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Elektrokit
location Shankar Nagar, Nagpur, Maharashtra

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Our Products

  1. Signs 9 Products available
  2. Security Alarms & Devices 8 Products available
  3. Electric Circuit Components & Parts 8 Products available
  4. Clocks 5 Products available
  5. Sensors 5 Products available
  6. Moving Message Display 4 Products available
  7. Electronic Development Boards 4 Products available
  8. Testing Equipment 4 Products available
  9. Relays & Contactors 3 Products available
  10. Modems 3 Products available
  11. Electronic Components 3 Products available
  12. DC Motor 2 Products available
  13. Gates 2 Products available
  14. Measuring Instruments & Equipment 2 Products available
  15. Emergency Lights 2 Products available
  16. Outdoor Speaker 2 Products available
  17. Computer Monitor 2 Products available
  18. Spying & Intelligence Devices 2 Products available
  19. LED Displays 2 Products available
  20. Puzzles & Educational Games 2 Products available
  21. Electronic Detectors 1 Products available
  22. Batteries 1 Products available
  23. Integrated Circuit 1 Products available
  24. Modular Switches 1 Products available
  25. Timer Switch 1 Products available
  26. Road Safety & Traffic Products 1 Products available
  27. Locks And Safes 1 Products available
  28. Gamepad 1 Products available
  29. Baby Toys 1 Products available
  30. Watches And Clocks 1 Products available
  31. Display Stands & Fixtures 1 Products available
  32. Mobile Charger 1 Products available
  33. Access Control System 1 Products available
  34. Inverters 1 Products available
  35. Process Control Systems & Equipment 1 Products available
  36. Door & Window Fittings 1 Products available
  37. Lamps 1 Products available
  38. Display Accessories 1 Products available
  39. Generators 1 Products available
  40. Electric Motors & Components 1 Products available
  41. LED, LCD, Smart TV & Home Theatre 1 Products available
  42. Boats 1 Products available
  43. Instrumentation & Control Equipment 1 Products available
  44. Metal Detector 1 Products available
  45. Presentation Boards, Equipment & Accessories 1 Products available
  46. Laser Instruments 1 Products available
  47. Fire Alarm System 1 Products available
  48. Security, Metal & Leak Detectors 1 Products available
  49. Wireless CCTV Camera 1 Products available
  50. Kids Toys 1 Products available
  51. Power Supply System 1 Products available
  52. Battery Accessories 1 Products available
  53. High Voltage Fuse 1 Products available
  54. Audio Recorders, Mixers & Transmitters 1 Products available
  55. Temperature Switches 1 Products available
  56. Telecommunication Equipment & System 1 Products available
  57. Motor Controllers 1 Products available
  58. Audio Systems 1 Products available
  59. Adapter 1 Products available
  60. Others Products 85 Products available

Fire Alarm System

Our product range contains a wide range of Fire Detection System

fire detection system

Fire Detection System
  • Size 3 Inch, 3/4 Inch
  • Number Of Flower Fire Detection System
  • Material Aluminium
  • Application Colleges, Hotels, Malls, Offices
  • Availability 100-200gm, 200-300gm, 300-400gm
  • Finishing Polished

Fire Detection System raises an alarm when temperature increases due to fire. Fire alarm circuit is used to sense the fire as well as temperature. Here reverse bias Germanium (GE) diode is used as a heat sensor. At temperature about 60oC and above, reverse resistance of GE diode drops and makes pin4 (reset) of IC 555 at logic high level. Hence IC generates output pulse and raises the alarm. It has household as well as industrial applications.

Circuit operation :

  • At room temperature reverse resistance of diode D1 (the sensor) being very high (over 10KW) it produces no effects on transistor T1 that conducts and keeps the reset pin4 of IC555 at ground level, so the alarm does not sound.
  • When temperature in the vicinity of diode D1 increases in case of a fire the reverse resistance drops to a value below 1KW. This stops T1 conduction and reset pin 4 becomes positive through resistor R2. Hence it gives output pulses, which sounds the alarm. Alarm can be heard from 8W speaker.
  • For installation of alarm two or three reverse biased Ge diodes connected in parallel can be kept at different locations. In case of a fire, any of the diodes can sense the heat and raise the alarm. Here diode D2 is used as a rectifier diode. Capacitor C4 is used as a filter capacitor, C3 as a coupling capacitor.
  • Calibration : VR1 is a preset used for temperature sensitivity.
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