MAGANAFLUX Models ZA.37W, ZA.37E and ZA.37S Zyglo Flourescent Penetrant System Operating Manual. MAGANAFLUX Models ZA.37W, ZA.37E and ZA.37S Zyglo Flourescent Penetrant System Operating Manual. Includes copies of the maker's Sales and Technical Specification catalogues. Manufacturers: Magnaflux Models: ZA.37W ZA.37S ZA.37E ZA37W ZA37E ZA37S Contents: Operators Manual