Are metal tipped thermostats reef safe?

[jiffyjhn]

Just received a thermostat for new office tank I'm setting up:

Just as I'm opening the package it occurred to me the probe is metal. Is it reef safe? I'm using a similar one in my other 4 month old tank, and seems no issues so far. Curious if the metal probe could be an issue long term.

Thanks

 

[Llyod276]

As long as it's stainless steel. Also the purity of the(zinc or tin[?] content) stainlessness. It should be good to go.