What does the diameter of glass bulbs in sprinklers range from for different response types?

The diameter of glass bulbs in sprinklers is crucial in determining the response time and effectiveness of the sprinkler system during a fire event. Glass bulbs act as the mechanism that activates the sprinkler: when the bulb breaks due to heat, the water is released to combat the fire.

For different response types, the appropriate range for glass bulb diameters is typically recognized as 3 mm to 5 mm. This size allows for effective activation under varying temperature conditions, ensuring that the system operates reliably.

In contrast, smaller diameters would not provide adequate responsiveness, while larger ones would delay activation, reducing the efficacy of the sprinkler system in emergency situations. Therefore, a diameter range of 3 mm to 5 mm perfectly balances sensitivity and reliability, making it the correct choice in the context of sprinkler design and fire safety regulations.