Built-In Battery Backup - The built-in nickel cadmium battery pack will power the pump for over an hour, providing peace of mind during power outages or in moving the equipment. The settings not only stay in memory, but the pump will actually run on the battery for over an hour. When turned off, the memory of the last rate setting remains in the pump electronics for 24 hours, so when turned back on, it rapidly returns to the previous setting.

Precision Gear Drive - Internally the Swiss-made motor and gearbox power the rotor at 12 RPM, providing 24/7 operational capability as well as consistent dosing rates. To see the gear drive assembly, which is normally hidden within the pump, click here.

Bright LED Display- Easily visible from a distance or underneath darkened cabinets. See a real-life example here.

Quiet Operation- This pump runs exceptionally quietly, making less noise than most desktop computers.

Fixed-Dose Capability- Easily set a fixed volume to be dosed using the "dose" control button, providing a simple way to administer medications or other one-time additions of materials, or to acclimate livestock by adding a fixed volume of aquarium water.

Guarantee- The Sentry is guaranteed agains mechanical or electronic defects for Two Years, both parts and labor. Damage by moisture or customer abuse of the equipment is not covered.

"The Sentry" model offers:

Float Switch Compatibility. A Float switch is available as an accessory, and is plugged into the control jack in the back of the pump. The float switch is connected to transistor-level voltage, providing safety and dependability. Thus the pump can be set up to run only while the float switch is in the "down" position, preventing overflows and providing peace of mind. Float switch photo here.

High Volume One Channel System. The Sentry is made to be used as a one-channel makeup water doser. Using the included long-life tubing set, the Sentry will pump up to 800mL per hour, or up to 5 gallons per day.

Two-Channel Capability Built In, with digitally adjustable dosing rates from .3 ml. to 85 mL./hour per channel when used with the included 2-channel tubing set. To see the 2-channel tubing set output, (Quicktime movie) click here.

A/C Control - Using the optional A/C controller, the Sentry can easily be controlled by other devices, such as pH controllers, electronnic float switches or aquarium monitoring systems. A/C Control pictured here.

Water-resistant construction, with an interlocking housing and flat panel membrane switches for safety, moisture resistance and easy cleaning.

The Sentry will utilize liquid from containers 3 feet below pump and will pump vertically at least 15 ft.

Compact - measures only 6'" long x 5" deep. (The same size as two playing cards side-by-side), and 7" high.

Uses less than 5 watts of electricity.

Purchase of the Sentry includes single-channel 800 mL/hour dosing system and the darkness sensor.