Frequency sensor/transmitter/transducer input:75-450V;35-80HZ output:0-5V;4-20mA;0-5V,4-20mA;0-5V,0 ... -5KHZ power:DC15V,DC12V Our requency sensor/transmitter/transducer ... kinds fo A/D converter,computer system.product frequency transmitterGrade0.5&1.0modelA5F-X-O-Y-S 0 ... -5V;4-20mA;0-5V,4-20mA;0-5V,0-5KHZpower supplyDC24V,DC15V,DC12V,DC±15V,DC±12V frequency transmitter