SJE-Rhombus SES Controls Tank Alert Alarms

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Tank Alert® DUO

Indoor/Outdoor Tank Alarm Monitors Two Alarm Conditions

Tank Alert® alarms provide warning of potential threatening liquid level conditions.

The Tank Alert® DUO alarm system has been redesigned to offer you more features at an affordable price! This indoor/ outdoor alarm monitors two level conditions in one easy-to-install alarm in lift pump chambers, sump pump basins, holding tanks, sewage, agricultural, filters and other waste applications.

The new design features two colored beacons for easy visual identification of alarm 1 and 2, so with a glance you can see which level is alarming. The alarm buzzer and red beacon activate for a high water alarm. The alarm buzzer and yellow beacon activate for alarm 2. Once the condition is cleared, the alarm automatically resets.


Tank Alert® DUO


  • DUO alarm inputs to monitor 2 levels
  • Colored beacons provide easy visual detection of alarms
  • Alarm buzzer provides audible alarm indication Alarm buzzer and red beacon activate for high water alarm
  • Alarm buzzer and yellow beacon activate for alarm 2
  • Alarm system (when installed on separate circuit) operates even if pump fails.
  • Enclosure meets type 3R Water-tight standard
  • Automatic alarm reset
  • “Knock out” holes for conduit entry location
  • Alarm test/normal/silence switch
  • Includes auxiliary alarm contacts for easy attachment of remote devices
  • Includes 15’ SJE SignalMaster® control switch
  • Can be used as high level, low level or filter alarms

UL/cUL Listed

Five-Year Limited Warranty



Tank Alert® DUO

120 VAC, 50/60 Hz

10.75 x 6.5 x 3.75 inch (27.31 x 16.51 x 9.53 cm), indoor-outdoor, weatherproof thermoplastic meets Type 3R water-tight standard

Provides audible alarm indication

UL Listed, Type 4X beacon assembly

250 VAC, 5 amp max., 50/60 Hz

Water shedding

SJE SignalMaster® control switch with mounting clamp
Cable: 15 feet (4.57 meters), flexible 18 gauge, 2 conductor (UL) SJOW, water-resistant (CPE)
Float: 2.74 inches diameter x 4.83 inches long (7.0 cm x 12.3 cm), high impact, corrosion resistant polypropylene housing for use in sewage and water up to 140oF (60oC)




Available Downloads

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Visit our downloads section of this website for additional literature.

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