Blackstone HS-819

Dental practices with Class B sterilisers are the main users, because handpieces and other hollow instruments depend on steam reaching their internal channels. At the start of the day, a nurse places a fresh strip in the capsule, sets the tube in the empty chamber and runs the steriliser's test cycle, then reads the strip before the first load goes in.

The coil exists to make that test demanding. Steam has to drive air out along the full length of a narrow tube, so a steriliser that turns the strip black shows the kind of air-removal lumen instruments need. A partly yellow strip flags the problem before instruments are processed for that day's patients.

Podiatry clinics, minor surgery suites in general practice, oral surgery clinics and veterinary practices run the same routine wherever cannulated or hollow instruments are processed. Tattoo and piercing studios sterilising hollow grips and tubes use it too.

Decontamination leads also run the test after a service visit or repair, and record each result in the steriliser logbook. Training clinics use the visible colour change to show students what air removal means in practice. Practices running more than one Class B steriliser test each machine separately, so their strips are used up faster. Newly installed or relocated sterilisers go through the same test before they return to service, giving a baseline result on day one.

The kit asks nothing of the room: no power, no cables and no software.

Sterilisers not designed for hollow loads, and teams that need electronically logged test results, need a different solution.

A direct challenge for hollow loads

The coil replaces lumen instruments, so the test shows whether steam penetrates a narrow channel.

A result read at a glance

Yellow to black is easy to read, so the outcome is clear as soon as the capsule opens.

One tube for 100 tests

The helix tube is reusable, so only the strips are consumed.

100 strips per kit

Each kit carries enough strips for 100 tests.

Nothing to power

With no electronics, the kit needs no charging, cables or calibration.

Quick to run

A test takes one strip and one cycle, so it fits before the first load of the day.

Faults found before loads go out

Run before the first load, a partly yellow strip flags a penetration problem while instruments are still waiting.

Made in Italy

The kit is manufactured in Italy.

Helix tube

A long, narrow tube forms the test channel.

Coiled form

The tube is wound into a coil.

Capsule end

A capsule closes one end and holds the strip.

Open inlet

The other end stays open for steam to enter.

100 indicator strips

The kit includes 100 strips.

Yellow-to-black change

Strips change from yellow to black when steam reaches them.

One strip per test

Each test uses a single strip.

Reusable tube

The same tube serves every test in the kit.

For Class B sterilisers

The kit is intended for Class B steam sterilisers.

No electronics

No power or charging required.

Italian manufacture

Production is in Italy.

Boxed kit

Tube and strips come together in one box.

For a practice or clinic running a Class B steam steriliser on hollow instruments, the HS-819 directly answers whether steam reaches the end of a narrow channel. Its mechanism is simple: a long coiled tube with a capsule at the closed end, a strip that turns from yellow to black only when steam reaches it, and one reusable tube for 100 tests. The limits come down to three. No CE or UKCA position is evidenced for this kit. It tests steam penetration in a test cycle and does not prove that a given load is sterile. Its 100 strips are consumed one per test, while the tube serves all of them.