The PosiFlow sensor
will verify that your metering pump is truly moving
liquid and has not lost prime. Designed for the Iwaki
ES, EH & EW series pumps, the PosiFlow detects the
flow of liquid output by the pump without any moving
parts. The standard flow path of the pump is kept so
liquid does not have to go through any gears or move a
magnet to actuate a pulse in the sensor. This
eliminates any concern of plugging or jamming of the
sensing mechanism. The output signal of the PosiFlow
Sensor is an open-collector contact closure
corresponding with each flow pulse. Additionally, a
visual green LED is mounted on the top side of the
sensor. This is always ON to indicate power and will
briefly flash OFF in sync with each output signal. To
function accurately, the sensor requires 30 psi of
back pressure. If an application has little or no
system pressure, an upgrade spring for the standard
injection check valve, or a separate back pressure
valve, is available to ensure the sensor functions
properly. The PosiFlow will send out a signal with
every stroke as long as there is liquid flow. If the
pump becomes air-locked or if the pump is in a
dead-head condition, the sensor will no longer output
a signal. Also, if large volumes of air are in the
line during normal pumping operation, the PosiFlow
will temporarily stop signalling flow until normal
operation returns.
•
12 VDC
power source via WebMaster, or pump with
“Y” module or external power source
• mounts directly into Iwaki vent valve
• requires minimum of 30 psi total back pressure
• LED indicator
• output signal 100 mS
