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Bulksafe sensors are solid state devices with
no float or other mechanisms to fail, or in-built filters requiring
regular cleaning, they provide a 4-20mA 2 wire output which gives 4mA
when the cargo hold is empty. This ‘live zero’ signal provides an
immediate indication of sensor health, a feature not available to simple
switch devices. Any water ingress which is detected while the tanker is
underway will immediately cause this output signal to rise triggering an
alarm condition.
PSM Bulksafe systems require only one
sensor per hold to detect both pre and main alarm conditions, sensor
and system operation may be checked at any time irrespective of hold
status by using a simple test
For additional refinement a 2 wire multidrop
network links all alarm sensors to the central monitor, and embedded
diagnostics in the sensor continually monitor its operational health. Any
errors are immediately reported. The modbus link also enables full remote
testing and water detection alarm condition simulation from the Bridge.
On receipt of an instruction from the central monitor a sensor can set its
4-20mA output to any value, irrespective of the status of the cargo hold. Installation / retrofit is simple, the sensor is supplied with the required length of cable and simply mounts within a shipyard supplied pipe, clamped to the inside of the tank. Where holds have a lower stool and or a keel duct alternative installations are possible PSM provide a full range of support fittings and tank penetrations to suit any requirement, and will be happy to supply suggested installation drawings. 
Simplicity of operation is a key feature. The user is guided by a full menu structure and all messages and prompts are provided in plain English on a backlit LCD display. Dedicated function buttons provide immediate ‘shortcuts’ to auto-calibrate and system tests, and dedicated visual annunciations provide immediate identification of ‘all clear’, “Alarm, active”, “system fault” and “power-fail” conditions. Water ingress detection in cargo alarm conditions also trigger an internal relay which may be used to drive external remote mounted audible and visual annunciations. If required repeater displays are available for remote locations These communicate with the primary display via a 2 wire RS485 serial link and provides an overview of the entire system status. This remote display can also be used to acknowledge alarm conditions. Multiple remote displays can be connected if required. 
In accordance with the Regulations individual sensors may be disabled if a tank is to be used for Ballast on a particular voyage. Upon emptying of the tank the alarm monitoring is automatically re-enabled. In the event of a primary power source fail, the central monitor will automatically switch to the ships emergency back-up supply and dedicated buttons and menu routines provide a complete operational health check without the need to enter the hold Price: Please email with ships particulars for quotation
RiverSide Marine Electronics 4520 NW 27 Ave Unit # 2 Miami, Florida 33142 PH (786)287-6136 Fax 1-866-256-0792
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