Acoustic, non-invasive pressure monitoring system, in an intuitive Android platform.

Portagas® is a world’s first technology for non-invasive, non-destructive monitoring of pressurised, inert gas systems.

P/N: 3107505-GAS

Get help buying? Chat now, email or call +44 207 629 8475

Send Pricing & Information


Non-invasive pressure monitoring system


Coltraco Ultrasonics are global leaders in the monitoring of liquefied and non-liquefied gaseous extinguishing systems that protect high-asset value and critical national infrastructure installations.

Portagas® is a unique and innovative contents monitoring solution for pressurised, non-liquified inert gas cylinders. Through a combination of sophisticated signal processing and data-driven, empirically verified algorithms, Portagas® utilises acoustic technology. This is used to detect even minor changes in the internal pressure, with precision comfortably exceeding the 5-10% agent and pressure loss thresholds cited in regulations such as NFPA 2001 and ISO 14520.

Inergen™ is typically stored in seamless cylinders at pressures between 100-200 Bar. At such pressures they are subject to slow seepage of contents or occasionally accidental discharge. If the gas is insufficient to develop the design concentration required the fire event will not be extinguished.

Pressure alone is not sufficient to fully understand the status of a cylinders’ contents; the pressure of a sealed container is directly related to its temperature. This means that, unless properly adjusted for changing temperatures, a change in pressure does not necessarily mean that the cylinder is leaking. Conventional pressure gauges typically address this by indicating a range of acceptable pressures based on different temperatures. This is a useful indication; however, these ranges are typically quite broad and relies on the personnel conducting the checks to properly account for the temperature.

The Portagas® tackles this issue head on, with an infra-red thermometer built into the sensor that will take a current temperature measurement at the point of testing. This temperature is then used, along with fill pressure and fill temperature, to determine precisely what the pressure should be at the current temperature. We use the most accurate models available for pressurised gases in making these adjustments, accounting for the intrinsic forces and characteristics of the contained gas.

This temperature-adjusted pressure is then compared with the pressure determined acoustically by the Portagas®, allowing it to intelligently and automatically determine whether an observed change in pressure is due to changing temperatures or a loss of contents, all with the tap of a finger.

Portagas® also allows you to effortlessly keep track of your maintenance. Each test you conduct can be saved to the device along with a date and time. The full record of all the tests conducted can then be viewed and filtered by date and site on the device, or you may choose to export the data via email or USB. This data can be exported as either a simple CSV file, for integration into existing records, or in an automatically generated PDF report.


What's In The Box

  1 x 8” Android Tablet: Handheld, portable Android tablet with 8-inch multitouch display
  1 x Portagas® Acoustic Sensor: Compact, handheld and ergonomic sensor with USB connectivity
  1 x Micro-USB to USB-A cable: Cable to connect sensor to tablet
  1 x USB-A to Micro-USB Adapter: Adapter to connect sensor to tablet
  1 x USB Stick: 2GB USB stick for exporting records or data
  1 x Micro-USB Charger: Micro-USB charging cable with wall adapter for Android tablet

Technical specifications

Technical Specification
  • Height: 210mm (8.26 in)
  • Width: 124.4mm (4.90 in)
  • Depth: 8mm (0.31 in)
  • 345g (12.17 ounces)
  • 8” LCD Display
  • 800x1280px resolution
Power Supply
  • Rechargeable, 5100mAh Li-Po battery
  • Micro-USB charging (charger provided)
  • Test data in CSV file format
  • Automatically generated PDF report
  • Export via USB or email


Sensor Dimensions
  • Height: 70mm (2.76 in)
  • Width: 50mm (1.97 in)
  • Depth: 30mm (1.18 in)
Sensor Weight
  • 90g (3.17 ounces)
Sensor Power Supply

Sensor powered by the USB port on the tablet

Sensor Sampling frequency


Sensor Thermometer

Infrared thermometer

Sensor Connectivity


Sensor Cable

1m Micro-USB -> Micro-USB (different lengths available on request)

Sensor Operating temperature

-10 °C to +40 °C / 14 F to 104 F

Sensor Warranty

1 year

See the Portagas® in action.

Frequently asked questions

Gases stored in a sealed container will exert a pressure on the internal walls of that container. This pressure depends on the temperature of the gas as well as on how much gas is contained. Pressure, therefore, when properly adjusted for changing temperatures, is a direct measure of the amount of gas stored in a cylinder. Furthermore, regulations such as ISO 14520 and NFPA 2001 state that pressure must be monitored for inert gas systems.
Portagas® is used for detecting changes in pressure from an initial, known value. These changes in pressure are adjusted for changes in temperature and used to determine precisely whether an observed change is due to temperature or to a leak.
Yes, Portagas® allows you to keep records of all of your tests, organised by date, time, site and cylinder. These records can easily be filtered and exported via email or USB as either a simple CSV file, or as an automatically generated PDF report.
The Portagas® will work with most single-walled, pressurised, gaseous cylinder systems. However, the calibration of cylinder resonance to internal pressure is specific and individual for each model or size of cylinder, and so for accurate results, typically a discharge calibration is required.

Related Products

The most accurate and fast acting constants loss monitoring system of its kind. Capable of detecting a loss of agent mass to within 1% in Inert gas, CO2 and Clean Agent systems, and in addition to weigh loss, will provide accurate percentage pressure loss of Inert gas systems associated with agent contents leakage.

P/N: 2594650-FW

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