Temperature sensor for below -55'C

[alberteerj]

Anyone know any type/model of Temperature sensor component that can measure temperature for below -55'C ?

What i have searched so far, mostly the normal sensor like LM10 just can operates not lower than -55'C.

 

[FvM]

RTD(Pt100/Pt1000) or thermocouple is the way to go.

 

[alberteerj]

Any other type that are just component itself only? without a ready made module

 

[karesz]

Hali alberteerj,
Datasheet tells us some things over "Specified" temperature range!
This is not equivalent with sentence as: "It can work strictly only in this temp.-range", means only, that the given datas are garanted in the descripted/specified Temp-range!
K.
What is your interested lowest temperature pls?
We have applyed (so 25 years ago) for ex. AD590s for only 5 Kelvin!_it was as typical a military type only (-55-- +125C).
I must tell, it was every times only for short time in function, but not only one time.

I think, you must take a thermocross/industrial sensor or a typical PT element & if you arent so extreme deep on temp: it will function & you must calibrate it self.
K.

Added after 3 minutes:

Ad590 was very welcome as because it has an 1uA/K current modus.
If you put an 1K- you can measure direct the "Kelvis in mV"...

 

[alberteerj]

My lowest temperature may reach until -100'C.
Because i'm doing some temperature sensing for some fridges that are operate below -55'C.

Basically i have my own ready develop MCU board. I just need an external temperature sensor to input the voltage level or something to my MCU board.

Currently i'm already had one temperature sensor that are working fine with my MCU board and the sensor operating range is -55'C until 125'C.

But right now i need a lower range temperature sensor for my board =)

Added after 3 minutes:

Hali alberteerj,
Datasheet tells us some things over "Specified" temperature range!
This is not equivalent with sentence as: "It can work strictly only in this temp.-range", means only, that the given datas are garanted in the descripted/specified Temp-range!

If for this case the LM35 lowest temperature can reach until what reading?

 

[FvM]

A minimal datasheet literature is suggested! LM35 datsheet shows typical (unspecified) performance down to -75 °C.
Particularly, you can see a sharp bend at ~ -65°C, so it's very unlikely working at -100 C. There's a better chance to get
almost linear behaviour with other types, e.g. the said AD590.

Personally, I don't see a larger effort when using a RTD in a simple voltage divider circuit, provided the ADC resolution
is sufficient. You need to linearize the measurement digitally, but have completely specified behaviour. In contrast to an IC sensor
with unknown error characteristic, you can perform a simple two-point calibration to eleminate ADC and reference resistor errors.

 

[karesz]

...RDTs have completely specified behaviour. In contrast to an IC sensor with unknown error characteristic...

I agree completly, I wished to tell only, that some other limits are possible as from "garanteed/specified ranges" to read/think is...
I did write too, that we experimented only with that & it was not an industrial development or product.
Semiconductors in so extrem applications will (with time surly) become metallic layer delaminations & bonding resistance problems:-(...
K.