ACE Flameproof RPM Indicator holds an Aluminium LM-6 Body with 1 High Super Bright Display Software Calibration along with a Calibration Certificate traceable to E.T.D.C.( NABL Accredited Laboratory). The RPM Indicator has two Push Buttons for START/STOP and 10 turns potentiometer for changing the drive RPM. This flameproof RPM pointer can likewise be given a selector switch rather than a potentiometer as an option. Features of RPM Indicator: 4 Digit Red 7 Segment LED Display 1” High Super Bright This Flameproof Indicator comes with RS 485 Modbus Protocol Communication Programmable between 0 to 6000 RPM Optionally Customized Measuring Range