Can somebody tell my what is the value of the resistor with αF SMD resistor coding as shown in figure below?

enter image description here

Thanks in advance

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    \$\begingroup\$ that doesn't seem to be a resistor at all. \$\endgroup\$ – Marcus Müller Mar 5 at 9:29

The product in the photo is Gravity: Analog Current to Voltage Converter.

As for the components (\$\alpha F\$) in the question, I've checked the schematic, they are shown as R2 and R5 but no details have been given.

Most likely they are protection elements: could be a fuse or even a resettable (PTC) fuse (I'd prefer the latter, though, since the product is designed for 4-20mA.). They can even be from German company Alpha-Therm.

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