This application uses for tanks instead of
one very big pump. A big one is expensive and difficult to control its speed
without using expensive equipment.
Furthermore, the AS4V has deadband (hysteresis) capability which can be
programmed independently for each setpoint. Setting deadband for each control
setpoint can eliminate  unwanted
pump cycling ON and OFF sporadically around the setpoint, even when the
water level changes continuously.
We also have Temperature Input versions of AS4V: model AS4T, T/C input,
and model AS4R, RTD input. T/C and RTD types are programmable, and setpoints
can be specified in actual temperature unit. |
The
Quad DC Limit Alarm model AS4V is suitable for controlling the level of
a distribution tank in water treatment system.