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FIG 918SB, 918DB, 918QB

Tank Alarm with Rotating Beacon

The Morrison 918 series alarm box with rotating beacon is designed for applications requiring an intrinsically safe audible alarm and 360º rotating visual beacon for alarm indication in addition to audible alarm horn upon activation of a simple switch input signal.

Product Features

Standard Features

10 red LED lamps create strobe visual effect during alarm indication

Audible alarm ON/OFF globally selectable

Audible alarm auto-silence mode (10 minutes) ON/OFF globally selectable

Normally open or normally closed selectable by input channel

Internal ON/OFF power switch

90 dB audible alarm at 4 feet

Self-powered by long-life replaceable lithium battery

Low battery light turns yellow indicating battery power is low

Simple push test button

Alarm indication latched until alarm activation is acknowledged

User-defined alarm labels

NEMA 4X water-resistant enclosure

Compatible with Morrison 918 clock gauges and 924, 924LS, and 925 level sensors

Can be installed remote from gauge or level sensor

Modular contacts make it easy to connect a variety of dry contact simple switch devices

918SB is a single input channel tank alarm box

918DB is a dual (2) input channel tank alarm box (input channel indicator light on front panel)

918QB is a quad (4) input channel tank alarm box (input channel indicator light on front panel)


Construction Details

  • Alarm Box… Polycarbonate plastic
  • Battery… Lithium


Code Compliance

Florida DEP EQ-868; cULus 913 Listed; Intrinsically safe for Class I, Division 1 & 2, Group D hazardous locations

Product Ordering Instructions

Figure Suffix Description Weight (lbs)
918SB 1000 AA Single channel tank alarm box only 2.04
918DB 1100 AA Dual channel tank alarm box only 2.04
918QB 1100 AA Quad channel tank alarm box only 2.04