ELK-M1ZTS M1 Zone Temperature Interface with Sensor Monitor high or low temperatures with this add-on remote sensor. Connects to any main zone on the M1 Gold (1-16) or M1EZ8 (1-8). Range is -50 to +140F. Applications include: freeze monitoring, second homes, agricultural uses, etc. Temperature may be accessed from keypad, telephone remote control, or rules. Sensor is locally plugged into the interface.