The RS Series are small panel mount frequency, rate and Line Speed meters. Their programmable scaling makes them capable of dis-playing, frequency, RPM and line speed as well other units of rate or flow.
The PS2-R... is a 5 digit ratemeter that requires only one pulse per unit of measure (no gears needed just one pulse per shaft revolution). Rate can be displayed in units per second, minute or hour
The PS2-RP... is a 5 digit, programmable, two preset, scaleable ratemeter.