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VEEDER-ROOT Hydrostatic Sensor For use with TLS and ILS Systems �4. Veeder-Root's Hydrostatic Reservoir Sensor accurately detects fluid level change in the reservoir and interstice of a double-wall storage tank. Dual-float and single-float technology models are ideal for locations with high or low water tables. Available in a dual-float or single-float configuration. The Dual-Float Hydrostatic Sensor is ideal for high groundwater areas, and can differentiate between a high level alarm condition and a low level alarm condition. If an inner-wall leak occurs, the brine solution seeps into the tank lowering the brine level in the reservoir. The Dual-Float Sensor will then trigger a low level alarm. If an outer-wall leak occurs, the groundwater seeps into the reservoir. The dual-float sensor will then triggers a high level alarm. The Single-float sensor is ideal for low groundwater areas, since it only detects low level alarm conditions. If an inner wall leak occurs, the brine solution seeps into the tank. If an outer-wall leak occurs, the brine solution leaks out of the tank. In both cases, the brine level decreases and the Single-Float Sensor triggers a low level alarm. Features Dual-float sensor alarm conditions: • Leak in inner wall triggers a low level alarm • Leak in outer wall triggers a high level alarm in high groundwater areas; low level alarm in low groundwater areas Single-float sensor alarm conditions: • Leak in inner or outer wall triggers a low level alarm in low groundwater areas Temperature Rating Storage: -40 degrees C to + 70 degrees C Operating: -25 degrees C to +40 degrees C Rests in salt brine solution of up to 30% calcium chloride Cable length: 12 feet Single-Float Sensor Dimensions: 6.0" high, 2.5" diameter Dual-Float Sensor Dimensions: 19.3" high, 2.5" diameter • Withstands removal from reservoir several times a year without sensor damage