tender for purchase of equipment , purchase of equipment: dual pump nanofiber electrospinning unit , 1. high voltage power supply • output: 0-40 kv, positive & negative polarity,• digital control with current limiting and safety interlock 2. syringe pump system • dual syringe pumps, upgradeable to triaxial (3) or four (4) syringe configuration • flow rate range: 0.001-20 ml/hr,• compatible syringe size: 1-60 ml 3. spinneret system • stainless steel needles (18g-30g) • capability for single, coaxial and triaxial electrospinning, • multi-needle spinning provision 4. collector system • interchangeable flat plate and rotating drum collectors (different sizes), • drum speed: 0-5000 rpm • adjustable tip-to-collector distance: 5-30 cm 5. environmental control chamber • fully enclosed electrospinning chamber, • temperature control: ambient-60 °c • humidity control: 20-80% rh 6. control & automation • touchscreen / pc-based operation, • programmable process parameters • real-time monitoring of voltage, flow rate, collector speed, temperature and humidity 7. digital interface & data handling • advanced digital interface for system control,• high data storage capacity for experimental records • data export through usb / ethernet 8. safety features,• fully grounded system • door interlock for high-voltage safety • emergency stop and overload protection 9. accessories & support • syringes, needles, grounding cables and collector substrates, • on-site installation and user training,• operation manual • warranty: minimum 2 year