Der Temperaturfühler liefert Werte für die Röstkurve.

Because Fühler is a masculine noun in German, so its dictionary form is der Fühler. The article der here shows:

• masculine
• singular
• nominative case (the subject of the sentence)

Since Temperaturfühler is a compound noun, the grammatical gender usually comes from the last part of the compound. The last part is Fühler, so the whole word is masculine: der Temperaturfühler.

Temperaturfühler is a compound noun made of:

• Temperatur = temperature
• Fühler = sensor, probe, feeler

So literally it is something like temperature sensor or temperature probe.

This is very common in German: instead of using several separate words, German often joins them into one long noun.

Liefert is the 3rd person singular form of liefern.

Basic meaning:

• liefern = to deliver, supply, provide

In this sentence, it does not usually mean a physical delivery like a package. It means something more like:

• provides
• supplies
• outputs

So Der Temperaturfühler liefert Werte means the sensor provides / outputs values.

In a normal German main clause, the finite verb usually comes in second position. This is called the V2 rule.

Here the sentence is:

• Der Temperaturfühler = position 1
• liefert = position 2
• Werte für die Röstkurve = the rest

So the structure is completely standard for German:

• Subject + verb + rest

German often leaves out the article when speaking about things in a general, non-specific way.

So:

• liefert Werte = provides values / outputs readings

This sounds natural when the values are not being identified as a specific set already known in the conversation.

If you said liefert die Werte, that would sound more like:

• provides the values
• a specific set of values already known or expected

Werte is in the accusative plural because it is the direct object of liefert.

The verb liefern is acting on something:

• The sensor provides what?
• Werte

Since Werte is plural, the nominative and accusative forms look the same here:

• nominative plural: Werte
• accusative plural: Werte

That is why there is no visible ending change on the noun itself.

The preposition für always takes the accusative case.

So:

• für + accusative

The noun is die Röstkurve:

• Röstkurve is feminine
• feminine accusative singular is also die

So:

• für die Röstkurve = for the roasting curve / for the roast profile curve

Röstkurve is another compound noun:

• rösten = to roast
• die Kurve = curve

So Röstkurve means roasting curve or roast profile curve, depending on context.

In technical or coffee-roasting contexts, it usually refers to a graph or curve showing how temperature changes during roasting.

The ö is just part of normal German spelling. It comes from the verb rösten.

Related forms:

• rösten = to roast
• Röstung = roasting
• Röstkurve = roasting curve

English and German are related languages, but their spelling developed differently. So you should think of ö as a normal German vowel, not as a special decoration.

If you cannot type ö, German often allows:

• oe instead of ö

So Röstkurve can be written as Roestkurve if necessary, though Röstkurve is the standard spelling.

In German, all nouns are capitalized.

So in this sentence:

• Temperaturfühler
• Werte
• Röstkurve

are capitalized because they are nouns.

This is one of the most noticeable differences from English, where only proper nouns are usually capitalized.

Yes, that is very natural.

Because Werte can mean:

• values
• readings
• data points

And liefert can mean:

• delivers
• supplies
• provides
• outputs

So depending on the technical context, possible natural English versions include:

• The temperature sensor provides values for the roasting curve.
• The temperature sensor supplies readings for the roasting curve.
• The temperature sensor outputs data for the roasting curve.

They are not all word-for-word identical, but they can all fit the German sentence well.

Yes. The sentence sounds fairly technical and matter-of-fact.

Reasons:

• Temperaturfühler is a technical noun
• liefert Werte is a common technical way to describe what a device does
• Röstkurve sounds like domain-specific vocabulary, especially in roasting or industrial settings

So this is the kind of sentence you might see in:

• a manual
• product documentation
• software interface text
• technical training material