Greyline Instruments MantaRay Specifications

Portable Open Channel Flow Meter

for Partially-filled Pipes and Open Channels

Portable Area-Velocity

Flow Meter

MantaRay

Display, Transmit, Totalize

Data Logand Flow

s andin Open Channel Pipes

Simple -key Calibration5

4-20mA Output

Two Control Relays

Measures Reverse Flow

Works in Irregular Channel Shapes

Portable

Open Channel Flow Meter

Hydrodynamic Ultrasonic Sensor

Measures Flow in Open Channels

with a Hydrodynamic Ultrasonic Sensor

Designed for flow surveys in open channels, partially full sewer
pipes and surcharged pipes deal for stormwater,. MantaRay is i
sewage irrigation water ., and natural streams

The uses a submerged ultrasonic sensor toMantaRay
continuously measure both Velocity and Level in the channel. The
sensor resists fouling corrosion ., and abrasion

View flowrate and total flow on the large backlit LCDrealtime
display onnect to. C samplers or SCADA and telemetry systems
with the 4-20mA and relay outputs Download flow log files to a.
USB memory stick.

Portable Flow Monitor for

Sleep Mode

Interval

Battery Life

Continuous

60 hours

30 sec

6 days

1 min

10 days

2 min

18 days

5 min

38 days

10 min

52 days

15 min

74 days

30 min

90 days

1 hr

110 days

Partially Filled Pipes & Open Channels

Easy to Use

The MantaRay Portable Area-Velocity Flow Meter measures
both and Velocity to calculate flow in an open channel orLevel
pipe. Calibration is simple: enter the pipe diameter or channel
dimensions and the automatically computes andMantaRay

Submerged Sensor
Measures Level And Velocity

The ultrasonic sensor mounts inside the pipe or the bottom of a channelon
with a stainless steel mounting bracket (included) and a single screw into the
bottom of the pipe or channel. No special compounds, tools or hardware are
required. The sensor is completely sealed with orifices or ports.no

Recommended Channel ConditionsPipe or

Careful selection of sensor mounting location results in best performance and
maintenance-free operation. Avoid locations where sediment builds up.

Best possible accuracy will result when t is not andhe water highly turbulent
where velocity is evenly distributed across the channel. The channel should not
have changes immediately upstream of the sensor mountingdrops or direction
location ipe or channel slope should not exceed 3%.and the p

The can measure forward flow velocity up to ft/sec ( m/sec)MantaRay 20 6.2
and reverse flow up to 5 ft/sec (1.5 m/sec). electronics and softwareThe
sample and average to provide readings. Theflow rates continuously stable
submerged velocity/level sensor will measure flow in partially full and
surcharged pipes with pressure up to 10 psi. No special set-up or adjustment is
required. Minimum recommended pipe diameter is 6” (150 mm).

displays flowthe rate and total on its backlit LCD display.

Built-in 2-Million Point Data
Logger

Use MantaRaythe to store time and date-stamped flow values at 10 second to 60
minute intervals. Daily flow reports are automatically created where total, minimum,
maximum and average flow rates are displayed on the LCD display. Transfer log files
to any USB flash drive just by connecting to the logger's USB output. Windows
software is included to display log files in graph and table formats, change
measurement units and generate flow reports. Export data to graphic or text file
formats, or directly to Microsoft Excel.

Sleep Mode for Extended Battery Life

Use the MantaRay’s ‘Sleep Mode’ function to extend battery life while logging flow.
The digital display, outputs and non-essential functions are suspended during sleep
mode. Based on the logger interval, the MantaRay activates the sensor for 12
seconds to obtain flow readings and then resumes low power mode until the next
logger sample interval. To indicate that sleep mode has been activated the digital
display flashes every few seconds while sleeping.

External Battery Input

Connect external 12 or 24VDC batteries to extend the MantaRay’s operating time
indefinitely. Or connect the battery charger supplied with each flowmeter for
continuous operation or for long term 4-20mA output and relay operation. Maximum
power consumption is 2.7 Watts.