... , strong anti-disturbance capability, pretty appearance, etc.JMX series electronic meter counter/linear velocimeter can be used widely in the industries ... , chemical engineering, metallurgy, etc, is able to operate for the meter counting display, control and displaying the linear velocity of the ... : For TTL circuit and so forth ( low level VL=0~1.3V, high level VH=4.5~30V). thefrequency can be selected ...