Lower temperatures can cause condensation to form on detector lenses and reflective prisms, which in turn obscures the lens and prism, reducing the amount of infrared (IR) light reaching the detector. This has a similar effect to smoke and can lead to unwanted false alarms. To combat this issue, Fire Fighting Enterprises (FFE) has developed a new range of anti-condensation heaters for its Fireray range of optical beam smoke detectors and reflective prisms. The detector heater circulates a current of warm air over the lens, raising its ambient temperature by up to 10℃ and maintaining the lens at an incrementally higher temperature than the surrounding air. This dramatically reduces the likelihood of condensation forming on the lens which then reduces the potential for false alarms.
展开▼
