Portamarine® is a low-cost, portable, and battery powered liquid level indicator designed to non-invasively, accurately, and reliably measure the level of fire suppression agent contained within a cylinder. Portamarine® is suitable for most standard size cylinders containing CO2, Liquified Clean Agents and Halons and is specifically equipped for use onboard marine vessels and environments in the marine sector.
P/N: 2290334-COPM
NSN: 6680-99-192-2735
IMPA MSG P/N: 652777
CAGE Code: KD983 – COLTRACO LIMITED
Portamarine® is the ideal low-cost solution for testing marine fire suppression systems. Its tried-and-tested ultrasonic technology allows it to provide reliable test results to ±1.5mm for most CO2, Halon, and Clean Agent fire suppression systems. It is non-invasive and portable, meaning that a single operator with one Portamarine® unit can test an entire bank of cylinders of varying sizes and agents. The quick, easy, and accurate measurement process using Portamarine® allows for greater operational efficiency and a streamlined testing process with no downtime for the fire suppression system. Without the need to weigh and dismantle cylinders, contents can be checked safely and reliably by the crew themselves.
Portamarine®’s non-invasive nature also removes any risk of accidental discharge, since it does not need cylinders to be disconnected and dismantled. When used alongside the Portasteele® CALCULATOR, the agent weight can be determined from the liquid level, meaning that an operator can calculate the amount of agent within a system without having to physically weigh cylinders. This allows for a faster, safer, and more efficient way to comply with marine safety standards like IMO SOLAS FSS Code and MSC.1/1318.
The Portamarine® is designed specifically for the marine industry:

| Dimensions | 172x110x47 mm (L x W x D) |
| Unit Weight | 420g (with batteries) |
| Power Supply | 4x AA 1.5V Batteries |
| Battery Life | 10 Hours Continuous Use |
| Sensor Type | 14mm Magnetically Mounted |
| Sensor Connectivity | 1m BNC Coaxial Cable |
| Sensor Frequency | 1MHz |
| Operating Temperature | -10 °C to +65 °C (14 °F to 149 °F) |
| Display | LCD Numeric Digital Display with LED Bar Graph |
| Accuracy | ± 1.5 mm / ± 1/16 inch |
| Classifications & Approvals | RINA Classification Society Accepted |
| Certifications | UKCA, CE, Coltraco is UKAS ISO 9001:2015 and ISO 14001 registered |
| Warranty |
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The Portamarine® can measure the level of a wide variety of liquids. The primary application is for checking the liquid level in fire suppression cylinders. These agents commonly include: CO2, FM200™ (standard size cylinders), NOVEC ™ 1230 (standard size cylinders), Halon agents, FE-13™, FE-25™, NAF S III™ and, most core Clean Agent systems.
The Portamarine® can identify the liquid level to ±1.5 mm of the actual liquid level. When using the Portasteele® Calculator to convert the liquid level to agent weight, the results are accurate to within 1%.
The Portamarine® is very versatile and works on a large range of cylinder sizes. We have an extensive range of products that can measure anything from 10 cm to over 15 m diameter, so get in touch to find out which unit is suitable for your application.
No, you can use any ultrasonic gel, available in most pharmacies, as well as petroleum jelly. Water will also work, but in hot environment needs very regular application.
No, unfortunately above this temperature CO2 converts into a supercritical fluid state meaning your cylinder will no longer have a liquid level to measure. We recommend testing CO2 in lower temperatures. Please, get in touch if you need recommendations for hot climate CO2 monitoring.
With the Portamarine®, you also get an extension rod that allows you to measure the liquid level in banked cylinders up to four deep.
Yes, however, these agents are far more stable at higher temperatures that CO2, and although the liquid level will naturally rise with increased temperature it is far less than with CO2 and, therefore, can still be tested.
Yes, this unit is specifically designed to work despite the presence of a siphon tube.
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