{"product_id":"mircom-mhd-65-135-same-day-shipping-sealed","title":"Mircom MHD-65-135 Series 65 Plug In Heat Detector","description":"\u003cp\u003eThe MIR-65 Series incorporate proven sensing technologies, together with advances in materials and electronics technology. Having a wide operating voltage of 9-33VDC, the MIR-65 Series detectors can be integrated into most Fire\/Security systems. The MIR-65 Series wide voltage range family consists of photoelectric smoke, ionization smoke, and heat detectors. The heat detector operates by using a matched pair of thermistors to sense heat. One thermistor is exposed to the ambient temperature, the other is sealed. In normal conditions the two thermistors register similar temperatures; but, on the development of a fi re, the temperature recorded by the exposed thermistor will increase rapidly, resulting in an imbalance that causes the detector to change into the alarm state. Rate-of-rise detectors are designed to detect a fi re as the temperature increases, but they also have a fixed upper limit at which the detector will go into alarm if the rate of temperature increase has been too slow to trigger the detector earlier. A highly visible external red LED flashes when the detector is in operational standby and changes to steady in alarm state.\u003c\/p\u003e","brand":"FIRE ALARM SYS","offers":[{"title":"Default Title","offer_id":51574831251776,"sku":"395190251401","price":37.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/6466\/0032\/files\/MHD-65-135.webp?v=1775485577","url":"https:\/\/firealarmsys.com\/products\/mircom-mhd-65-135-same-day-shipping-sealed","provider":"FIRE ALARM SYS","version":"1.0","type":"link"}