Alerton MS4-TH Digital Temperature and Humidity Sensor

Alerton MS4-TH is a wall-mounted digital temperature and humidity sensor in the Ascent Microset 4 family, engineered to provide zone-level environmental data to Alerton building management controllers. It combines a touchscreen display with an ARM Cortex‑M4 processor and BACnet networking options; the MS4-TH‑MSTP variant uses BACnet MS/TP for field bus communication, while other variants integrate with the network in similar ways. The unit is powered from a 24 VAC supply sourced from a standard Class 2 transformer, and it displays room temperature, relative humidity, and setpoint information locally to aid monitoring and commissioning. Available models include MS4-TH (temperature and humidity), MS4-TH-NL (no Alerton logo), and MS4-THC (temperature, humidity, and CO2), all designed for use with Alerton’s Ascent Microset 4 ecosystem to feed precise environmental data for HVAC control, energy management, and occupant comfort.