Portalevel® MAX

The fastest, most powerful and easiest to use ultrasonic liquid level indicator ever produced by Coltraco Ultrasonics. With UL Listing and Full ABS Type Approval, it is ideal for testing large gas cylinders requiring more power output.

8th Generation Portable Ultrasonic Liquid Level Indicator
P/N: 2290334-COMX
NSN: 6680-99-275-5292
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Gas Level Checker and Level Indicators

The Portalevel® MAX Ultrasonic Liquid Level Indicator is specially designed for users looking to identify the liquid level in large numbers of cylinders, containers and gas bottle level indicator, with particularly large agent mass and those requiring UL Approval.

  1. Quick and Easy Testing: The 8th Generation technology testing procedure is short and simple, making the process of inspecting cylinder content incredibly fast. Every cylinder can be inspected in under 30 seconds, with the ‘cal’ feature automatically setting up the unit for each cylinder at the touch of a button. This significantly reduces user error, makes the testing process very simple and requires minimal user training.
  2. Powerful Testing: The Portalevel® MAX also has 4 different power modes (SPA). The SPA feature increases the sensitivity of the device and increases the strength of the output signal. As well as being an ideal unit for co2 bottle level measurement and to check the level of gas, the SPA feature enables the unit to continue working on very large tanks up to around 800KG of agent or containers experiencing high levels of corrosion and pitting.
  3. Wide Range of Verifiable Agents: including but not limited to the common liquefied gaseous fire suppressant agents e.g. CO2 Bottle Level Measurement, Aluminium CO2, FM200/HFC-227EA, NOVEC 1230/FK-5-1-12, FE 25/FE 13, FE 36, Halon 1301/1211, CEA410, NAF S III, Refrigerants/R507

Save Money, Risk and Time with the Portalevel® MAX gas cylinder level checker :

  • Accurate to +/-1.5mm
  • A variety of approvals including UL Listing and ABS Approval and RINA Accepted
  • Fully complies with NFPA standards for use.
  • In a hard aluminium case, it is designed to sustain rough handling and high intensity usage to provide users with a long-term investment.

The unit has an expected lifespan of 10 years with minimal consumables required and with the Coltraco Customer Guarantee, we always promise to buy back the unit for a system upgrade to newer models at any time customer requirements change. For more information on how the Portalevel® MAX works, you can check out our YouTube video here.

Verified Customer Feedback for the Portalevel® MAX:

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Use Portalevel® MAX’s perfect partner – Gas Bottle Level Indicator 

The Portasteele® CALCULATOR provides the perfect companion to the Portalevel® Technology for those looking to convert liquid height to agent mass and export reports to customers, as well as checking gas levels and gas cylinder levels.

Enquire above for pricing, features & information from our sales team within 24 hours.

More Info:

Distributor Spotlight: Chubb International Gulf Trading Company WLL, Qatar using Portalevel® – 17 June 2019

Case Study: Case Study: Food Processing Factory, Slovakia Chooses Portalevel® MAX Industrial


1. Dry Sensor A standard sensor for all land based Portalevel® units. The metal applicator is connected to the unit via 1 meter cable and a BNC connector.

2. Portatherm An infrared thermometer comes as standard. Designed with portability in mind, this device is intended to measure cylinder temperatures.

3. Main Unit The main unit is protected in an IP65 enclosure and weighs 500 grams. It has an LCD digital display with a bar graph and 4 button controls.

4. Ultrasound Gel Ultrasound gel is useful for increasing the surface contact of the sensor. The Portalevel® MAX sensors have also been designed to work with water.

5. Extension Rod (Optional) The extension rod is optional and is  designed for testing banked CO2 cylinders 3-4 rows deep.


  • Height: 160 mm (6.29 inches)
  • Width: 82 mm (3.22 inches)
  • Depth: 30 mm (1.18 inches)
  • Weight: 300 grams (10.58 ounces)


+/-1.5mm (1/8 inch)

Verifiable Agents

CO2, FM-200®, NOVEC™ 1230, old Halons such as 1301 and 1211, FE-13™, FE-25™, FE-36™, HFC-225 & 227ea, NAF S 125.Please speak to our Sales team for the full range.


TX/RX Dry Sensor
  • 14 mm diameter head
  • Contained within a magnetized sensor applicator;
  • Connected to 1 m length cable with BNC connectors.

Power Supply

1 x PP3 9V battery (battery life 10 hours)


Membrane control operated, LCD back-lit Display measuring 55 x 28 mm

Operating Temperature

-20°C to +70°C (68°F to 158°F)


 PLMAX logo
  • UL Listed
  • ABS Type Approved
  • Classification Society Accepted - RINA
  • CE
  • ISO 9001 & ISO 14001 Registered Company


  • Enclosure IP Rating 65
  • NATO Stock Number: 6680-99-275-5292


  • Main Unit: 3 Years Warranty
  • Sensor: 1 Year Warranty
  • Lifetime Customer Support

Package Contents

  • 1 Portalevel® MAX unit
  • 1 Dry Sensor
  • 1 Portatherm
  • Ultrasonic Gel
  • 1 Hard Wearing Carrying Case
  • Calibration Certificate
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