Handheld or Inline? Choosing a TIJ Platform That Fits the Job

A handheld coder goes to the product. An inline station waits for the product to come past.

That single difference decides throughput, code quality and who operates the machine — and it is almost always answered before any technical comparison starts. Everything below follows from where the movement is.

The one question that decides it

Start with the product, not the printer. An inline station prints while the product moves past a fixed head; a handheld unit prints while a person carries the head to the product. Almost everything else follows from where the movement is.

If the product can be presented to a fixed position at a predictable speed, an inline station will usually produce the more consistent code. If the product is too large, too awkward or too infrequent to bring to a station, a handheld is not a compromise; it is the correct tool. Everything below is a consequence of that first answer.

What a handheld unit is good at

A handheld coder earns its place where the product does not move on a conveyor. Cartons on a pallet, cable drums, large mouldings, assembled frames, rework and re-labelling in a warehouse: the work exists, but it arrives in ones and twos rather than as a stream.

The two units we supply cover the common range. The 12.7 mm model prints a character height of 1.2–12.7 mm on a half-inch cartridge; the 25.4 mm model covers 2–25.4 mm on a one-inch cartridge. Both print at 600 dpi, print-mode dependent, and both use an internal encoder wheel to match firing to the speed of the operator’s sweep rather than to a line encoder — which is what makes hand-speed printing legible at all. Throw distance is 2–5 mm, and 1–2 mm gives the best placement accuracy.

Two limits are worth stating plainly. Handheld units are designed for dry indoor use and are not washdown-rated enclosures. And stitching does not apply: one handheld equals one cartridge, so a code that needs 76.2 mm of height is not a handheld job. See the 12.7 mm handheld and the 25.4 mm handheld for the full specification.

What an inline station is good at

An inline station earns its place where the product already moves at a controlled speed, and where throughput makes a manual operation impractical. Filling and packaging lines, extrusion lines, labelling lines and warehouse sorters all present the product to a fixed point, which is exactly what a fixed head needs.

Our inline platform takes one to four printheads in a vertical stack, stitched into a single image. A half-inch head covers 12.7 mm of print width and a one-inch head 25.4 mm, so two one-inch heads give 50.8 mm and four give 76.2 mm. Character height runs from 6.35 mm with a single head to 76.2 mm with four. Resolution is 600 dpi as standard and up to 1200 dpi on higher-resolution configurations. Throw distance is 0.5–8 mm.

Triggering is where an inline station differs from a handheld in kind: photocell product detection, encoder synchronisation, or timed firing. The enclosure is chosen to the environment rather than fixed — IP54 to IP67 depending on configuration, for dust, humidity and washdown exposure. The inline station page has the full configuration table.

The variables that actually move the decision

Five questions, in the order they change the answer.

Can the product stop, or be presented? If it cannot, the inline station has to print on the fly at line speed with an encoder, and that is a normal configuration — but it is a different specification from a station that prints while the product indexes.

How much print width does the code need? Print width is a ceiling, not a preference: a 25.4 mm cartridge cannot be squeezed into a 12.7 mm seat. The print width decision works through that arithmetic, including the QR code trap where a dense code needs more room than its text suggests.

What is the throughput, in units per hour? A handheld operation costs one operator sweep per unit. That is fine at 400 cartons a shift and unworkable at 400 an hour.

What is the product’s orientation and access? A fixed head needs the product presented flat and at a consistent distance. Curved, recessed or oddly shaped products may simply not present a printable face to a station, while a handheld can be angled to the surface the operator can actually reach.

Who maintains it? A handheld needs charging and is operated by whoever is doing the packing. An inline station sits inside a production line, so it needs an owner on the maintenance side, plus the enclosure rating the washdown routine demands.

What the boundary is on what we supply

This is worth being explicit about because it changes what we can promise.

We make the TIJ cartridges and their inks. The printers are not our own manufacture: the handheld and inline platforms are supplied together with specialist equipment-manufacturing partners, so cartridge and platform are specified as one system rather than as two purchases. The printhead assembly inside the cartridge is bought in from specialist printhead manufacturers and qualified by us rather than manufactured here. Our manufacturer page sets out that split in more detail.

The practical consequence for a buyer is simple: we can specify the ink, the cartridge, the print width and the platform together, and we can print your code on your material before you commit — but a claim about our own printer factory would be false, so we do not make one.

How to specify either one

Send the same five things whichever platform you are leaning towards:

1. The product, with a sample or a photograph of the face that gets printed.
2. The code content and its size, including any QR or Data Matrix.
3. The throughput, and whether the product can stop or index.
4. What happens to the mark afterwards — a chilled cabinet, a rub, a solvent wipe.
5. The environment: dry indoor, dusty, or washed down.

With those, the platform usually selects itself, and the remaining question is which ink system and print width to pair with it. If the job is a date, batch or lot code on a pack, date and batch coding covers the content side; if you already know the platform and only need the consumable, the cartridge range is the shorter path. Anything unclear, send us the details and we will come back with one recommendation rather than a catalogue.