When aiming a flame detector, which device may be required to ensure accurate aiming?

• A. Angle finder
• B. Protractor
• C. Compass
• D. Seismograph

Answer: (A)

When you aim a flame detector, the key is aligning its sensing axis so it covers the intended flame area precisely. An angle finder is the right tool because it measures the tilt or elevation of the detector mount, letting you set the exact vertical angle (and, if the device supports it, the horizontal angle as well). This precise angular measurement ensures the detector’s field of view lines up with where flames would appear, which is essential for reliable detection.

A protractor can measure angles but isn’t practical for mounting hardware in the field. A compass tells direction relative to magnetic north, not the specific vertical angle needed to aim the detector. A seismograph measures ground vibrations and has no role in aiming optical flame sensors.