DUFF and Macintosh has released the VISTA-spinner flow indicator combining the advantages of a spinner flow indicator with the cost savings of a gun-metal glass domed flow indicator.
The VISTA-spinner can be installed at any angle. Threaded connections of 1/4" BSPP (8mm) to 1" BSPP (25mm), the VISTA-spinner satisfies most cooling and flow requirements.
The main advantage of the VISTA-spinner is that it is capable of bi-directional flow indication - something the bouncing ball and flap-style indicators cannot do. Duff and Macintosh 02 9482 1411.