What is this circuit component?

[Carl-NC]

It looks like a 22 MegaOhm resistor partially hiding beneath the mystery component.
I'm mentioning it, because I've never seen such a high resistor value on a "normal" PCB, just in high voltage circuits.

Also could be the feedback R in a Pierce oscillator. However, I don't see any shunt caps.

[Polymer]

This has sparked my curiosity. I agree that it's most probably a tuning fork resonator. 220.0 kHz perhaps?



To leave nothing out, there is a remote possibility it may be a resistance temperature sensor.



It looks like a 22 MegaOhm resistor partially hiding beneath the mystery component.
I'm mentioning it, because I've never seen such a high resistor value on a "normal" PCB, just in high voltage circuits.

Link: http://www.directindustry.com/prod/s...70-499111.html

[Carl-NC]

Looks like a tuning fork crystal. The glass window allows it to be laser trimmed.

[rickb]

Is that a ceramic package with a glass window? Could be a crystal resonator. A better straight on photo, perpendicular to the window would be nice. 8838 looks like a date code, 38th week of 1988. Need a better view of the second line. Anything on the back?

Rick

[Arthur-Canada]

Anyone know what is this component labeled 8838?