Description
The 918 alarm box pairs with Morrison gauges or sensors to provide audible and visual indication. It can be mounted remote from the gauge, supporting modular dry-contact devices. The 918D supports two channels; the 918Q supports four, allowing monitoring of multiple tanks or sensors from a single, compact unit.
Features
- Visual alarm indicator lights turn red to identify the alarming input channel
- 90 dB audible alarm at 4 ft
- Self-powered by single-cell long-life replaceable lithium battery
- Low battery indicator light turns yellow when power is low
- NEMA 4X water-resistant polycarbonate enclosure
- User-defined alarm labels per input channel
- Normally open or normally closed selectable per input channel
- Modular contacts for easy connection of dry contact simple switch devices
- Internal ON/OFF switches for power, audible alarm, and auto-silence mode
- Can be installed remote from the connected gauge or sensor
- Compatible with Morrison 918 clock gauges and 924, 924LS, and 925 level sensors
- Compliant with UL 913 intrinsic safety standards — Class I, Division 1 & 2, Group D
Options
- 918S: Single channel — connect one device
- 918D: Dual channel — connect up to two devices
- 918Q: Quad channel — connect up to four devices
Applications
- Liquid level monitoring and overfill alarm in aboveground storage tanks
- Multi-tank monitoring installations using a single alarm unit
- Hazardous location fuel storage facilities requiring intrinsically safe equipment
Certifications
- cULus 913 Listed
- Florida DEP EQ-527
- Intrinsically safe — Class I, Division 1 & 2, Group D hazardous locations
