The 2004 revision of the SOLAS Convention requires bulk carriers and other vessels to be equipped with a water ingress alarm system. Our system applies liquid-level indicator technology to detect the water level and is sold as an integrated system from sensor to alarm panel. •Compatible with various ship classi cations (NK, ABS, BV, DNV-GL). Type approval obtained. •MED (Marine Equipment Directive) certi ed for European ship registry. •JG ship classi cation compatible with ferries and other vessels (requires JG witness inspection). •It consists of a control panel that controls sensors, barriers, and alarm circuits for detection, and an alarm panel mounted in the wheelhouse. •A valve remote device drainage system for the bow compartment is installed in conjunction with a water ingress alarm system (such as IP68 electric valves and air-acting piston pump-type hydraulic valves). •Explosion-proof grade (Exia IIC T6) compliant (explosion-proof is not required for air-purged type). •Equipped with fail-safe function for self-diagnosis of malfunctions. This sensor can be installed either inside or outside a tank. In principle, the sensor directly detects the static pressure (P: pressure measured at a depth) of the liquid. As with the air purge type, the pressure P is equal to the value obtained by multiplying the liquid level gauge height H by the speci c gravity of the liquid γ. The sensor detects the static pressure of the liquid with an internal pressure-sensitive element and converts it into an electrical signal. This electrical signal is ampli ed and adjusted by the internal circuit •No air piping is required, making it easy to secure space inside the control panel. •Since it uses electrical signals, it is easy to connect to LCD, PLC, and touch panels. •Can be used with tanks that are dif cult to use with the air purge type, such as fresh water tanks. •This sensor is intrinsically safe and can be used in hazardous areas. Float Type Air Purge Type Impedance Type Pressure Type ALARM PANEL CONTROL PANEL SENSOR ・CONVERTER ・ANNUNCIATOR UNIT ・DC POWER SOURCE BARRIER PANEL WATER INGRESS ALARM SYSTEM Features Features of the sensor, and the raw sensor signal of 4–20 mA DC is transmitted as a current signal to an insulation transducer and an indicator. The cable used between the sensor and the junction box is a special cable with a built-in air tube, and through the atmospheric opening of the junction box, atmospheric pressure is always applied to the back pressure of the pressure-sensitive element in the sensor to automatically compensate for errors caused by atmospheric pressure uctuations. 14 NAKAKITA VRCS PRODUCT CATALOG
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