Features: * Frequency meter / Tacho or linespeed meter * Red LED display, 14.2 mm high * Soft buttons, easily operate * Measuring range: 4 digit (9999), 6 digit (999999) * Measuring frequency is selectable: 0.11~1KHz / 0.11~10KHz (up to 50K Hz can be ordered) * Frequency and tacho can be converted by software * Decimal point,modulus and display unit can be set freely; * Division modulus range: 4 digit (0~9999) or 6 digit( 0~999999) * Multiplication modulus range: 0.001~9999 or 0.00001~999999 * Refresh time and zero-return time can be set within 0~9s. * Power fail holing function, up to 10 years. * With or without analog output:0~20mA or 4~20mA * Options sizes:48?8mm,72?2mm,48?6mm, * Relay and transistor output at the same time ( can drive solid state relay) TEL: 0086-760-6208640 FAX: 0086-760-5549680