Outside Air Temp Sensor

I don't know how you define best. If you are only concerned with accuracy, then the best will not be the same as if you are only concerned with response time, range, size, reliability, weight, or cost. And if you are concerned with a combination of factors you may want to determine the relative importance of each to aid you in making a good selection.

Go here:Search GlobalSpec

Type in "air temperature sensor".

Have you done this?

I don't think you have done any serious looking, yet.

You might find something here....

http://www.aircraftspruce.com/menus/in/temp.html

Some of the more common choices are:
1) thermocouple
2) RTD (resistance temperature detector)
3) thermistor
4) ICTD (integrated circuit temp. detector)

The avionics "box" may dictate which type is compatible, or may accept multiple types. I don't know what the most usual standard is.

we have standard part, they are working on TSO and TSO part nomber for sensor.

but i want find some of temp sensor and read their datasheet and manual and be familier with their company before they give that rule.

thank you indeed,all of you.

first: for me accuracy is more important and then response time, range, size, reliability, weight, or cost beacouse this is an experimental aircraft.

second:this is an indicator not a sensor .....http://www.aircraftspruce.com/menus/in/temp.html........i need something like that...........http://www.specsensors.com/oat.asp

third:do you know an especial company how made a sensor for aviation??it will be help

I'm confused.

You say, "second:this is an indicator not a sensor "

Then you say, "do you know an especial company how made a sensor for aviation"?

Good luck.

sorry .mr.SolarEagle suggest an indicator , not sensor.

so i want clear it to everyone what i mean , so i refer pages that incoude the sensor. look at this below page that i under line and bold them:

i wrote "this is an indicator not a sensor===>go to this page===>http://www.aircraftspruce.com/menus/in/temp.html

i need something like that===>go to this page===>http://www.specsensors.com/oat.asp"

do you understand now?

Help us helping You by answering following questions:

What accuracy/uncertainty You are willing to get? 1deg, 0.3deg, 0.1 deg? ..

What speed range Your aircraft will have?

May be Your box has already inputs for temperature sensor/s? Read instruction - are there Thermistor sensors, Platinum Sensors, thermocouples acceptable?

Or You are bulding/plannig Your own box?

What You should concern:

1. sensor case should be solid, with aerodynamic shape, to avoid heating by air movement, and withstand micro crashes with flies, small birds, dirt, sand, gras.

2. should have shield from direct sunlight.

3. should be screened from electrostatic (there are charged particles in air) and lightning.

May be You could find used, working aircraft temperature sensor at ebay.com or something like this, and adopt.

The sensors You mentioned at http://www.specsensors.com/oat.asp

are thermistor type. Data sheet (kurve Z = R(T) curve) You can get from supplier.

They could be used inside. For outside I would add additional aerodynamic shape case.