The MTT MS3705HB is a slim plug-in digital alarm setter that watches a DC current or voltage signal and switches two independent, isolated relay outputs when the signal crosses a set point. It accepts a wide choice of current and voltage input ranges, and its trip point is shown on a bright 3-digit LED display and set in fine 0.1% steps on a front-accessible rotary switch, giving a precise, clearly readable alarm threshold rather than a plain dial with no feedback.
Selectable relay activation modes let the two outputs be configured to match how the alarm should behave relative to the set point and hysteresis band, and adjustable hysteresis prevents the relays from chattering when the signal sits near the trip point. Because the two relay outputs are isolated from the input, the power supply, and each other, the MS3705HB can drive two independent alarm circuits from a single measured signal. Like the rest of the plug-in transmitter range, it clips into its own socket base for fast calibration or replacement, and flexible AC or DC power plus wall or DIN rail mounting keep installation straightforward.
