Nem kontrolü çalıştığı halde vakumlu poşet ıslaktı.

-dığı halde / -diği halde is a common Turkish pattern meaning although, even though, or despite the fact that.

So çalıştığı halde means although it was working or even though it worked/was functioning.

In this sentence, the whole first part:

Nem kontrolü çalıştığı halde

sets up a contrast with the second part:

vakumlu poşet ıslaktı

So the structure is basically:

Although X was working, Y was wet.

Because Turkish often uses a subordinate clause before words like halde.

Here, çalıştığı is not the main verb of the sentence. It is a verb form used inside a dependent clause:

• çalışıyor = it is working
• çalıştığı halde = although it is/was working

So çalıştığı is part of a grammatical pattern, not just the ordinary present tense.

A rough breakdown is:

• çalış- = work, function
• -dık / -dik / -duk / -dük = a clause-forming suffix
• -ı / -i / -u / -ü = agreement/possessive-type ending here
• halde = in the state of, although

You do not need to translate each piece literally every time; it is best learned as the set phrase -dığı halde.

No, it is not the accusative object ending here.

In çalıştığı, the ending belongs to the clause form built with -dık. In this kind of structure, Turkish adds a person/agreement-type ending to the verbal noun.

So:

• çalıştığı here means something like its working / that it was working
• then halde turns that into although it was working

For learners, the safest way to understand it is:

• çalıştığı halde = although it was working

rather than trying to read the final -ı as a separate object marker.

Nem kontrolü is a noun compound.

• nem = humidity, moisture
• kontrolü = control

In Turkish, many noun+noun combinations are formed with the second noun taking a third-person possessive ending:

• su şişesi = water bottle
• otobüs durağı = bus stop
• nem kontrolü = humidity control / moisture control

So kontrolü does not mean the control here in the simple definite sense. It is part of the compound structure.

A very literal idea is something like its control of humidity, but in natural English that becomes humidity control.

It can depend on context.

In a sentence like this, nem kontrolü çalıştığı halde..., it most naturally sounds like:

• a humidity-control system
• a moisture-control function
• or some kind of humidity regulation mechanism

Because it çalışıyor / çalışmak — it works / functions — it sounds more like a system or mechanism than an abstract concept.

So a learner should understand it as something like the humidity control system/function.

Vakumlu comes from:

• vakum = vacuum
• -lu / -lü / -lı / -li = with, having, containing, or equipped with

So vakumlu means something like:

• with vacuum
• vacuum-sealed
• vacuum-type
• vacuum-packed, depending on context

Here, vakumlu poşet most naturally means vacuum bag or vacuum-sealed bag.

This suffix is very common in Turkish:

• tuzlu = salty / with salt
• şekerli = with sugar / sweetened
• camlı = with glass / glass-fronted
• düğmeli = with buttons

So vakumlu poşet is literally something like a bag with vacuum.

Islaktı is the normal way to say was wet.

It comes from:

• ıslak = wet
• -tı / -ti / -tu / -tü = past form of the copula, giving was

So:

• ıslak = wet
• ıslaktı = was wet

This is more direct and neutral than ıslak oldu.

Compare:

• Poşet ıslaktı = The bag was wet
• Poşet ıslak oldu = The bag became wet

So ıslaktı describes a state in the past, while ıslak oldu emphasizes a change into that state.

Yes, in a way.

Turkish often does not use a separate word for is/was with adjectives. Instead, it adds endings directly.

So:

• Poşet ıslak = The bag is wet
• Poşet ıslaktı = The bag was wet

You can think of -tı here as carrying the meaning of was.

This is very common with adjectives and nouns in Turkish.

Yes, a close alternative would be:

Nem kontrolü çalışmasına rağmen vakumlu poşet ıslaktı.

This also means Although the humidity control was working, the vacuum bag was wet.

The difference is mostly grammatical style:

• çalıştığı halde = a very common concessive structure
• çalışmasına rağmen = another very common concessive structure, often felt as despite its working

Both are natural. Learners should know both patterns.

Yes, the order could be different, but the version with the concessive clause first is very natural.

Current order:

Nem kontrolü çalıştığı halde vakumlu poşet ıslaktı.

This is like:

Although the humidity control was working, the vacuum bag was wet.

Turkish often places background information or contrast-setting material first.

A reordered version such as:

Vakumlu poşet, nem kontrolü çalıştığı halde ıslaktı.

is also possible, but it gives a slightly different emphasis, focusing more on the bag.

So the original order is natural and probably the most neutral.

Poşet usually means bag, especially a light bag, plastic bag, pouch, or packaging bag.

In this sentence, because it is modified by vakumlu, it likely refers to a vacuum bag or vacuum-sealed pouch/bag used for storage or packaging.

So depending on context, English could say:

• vacuum bag
• vacuum-sealed bag
• vacuum-sealed pouch

The Turkish word poşet itself stays fairly broad.

The sentence has two parts:

1. Nem kontrolü çalıştığı halde
   = Although the humidity control was working

2. vakumlu poşet ıslaktı
   = the vacuum bag was wet

So the pattern is:

[concessive clause] + [main clause]

More abstractly:

[Even though X happened/was true] + [Y was true]

This is a very common Turkish sentence type, and learning -dığı halde as a chunk will help a lot.