Digital Tachometer: Digital tachometers developed by Twintech are used by leading industrial houses such as Cummins India Ltd and manu other samll scale industrial units for many years. Salient Features: Supply: 24 V DC Input: Sine-Wave frequency of amplitude 2.0 to 30 volts RMS Maximum Count: 19,999 RPM Accuracy: ±1 RPM Cost effective features: Protection from Reverse Polarity supply 24 V DC Withstands vibrations of Diese Engine Panels Ambient Temperature: 70 o C Who are using it ? Cummins India Ltd. Era Instruments Valco Industri