Psi-Tech, Mind Shield, Low Signature

[adam1234]

How do you play Psi-Tech and its interaction with Mind Signature or Low Signature enhancements?

For example, the Psitector Band (Psi-Tech22) sits on someone's head and identifies Psis without a resistance roll nor even an operator roll. Further, as written, it does not care about Mind Shield. Do you think it would ignore that? Do you add a resistance roll? Do you do something else?

Similarly, the Psi Scanner is the tech form of Psi Sense (Psionic Powers 22). It detects nearby psis with an electronics operation roll. Psi abilities can use the technique Hide Signature (Psionic Powers 41) to reduce the chance of Psi Sense being triggered. Hide Signature (or the Low Psychic Signature enhancement) mentions specifically "supernatural means" of detection. Do you count Psi Scanners (or other Psi-Tech) in that group?