◈ Operating Principle
  Operating priciple is based upon the measurement of the hydrostatic pressure at the
bottom of the tank by injection of air or inert gas through a bubbling probe.
  The output pneumatic signal of the constant flow regulator is fed into P/I converter
and is changed to electric output signal(4~20mA) can be connected to C.R.T display
cargo system. Digital indicator, analogue type indicators, etc. or a combination of
these system.

◈ Features
 • Liquid level of measuring depth pressure is indicated for direct reading, and then the
   high precision is achidved.
 • The construction is simple and the handling and maintenance is easy.
 • 4~20mA output signal/2-wires.
 • Blowing valve is select type(change over type)
   So blowing is very easy.
 • Included stop valve at air purge head, other pressure is no need for line leakage test.

◈ Application
 • Ballast tank remote reading
 • Draft remote reading
 • Fuel oil tank remote reading
 • All liquids even viscous ones(molasses bitumen, etc.…)

◈ Standard Specificatian
 • System type : One line type air purge system
 • Flow rating : 10~80NI/hour
 • Working temp : 0~50℃
 • Supply air setting pressure : 4.5㎏/㎠
 • 400m Max. distance of signal line and constant flow regulator
 • Signal line size : OD 8 or OD 10
 • Range : 1 to 40 meter
 • Output : 4~20mA, 2wire system
 • Power supply : 16 to 32VDC
 • Accuracy : ±0.5% of F.R(Option), ±1.0% of F.R(Std)

◈ Principle Digram


 The flow is produced by means of on automatic constant flow regulator, type which
includes.
 • An air supply filter
 • An air flow regulator ensuring a constant pre-set flow at the end of the sounding
   pipe in the tank irrespective of the supply pressure.
 • Gauge saver is used for protecting the indicator and pressure transmitter against
   over pressure.
 • The air supply valve is used for isolation from other channel without any influence.
 • The blowing valve in used for sending the full air pressure through the signal line
   for cleaning purposes.