NB326-H-2 Conventional Rate of Rise Heat Dedector, based on advanced thermistor technology, the NB326-H-2 provides a reliable response to heat in areas where environmental conditions prohibit the use of smoke detection.  

Features：

● 2 or 4 wire models ● Dual LEDs for 360°visibility ● Advanced detection and discrimination algorithms ● Easy installation and maintenance ● Sleek low-profile housing design ● Durable sensor head, no need for replacement ● SMD circuit board design-satisfactory quality and reliability guaranteed ● Integrated heat detector for NB326-H-2 and NB326-H-4 models ● Five-year limited warranty ● N/C (normal/close)-N/O (normal/open)selectable relay output ● AR (Auto Reset) function for security systems (optional for 4 wire models) ● Sensor base option: standard and Shottky Diode