Principle of operation
The Oval Gear meters are positive displacement flowmeters
where the passage of liquid causes two oval gears to
rotate within a precision measuring chamber and with each
rotation a fixed volume of liquid passes through the meter.
Magnets embedded within the gears initiate a high resolution
pulse train output. The pulse output can be wired directly
to process control and monitoring equipment or can
be used as an input to instruments supplied with or fitted directly
onto the meter.
The flowmeter is available as a blind transmitter
with pulse output capable of interfacing to most monitoring
and control instrumentation or the meter can
be fitted with or supplied with instruments such as
totalizers, rate totalizers or batch controllers. These
instruments also have monitoring and control output
options including 4-20mA, scaled pulse, flowrate
alarms and batch control logic (preset metering)