Pulse Purge Type Level Gauge LAX

Pulse Purge Type Level Gauge,
Ingress Alarm & Draft Gauge Device.
Reliable measurements for
safer, ship-friendly cargo

Pulse Purge Type Level Gauge LAX

LAX is the world’s only liquid level gauge to adopt the pulse purge method to intermittently discharge compressed air. Together with digital signal processing and an automatic zero point correction function, LAX achieves high accuracy on par with the magnetic float type level gauge Level Master. At the same time, the ease of outfitting and versatile application in a variety of tanks, allows for application on a wide range of ship types. LAX also reduces air consumption and running costs.
From the tanks in the engine room to ballast tanks and ingress alarms, LAX can cover the entire ship from one L-Core, containing SV Units, power supply and transmitter box, and air supply unit.

System Configuration

Concept Movie

Three patented technologies achieve the dream of very high accuracy

Digital × AI technology solves the hysteresis problem

In measuring liquid levels in which a change in pressure is received at a diaphragm and electrically converted by a strain gauge, hysteresis (historical phenomenon) occurs in the detected electrical potential as the pressure rises or falls. Large margins of error in measurements lead to poor accuracy.

LAX solves the hysteresis problem by combining zero point correction of the pressure sensor in the L-Core, digital processing, and AI technologies. This enables a very high accuracy of ±10 mm.
In addition, an air pocket is created between the receiving surface of the diaphragm and the liquid, thus eliminating problems with electrolytic corrosion or calcium buildup.

Using three (including pending) of Musasino’s patented technologies, advanced digital processing and AI technology, provide performance that could not be achieved with analog.

LAX-WAC Diaphragm type

measurement without bubbles

Innovative Pulse Purge Type Level Gauge with Exceptional Measurement Accuracy

±10mm at 25m

Musasino’s patented pulse purge method L-CORE takes high accuracy measurements. Temporarily discharging a higher pressure of compressed air, and stopping the air flow during measurement, eliminates the pressure loss and fluctuation, allowing for high accuracy measurements. This method suppresses hysteresis, and results in high-precision liquid level measurements.

Ballast Tanks, Fuel Tanks,
Draft Gauges, Flood Level Gauge
Fresh Water Tanks,
Engine Room Tanks

Measurement accuracy test

Shirakawa factory LAX Measurement data

Module (MIU) Developed in-house.
Easily Acquire a Wide Variety of Signals.

MIU is a proprietary interface, developed to capture all of a ship’s data. The unit consists of a series of nodes that enable acquisition of various types for signals – analog, serial, contact, LAN, etc. By combining various nodes corresponding to the types of data required, managing cargo handling-related equipment such as monitoring and control systems – including third party systems – can be integrated.

Automatic Atmospheric Pressure Correction (patented) & Temperature Compensation.
Self-correcting for high accuracy measurements.

Another feature that results in high accuracy measurements is the self-correction function. An atmospheric pressure reading is taken regularly, and in the pulse purge method a zero point correction is made when the airflow is stopped. As a result, there is no restriction on where the unit can be installed, and errors due to aging of the pressure detector are prevented, so that stable, high accuracy measurements can be made over the long term. Because temperature may also affect the pressure sensors measuring liquid level, temperature compensation is also done.

General Specifications

Measurement Method Pulse Purge type
Power Supply AC100〜220A
Accuracy ±10mm(25m) / LAX-PH
±20mm(5m) / LAX-WAC
Protection Class MPP-Unit: IP44
Alarm Panel: IP22
Air quality Dry air for measurement
Ambient Temp. Range 5-55℃ (MPP Unit / Alarm Panel)
Interface LAN, RS485
Classification Approval ABS, BV, CCS, DNV, KR, LR, NK

Detector sensor

Various Detectors to Match the Applications.

TOP-MOUNT type purge head installed on the top of the tank, WAC purge head that does not discharge air to the tank for drinking / fresh water tanks and E/R storage tanks in the E/R, and the immersion alarm device ADM that can measure two points with one unit, are available according to the application.

Simple structure & maintenance-free

Accuracy: ±10mm(25m)
Applicable Tanks: Ballast Tanks, FO/DO Tanks, Draft Gauges


LAX-ADM Water Ingress Alarm
Fail safe function, liquid level measurement even after an alarm

Accuracy: ±30mm / ±10mm
Application: Ingress Alarm, Bilge Alarm

Water Ingress Alarm

Diaphragm type, measurement without bubbles

Accuracy: ±20mm(5m)
Applicable Tanks: Drinking Water, Fresh Water, Settling Tanks, Storage Tanks, Service Tanks, Other Engine Room Tanks


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