Fluid flow meter

A meter for measuring flow of fluid comprising, in combination:

• a housing defining a metering chamber;
• flow rate responsive means rotatably mounted in said chamber;
• a first rotary element of non-magnetizable material drivingly connected to said flow rate responsive means to be rotatable about a rotational axis;
• indicating means supported by said housing;
• a second rotary element of non-magnetizable material connected to said indicating means and mounted to be rotatable about said rotational axis
• two magnetically separated first permanent magnets each provided on said first rotary element and disposed symmetrically with respect to said rotational axis with their respective axes of magnetisation extending substantially parallel thereto and being oppositely directed;
• two magnetically separated second permanent magnets each provided on said second rotary element and disposed symmetrically with respect to said rotational axis with their respective axes of magnetisation extending substantially parallel thereto and being oppositely directed;
• and
• a wall member of substantially non-magnetisable material extending between said first and second rotary elements;
• each said permanent magnet comprising a pair of similarly poled physically separate, component permanent magnets having respective planar surfaces abutting against one another in a plane extending substantially parallel to said rotational axis.