Liquid Level to Weight Conversion Calculator

The Portasteele® CALCULATOR is the perfect partner to any of Coltraco Ultrasonics’ liquid level detectors. It allows you to convert your measured liquid level to an agent weight, precisely and accurately. These readings can then be saved and exported for future reference and traceability. 

Used in partnership with the Portalevel® Ultrasonic Level Indicator range 

P/N: CALC-007

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Overview

Liquid level to agent weight calculator & data recorder

Ultrasonic liquid level detection is a considerably more practical means of monitoring the contents of your fire suppression cylinders than removing and individually weighing each cylinder. It is quicker, easier and, as it avoids any down time of your fire suppression systems, safer than the alternatives. However, cylinder manufacturers do not provide the liquid level of a filled cylinder; the only documented evidence of a cylinder’s contents is its fill weight. Furthermore, the liquid level will fluctuate with temperature, as the density of the liquid changes. This will happen by different amounts for different agents and cylinder sizes and, therefore, is not trivial to predict. 

The Portasteele® CALCULATOR solves both of these issues. Using dimensional data about the cylinder provided by the user and the liquid level found with one of our Portalevel® units to precisely calculate the agent weight. This Portasteele® CALCULATOR automatically handles the effect of temperature in its calculations and allows you to reliably calculate the mass of agent in your cylinder to within 1% of the true value. This allows your liquid level measurements to be compared directly to the fill weight printed on the cylinder providing you with unparalleled traceability to your liquid level measurements. 

Smart data recording 

The Portasteele® CALCULATOR is designed for use with cylinders containing liquified agents, where there are distinct liquid and gas regions in the cylinder. However, there are a number of agents, such as COand FE-13, which have what is known as their “critical point” within standard atmospheric temperatures, when stored at pressure. When a substance reaches its critical point, it ceases to exist as distinct layers of liquid and gas and becomes something known instead as a “supercritical fluid”. When this occurs, it is no longer possible to use the liquid level to monitor contents, as there will be no liquid level.  

The Portasteele® CALCULATOR takes away the option to record data for substances that will likely be in this state. For CO2, for instance, this critical point occurs at 31°C, so if a user inputs a temperature in excess of this, the Portasteele® CALCULATOR will present an error and they will not be able to proceed and save this measurement.  

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What's In The Box

  Portasteele® CALCULATOR:Handheld, rechargeable 7-inch touchscreen preloaded with the Portasteele® CALCULATOR applications
  USB Type-C to USB Type-A Adapter:To allow direct plug-in of a USB stick for exporting data
  USB Type-C cable:For charging and data transfer
  Power Adapter:For charging
  USB Stick :To save your data on
  Quick Start Instructions:Contains comprehensive guidance as to how to use the calculator
  Phillips screwdriver #1 point size:To remove backplate for sim card (not necessary)

Technical specifications

Technical Specification
Hardware (Tablet)

Dimensions

  • Height: 216mm
  • Width: 136mm
  • Depth: 19mm
  • Weight: 558g

Water/dustproof rating

IP67 

Materials

PC+TPU 

Sim Card

Dual SIM card dual standby (1 micro + 1 nano) 

OS

Android 9.0 

CPU

Android 9.0 

Data Transfer

USB Type-C/BT 

Screen

7.0-inch HD IPS capacitive touch screen, 1280 x 800px

Power Supply

  • Built-in 8000mAh rechargeable Li-ion battery 
  • Up to 200 hours standby time 
Software

Compatible Agent Types

  • CO2 
  • FM-200® 
  • NOVEC 1230 
  • Halon 1211 
  • Halon 1301 
  • Fe-13™ 
  • FE-25™ 

Accuracy

Accurate to 1% of true agent weight when used with a Portalevel® unit

Cylinder Type

  • Welded cylinders 
  • Seamless cylinders 

See the Portasteele® CALCULATOR in action.

Frequently asked questions

The equations used by the Portasteele® CALCULATOR are highly accurate, as long as the dimensional data supplied is accurate. If you are finding that the agent weight is consistently too low, please check the following: You have entered all the dimensional data of the cylinder correctly You are using the agent weight and not the gross weight In some cases, agent weight is not printed on the cylinder so you may use the gross weight minus the tare weight. In this case, please ensure that you consider the valve weight. For liquified clean agents, the cylinder will contain pressurised nitrogen as a propellant. Different manufacturers will either include or exclude this weight from the quoted agent weight. The Portasteele® CALCULATOR does not include this. Ensure that that you have found, measured and entered the liquid level correctly.
The equations used by the Portasteele® CALCULATOR are highly accurate, as long as the dimensional data supplied is accurate. If you are finding that the agent weight is consistently too high, please check the following: You have entered all the dimensional data of the cylinder correctly Ensure that you have found, measured and entered the liquid level correctly
For security reasons, any external applications must be vetted and approved by Cotlraco before they can be used. If you require an additional application, please contact us at support@coltraco.co.uk with the serial number of your device and the name of the application you wish to use. The serial number can be found in the top left corner of the device and is a seven-character long code, starting with “PS”.
All of the settings you need for the normal operation of the device (e.g. WiFi, time zone, brightness) should be available in the menu seen when tapping the three dots icon in the top right corner of the screen. The “Settings” option is to access the advanced device settings. For security reasons and to ensure that the device functions and displays correctly, these settings are password protected. If you require access to these settings, please contact support@coltraco.co.uk with the serial number of your device and a description of the issue. The serial number can be found in the top left corner of the device and is a seven-character long code, starting with “PS”.

Related Products

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P/N: 2290334-MINI

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