One XTR2 smoke cartridge typically provides around 50 to 75 smoke tests, depending on the duration of each test and the specific detector type being tested. This makes a single cartridge sufficient for a solid day of testing across a vessel’s detector network. The exact yield can vary based on how long each smoke activation runs and the testing conditions onboard. Below, we answer the most common questions about XTR2 cartridge use, testing frequency, and what to do when supplies run low.

What is the XTR2 smoke cartridge and how does it work?

The XTR2 smoke cartridge is a replaceable consumable used with the Testifire XTR2 detector tester. It generates the smoke stimulus that the XTR2 delivers directly to a smoke detector during testing. The cartridge works by releasing a controlled burst of smoke into the detector’s sensing chamber, triggering the detector to respond as it would in a real fire situation.

The Testifire XTR2 itself is a cordless, all-in-one testing tool designed to test both smoke and heat detectors without the need for separate equipment. When the smoke cartridge is activated, the XTR2 produces a rapid burst of smoke, which the testing head channels directly at the detector. This focused delivery is what makes the system efficient: you get a reliable, repeatable test stimulus every time without wasting cartridge capacity on ambient air.

The cartridge is separate from the heat testing function, which uses a different mechanism to reach temperatures up to 100°C. This means the number of smoke tests a cartridge delivers is independent of how many heat tests you perform in the same session.

How many tests does one XTR2 smoke cartridge provide?

A single XTR2 smoke cartridge delivers approximately 50 to 75 individual smoke tests. This figure is based on standard test durations and normal operating conditions. If each test runs slightly longer than usual, for example when a detector is slow to respond, the cartridge will be depleted faster and the total count will sit closer to the lower end of that range.

For practical planning purposes on a vessel inspection, it helps to think in terms of the number of detectors per zone and the size of the spaces being tested. A cartridge that yields around 60 tests is typically enough to cover a meaningful portion of a mid-sized vessel’s detector network in a single shift. Carrying at least one spare cartridge per inspection day is a straightforward way to avoid interruptions.

It is also worth noting that the XTR2 supports sequential and combined test modes, where smoke and heat are triggered in the same pass. Using combined mode does not increase cartridge consumption beyond what a standard smoke-only test would use, so it is a time-efficient option without extra cost per test.

How often should fire detectors be tested with the XTR2?

Fire detectors on vessels should be tested at intervals that align with your vessel’s planned maintenance schedule and the requirements set by your flag state and classification society. In general terms, industry practice points toward functional testing at least annually, with more frequent checks on detectors in high-risk or high-use areas.

The Testifire XTR2 supports this by making each test fast and documentable. Its automatic digital test reporting via the DT Connect app records results in real time and generates on-site reports, which is directly useful when you need to demonstrate compliance during port state control inspections or class surveys. Having a clear, timestamped test record for every detector takes the guesswork out of proving your maintenance history.

For vessels with older detection systems, more frequent testing is a practical safeguard. Detectors that are approaching the end of their service life may respond inconsistently, and regular testing with a calibrated tool like the XTR2 helps you catch those issues before they become a compliance problem at the wrong moment.

What happens if a smoke cartridge runs out mid-inspection?

If a smoke cartridge runs out during an inspection, smoke testing stops entirely until a replacement cartridge is fitted. The XTR2 itself continues to function for heat detector testing, so you can carry on with that part of the inspection while sourcing a new cartridge. However, any smoke detectors that have not yet been tested will remain unchecked until you resume.

This situation creates a real problem on vessels where port time is limited. An incomplete inspection can delay sign-off, hold up departure, or require a follow-up visit that adds cost and scheduling complexity. The straightforward fix is to plan cartridge stock based on your detector count before each inspection, adding a buffer of at least one spare cartridge per day of work.

The DT Connect app’s real-time recording feature is useful here as well. Because results are logged as you go, you always have a clear record of which detectors have been tested and which are still outstanding, making it easy to pick up exactly where you left off once a fresh cartridge is in place.

Where can you source replacement XTR2 smoke cartridges quickly?

Replacement XTR2 smoke cartridges are available through specialist maritime equipment suppliers who stock Testifire consumables. The key factors to look for are stock availability and fast worldwide shipping, since a cartridge shortage mid-voyage or during a tight port call cannot wait for a standard lead time.

Working with a supplier who understands maritime schedules makes a practical difference. A supplier with a large standing inventory and an established logistics network can get replacement cartridges to a vessel’s next port of call within a timeframe that fits your schedule, rather than one that fits a standard retail process. This is especially relevant for vessels operating on international routes where local sourcing is not always an option.

Ordering in small bulk quantities, rather than cartridge by cartridge, is also a sensible approach. It reduces the risk of running short at a critical moment and often simplifies the procurement process for fleet engineers managing multiple vessels at once.

How we help with Testifire XTR2 supplies and fire detector testing

We stock Testifire XTR2 equipment and related consumables and can arrange fast worldwide delivery to keep your testing schedule on track. Our team understands how port schedules work and responds with the urgency the maritime sector requires. Here is what we offer:

• Stock availability: XTR2 cartridges and accessories held in our Rotterdam warehouse, ready for immediate dispatch
• Fast worldwide delivery: Shipment coordinated to meet your vessel’s next port of call
• Technical advice: Guidance on cartridge planning, testing schedules, and compatibility with your existing fire and gas detection systems
• Broader support: As a specialist in maritime safety equipment, we can source related products across more than 100 brands through our global supplier network

Neem contact met ons op om te bespreken hoe we je kunnen helpen. Visit our Contact page to reach our team directly.