Martindale PSI3000 Phase Rotation Meter 
The Martindale PSI3000 (clockwise version) is the ultimate 3 phase sequence (rotation) indicator. It combines an easy to follow clockwise rotating disc with fault indicators showing if any of the phases are down.

The disc continues to rotate after disconnection, giving more time to identify the phase sequence on three phase electrical systems. A velcro strap allows the unit to be attached to conduits etc. which leaves your hands free to use the test leads. Part No: Martindale MARPSI3000 - Clockwise

Model PSI3000 has clockwise disc rotation
Model PSI3300 has anti-clockwise disc rotation
For use on systems from 100V to 600V phase to phase, 40Hz to 60Hz
Neon indication from 100V phase to phase (RMS)
Rotating disc operation from 200V phase to phase (RMS)
Fitted with GS38 fused prods with 1 meter leads: 3 colour coded easy fit crocodile clips are included
Operating Temp: -20°c to 40°c
Overvoltage: CAT III/600V
Overvoltage: CAT IV 300V
Complies with: GS38 and BS EN 61010