... -- ROR, Fixed Temperature HEIMAN Fire Alarm Products4 Wire Conventional Heat Detector --- HM-203HC-4Power Supply Non-Polar Input Low Standby Current ... 5A@DC28VDimensionΦ100 * 46mmAdvantage of our factory and services:1) ISO certified factory since 2005. 8 years professional experience and alibity ... on material, testing, quality, leadtime etc. Fire Alarm Heat Detector (Rate-Of-Rise, Fixed Temperature)