised
• Weight: 8 kg
• Tube welding parameters: heating contact 1-2 seconds then approx. 40 seconds cooling until heat lamp goes out
• Welded part height specifications for various resin tube sizes (e.g. 1.5PA seal tube L=27.7~28.5 mm, 2PA seal tube L=34.5~35.3 mm, others with typical dimension l=5~6 mm)
• Ambient operating temperature: 6°C to 32°C; performance temperature: 15°C to 25°C
• Installation: requires level surface, no direct sunlight, no heat or water exposure
• Power cord: grounded 3-prong plug required

Advantages:

• Direct welding ensures robust and consistent sealing to prevent sample leakage during centrifugation
• Wide power input range allows versatile use in different electrical environments
• Compact size and moderate weight facilitate bench-top laboratory use without excessive space or support requirements
• Precisely controlled heating time optimizes seal strength and sample integrity
• Clear welded part height guidelines improve reproducibility and quality control in sealing
• Suitable operating temperature range maintains sealing performance in standard lab conditions
• Grounded power cord design enhances user safety during operation