HTRI-D Supervised Dual Input Module

HTRI-D Supervised Dual Input Module. The Model HTRI-D | -DZ is a dual-input module that is designed to supervise and monitor two (2) sets of dry contacts. Model HTRI-D | -DZ only requires one (1) address, but responds independently to each input. Model HTRI-D | -DZ is ideal for monitoring a waterflow switch and its respective valve tamper switch.