Trust in SENTRY-PRO to continuously guard your property.  When normal power fails, SENTRY-PRO automatically starts up and supplies your critical electric power.  Your furnace keeps on working, guarding against frozen water pipes; your refrigerator keeps on working, guarding against spoiled food; your sump pump keeps working, guarding against flooding basements and your radio or TV keeps working giving you valuable information.

SENTRY-PRO protects your property automatically and gives you a feeling of security and above all, peace of mind.

The automatic sequence of operation with the automatic "ATS" switch system is as follows:

1. Normal commercial power fails.

2. Within ten seconds, the generator starts and produces emergency electric power.

3. The transfer switch will disconnect the commercial power lines and connect emergency generated power to the chosen load in your home.

4. When commercial power returns, the transfer switch will reconnect this normal power back to its regular circuits.

5. The generator will shut down and go back to a "guarding" position, awaiting the next normal power failure.

And now, for the best part.  These actions occur automatically, with no one present!

• HOUSING:  Rust proofed steel enclosure with weather and sound protection, easy service access thru large lockable doors.

• CONTROLLER:  Our "SENTINEL-SCOUT" controller is standard equipment on all liquid cooled 1800 RPM gen-sets.  We urge you to view this separate features page to learn of the multitude of engine-generator protectors, upgrade to "SENTINEL III", plus our new NFPA style ANNUNCIATOR and the new "SENTINEL IV" controller for tele-communication applications.

• MICROPROCESSOR:  This digital controller monitors normal utility power constantly, and when normal power fails, you have emergency power within 10 seconds.  No failure-prone mechanical relays are allowed in this all digital circuitry.

• CONTROL PANEL:  Large and spacious for easier installation connections.  Panel door is lockable.

• INTERIOR AIR DUCTS:  Clean fresh air is ducted into the housing.  The heat generating items (engine and muffler) are ducted out of the housing.  This results in the coolest operating gen-set, available.

• MUFFLER:  Mufflers are used for additional silencing.  Exhaust outlet is directed straight up for better safety.  Critical and residential mufflers are available as an option, for even more exhaust silencing.
   

• AUTOMATIC TRANSFER SWITCH (SUPPLEMENTAL EQUIPMENT):  Designed to automatically switch failed utility power out and emergency generator power in, and connect to your loads.  This electrically operated, mechanically held switch is UL-1008 certified and has the following features:  Engine automatic exerciser, will start and run your gen-set once per week, time delay to start (avoids nuisance starts with common power glitches), time delay for engine cool down before final stop, LED annunciator lights mounted on ATS front cover for showing normal power or emergency power in use, NEMA 1 metal enclosure (for inside installation) or NEMA-3R enclosure (for outdoor installations), and 100 thru 1200 Amp capacity at 240 Volts, 1 phase, or 208, 220, 240, and 480 Volts, 3 phase to match most incoming utility power.  The automatic transfer switch is a separate part of the Sentry-Pro standby package, and it is sold separately due to the many choices of different styles and designs of ATS Systems, available to our customers.

SENTRY-PRO is available in LPG & Natural Gas dry fuel, with General Motors  (1800 RPM) Engines, in sizes 18 to 125 kW.