Cylinder and inductive sensors in applications with cooling lubricants, suitable sensor types and how to find them?

Cooling lubricants are used in most application cases in metalworking.

This type of lubricant must perform a lubricating and cooling function at the same time. Moreover, the fluid is supposed to remove the metal shavings created during processing. These lubricants must possess particularly strong corrosion protection characteristics to prevent corrosion at the processed parts, tools and processing machine surfaces.

Furthermore, the cooling lubricants must contain special additives that prevent excess wear and tear on the tool or premature tool damage.

(Information from https://kluthe.com/en/products/cooling-lubricants/) 

That shows us that cooling lubricants are a strong chemical cocktail that can contain mineral oils and a lot of different additives like emulsifiers, binders, corrosion inhibitors, antifrothing agents, and bactericides.
Some of them can be very challenging for our sensors.

To find the suitable sensors choose at the product family page "special applications" and select "Zones with coolants and lubricants":
https://internal.sick.com/de/en/inductive-proximity-sensors/c/g253054?q=:Def_Type:ProductFamily

Resistant against cooling lubricants should be sensors in full metal or full plastic (or combination of both) housings like
MPS-C,
MPS-G,
IMA,
IMB,
IMC,
IMS,
SAM,
IQV,
IMP,
IMM,
IMS,
IQ,
IMR,
IMF,
IMI,

Not resistant against cooling lubricants are hot melt filled sensors, where the hot melt filling is reachable by the cooling lubricants like
MPS-T (in the LED window you can see and reach the hot melt filling),
MZ2Q,
IME,
MZN,