This twin engine Visual Indicator Panel version of Aqualarm's Automatic Systems Monitor is the "bare bones" version and includes only the lighted, twin engine alarm condition display panel without Mute button (AQA 20031; Model 852) — no circuit board, system detectors or audible alarm are included.
Circuit board, detectors and audible alarm must be purchased and installed separately.
This provides the opportunity to build the system gradually if funds are short, or to create a customized monitoring system.