header tank sensor

Some Alfa Romeo 33's and 164's should have the same level sensor but has a shorter rod. They are not separately sold so you would need to buy the whole header tank. I have not tried it myself (yet)

https://www.ebay.co.uk/itm/Alfa-Romeo-33-Alfasud-Sprint-Coolant-Expansion-Tank-with-level-sensor-60585389-/182732634063

https://alfa-restoration.co.uk/shop/product_info.php?products_id=1024

 

I luckily have a brand new in box and original header tank Ferrari float sensor.

I also just recently fitted a brand new Ferrari washer bottle sensor. Both sensors now NLA & rare as hens teeth. I may try to get them 'patterned', as it will only be a matter if time they will fail again being submerged in water.

Worse case is you could disconnect the failed sensors and short the wiring out (washer bottle, not sure on header tank if it's a make or break switch) to complete the circuit to extinguish the warning lamps.

Alternatively there are generic stainless steel vertical float switches available on Ebay, which I'm sure could be adapted to suit and a bung made up easily with some rubber/plastic.