Manual – Starflow QSD Model 6527B and 6537A
Unidata Manual - 6527B and 6537A Starflow QSD User Manual 08 05 2023.docx
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2. INTRODUCTION
The 1
st
generation 6527 Starflow QSD Instrument measures water velocity, depth
(ultrasonic) and temperature. The Starflow QSD – 2
nd
generation has been enhanced to
include depth measurement using the hydrostatic pressure method (6527B Starflow QSD),
electrical conductivity (6537A Starflow QSD), and a tilt sensor that is useful for installation
and site monitoring. These models come standard with both SDI-12 and RS-485 (Modbus
RTU) interfaces.
The capacity of the instrument to measure the water conductivity is unique. It allows the
instrument to determine not only the water velocity, flow, and volume but also an indication
of the water quality. The conductivity measurement can also be used where existing
techniques for measuring water quality are unsuitable or too expensive. By using Digital
Signal Processing (DSP) techniques, the Starflow QSD can perform in a wide range of
environments. It is used to measure flows and water conductivity (6537A) in pipes, channels,
and small streams. It can operate in a range of water qualities, from fresh streams to primary
sewage channels.
The electrical conductivity feature of the 6537A instrument empowers the user to detect
unusual waste dumping/agriculture runoff that is not visible using current flow sensors. The
pressure depth sensor allows the instrument to be placed in an angled position on the wall of
irregularly shaped drainage canals or on the sides of channels in which it is difficult or
impossible to place the instrument on the channel floor.
The tilt parameter is measured by an internal accelerometer. It represents the pitch and roll
of the instrument’s body as it is installed, and its value is expressed in degrees of angle.
This provides the user with useful information about the sensor after being is mounted
underwater or during a post-installation inspection.
Starflow QSD system consists of the following:
Model 6527B or 6537A Starflow QSD instrument
Model 6527M Stainless Steel Mounting Bracket
