ADVANCED TANK MONITOR

WATER TANKS

Problems faced by users with fresh water tanks are:

  • Knowing the usable capacity
  • Know the capacity available in litres

USABLE CAPACITY

There can be significant differences between the theoretical capacity of a water tank and the usable capacity.

To understand the problems that cause this go to oue ebook which steps through the causes and how to increase usable capacity on virtually any tank.

Determining the usable capacity is easy.

  • Purchase a low cost water filling meter. (one at the end of this article)
  • Drain the water tank on level ground.
  • Fill the tank and measure with the meter until the breather is overflowing just a little.
  • Take the meter reading and subtract a litre of so for the breather tube volume and overflow.

Now you have the maximum usable capacity of your tank.

KNOWING THE CAPACITY AVAILABLE IN LITRES

This is the hard one for most systems. The reason is:

  • Level measurements are used that can be linear in a non-linear tank volume.
  • Level sensors fail or give faulty readings
  • There was no original calibration by the manufacturer and the tank reading are an estimate.

SIMARINE solves these problems in a simple and clever way using Artifical Intelligence.

  • No problem with the water volume remaining estimate in an unusually designed water tank.

For each change of water level sender point (if fixed measuring level points), you enter the volume of water change in litres against a calibration value.

Use one of the simple filler meters and enter the litres for each sender point.

  • Watch the reading level jump when a sensore point is touched by the water
  • Pick a similar interval change for the calibration if a variable analog sensor is used.
  • Dont be concerned about having exact interval points on variable level senders. The system will do the smarts for you.

UP TO 11 CALIBRATION POINTS

Between "full" and "empty" :

  • 11 calibration points that can be added.
  • View the list of calibration points for a tank and add new calibration points or remove existing ones.
  • More calibration points will enable PICO to show tank level more accurately. 
  • For each calibration point, tank fill volume and a corresponding sensor value (resistance or voltage) must be set.

SIMARINE then calculates the estimated volume change between each sender point and uses a unique change variable. 

Tank Sensors:

FAULTLESS WATER CAPACITYSAFIERY University on Alarm Management

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GREY WATER TANKS

 

  • Have the same features as fresh water measurement described above.
  • Common today to have ultrasonic sensors reading grey water tank levels asthe sensor cant be fouled.
  • Use the same water filling meter to measure the available volume.

Ultrasonic sensors work well provided:

  • there is some liquid in the tank
  • There is a "dead band" at the top of the tank where measurement can be eratic.

SIMARINE works very well with the same 11 calibration points between full and empty with these sensors.

BLACK WATER TANKS

  • Have the same features as grey water measurement described above.
  • Essential today to have sealed ultrasonic sensors reading black water tank levels as the sensor cant be fouled.
  • Use the same water filling meter to measure the available volume.

Ultrasonic sensors work well provided:

  • there is some liquid in the tank
  • There is a "dead band" at the top of the tank where measurement can be eratic.

SIMARINE works very well with the same 11 calibration points between full and empty with these sensors.

 

REMOVABLE CASSETTE TOILET  TANKS

A sensor for these will be reased soon. Join our mailing list to get early advice of when it is available.

 

WATERLESS TOILETS (OR COMPOSTING TOILETS)

A sensor for these will be reased soon. Join our mailing list to get early advice of when it is available.

 

LPG TANK LEVEL MEASUREMENT

The problem with LPG tank measurement is:

  • Sensor has to be very low energy to comply with gas safety standards
  • Sensor has to be secured against vibration.

We are researching options for this.