What is the color code for a heat detector rated at 250°F?

What is the color code for a heat detector rated at 250°F?

• A. Red
• B. Green
• C. Blue
• D. Yellow

Answer: (C)

Heat detectors use fixed-temperature ratings indicated by color on the device. This color coding lets you quickly identify the trip point. In the common color scheme, 135°F is red, 160°F is yellow, 200°F is green, and 250°F is blue. So blue marks a 250°F rating, meaning the detector will activate when the ambient temperature reaches that level. This helps ensure you select detectors appropriate for hotter environments and avoid nuisance alarms. Keep in mind some manufacturers may vary slightly, so always check the specific product data sheet.

Heat detectors use fixed-temperature ratings indicated by color on the device. This color coding lets you quickly identify the trip point. In the common color scheme, 135°F is red, 160°F is yellow, 200°F is green, and 250°F is blue. So blue marks a 250°F rating, meaning the detector will activate when the ambient temperature reaches that level. This helps ensure you select detectors appropriate for hotter environments and avoid nuisance alarms. Keep in mind some manufacturers may vary slightly, so always check the specific product data sheet.