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Chapter 1. INTRODUCTION
Introduction
MQV high performance, digital mass flow controllers with advanced functions have
been developed for the general industrial application. They feature flow rate control
with high speed and wide rangeability. MQV controllers integrate three component
technologies: the ultra quick response µF (Micro Flow) thermal flow sensor, made
with proprietary Azbil Corporation technology, a proportional solenoid valve, and
advanced actuator control technology. Integrating these technologies has achieved
a high-speed control with low differential pressure.
RS-485 device
(for models supporting
optional RS-485
communications
function)
Potentiometer (sold separately)
for setting ow rate
Controller
(e.g. SDC25/26)
24 V DC power supply
(e.g. WN790A)
MQV
Separate display unit
Front cover for
separate display
(sold separately)
AC adapter
(sold separately)
Cable with dedicated
connector (sold separately)
Device Configuration
Features
• High-speed controllability
Fast response of 300 ms or less*
(500 ms for the MQV9005/9020, 700 ms for the MQV0050(J, K), MQV0200, and
MQV0500.)
* Response time is the time required for the controlled flow rate to reach ±2 % of the
set value, starting from the fully closed state or from when the set value is changed
during control.
• Low differential pressure operation
MQV controllers can operate at a low differential pressure of 50 kPa or less.
• Wide control range
Wide control range of 1 to 100 % FS (2 to 100 % FS for the MQV9005)
• Wide product line-up
There are two types of models, those with integrated display and those with
separate display. On models with separate display, the display unit can be
detached to allow remote operation via the dedicated 2 m cable.
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