Toll Free: 800-830-5186


Designed for Military Use

You are here:


Rugged Networked Thermostat

The NT-550MIL is an advanced Energy Controller which represents the culmination of customer feedback and committed research and development. We have developed a rugged, networked thermostat that is ready for deployment in the harshest marine operating environments.


THE NT-550MIL connects with a Cat-5 Ethernet cable for traditional installation. It is enclosed in a MIL-SPEC aluminum housing and meets military standards for shock, vibration, and electromagnetic interference.


Additionally, the NT-550MIL supports three external wired sensors which can be used to sense temperature or dry contact closures from external equipment.  Each of these sensors can provide independent alarms via email or text message notification when pre-set threshold conditions are exceeded.  Two independently scheduled auxiliary relays are also supported to enable customers to control additional equipment.





  • Rugged MIL-SPEC aluminum housing
  • Dual stage, compatible with fossil fuel and heat pump
    (w/aux heat) systems
  • Adjustable setpoint deadband
  • Passcode protected keypad lockout
  • 4 Temperature periods per day
  • 12 Daily schedule profiles
  • 366 day programming
  • Five year scheduling
  • Vacation and special day schedules
  • Humidity sensing with AC and external humidification/dehumidification control
  • 3 Sensor inputs (temp./ contact closure)
  • 2 Auxiliary relays
  • Independent sensor alarms
  • Fan scheduling
  • Auto changeover
  • Reliable TCP/IP communications
  • Web Browser control interface
  • Automated Email & text message reporting
  • MIL-STD certified for Shock, Vibration & EMI

Spec Sheet - CALL




Contact Us

Phone: 800-830-5186

Fax: 757-852-9007



Find us

Copyright © NAG Marine 2017. All rights reserved.

Terms & Conditions

ISO Certification

Toll Free: 800-830-5186