Metravi 96x48 mm RPM Meter is a machine used to count digital event values. 96x48 mm RPM Meter has a range of 1 to 999999 counts. The RPM Meter has four input modes: proximity switches, potential-free contact, 5 to 30VDC Voltage pulse, and a 230V AC Mains Pulse. The device is made in India. Metravi has been a reliable manufacturer of industrial instruments, and this device by Metravi has a sensor voltage of 12V at direct current and a current rating of 30 microamperes. The counting speed of the device is programmable. Product Attributes: Range: 1 to 999999 Counts Sensor Voltage: 12V DC 30mA Max. Display: 6 Digits Red LED Display Control Input: Hold (Optional) Counting Speed : 0 to 3 / 30 / 100 / 1000 / 2500Hz Memory Retention: Non-Volatile (E2 PROM) up to 10 years