Alarming Device when in Low temp Liquid Contact for level monitoring

I have a Tank that I fill with Liquid Nitrogen (-196 C) I want to have a Probe that I can stick down in the tank and trigger a normally open NO/normally closed NC alarms at different depths in the tank.

It has to run on a battery and last longer that 1 year (standard battery preferred)
Essentially when the liquid nitrogen drops a the top of the tank one alarm should be triggered and remain triggered until the liquid is filled. But the liquid can drop further down and hit the next alarm point and then trigger again.

All the wires/electronics can be routed to the outside of the tank with only the either RTD or other sensor exposed to the -196 C


Potentially I would want to have this project grow to connect to 4G network and text/call/email me when alarms occur also store data potentially too, but first this Probe/sensor level should be tested by me. thanks
About the recuiter
Member since Nov 11, 2022
Rory Millikin
from Cagayan Valley, Philippines

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