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 | Nortek
: EasyQ River Velocity & Stage Monitor
Measures the velocity out in the middle of the river
and away from the banks using the Doppler principle
and stage using acoustics.
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 | Nortek
: QLiner River Discharge Measurement System
Powerful system for calculations of discharge based
on the measured current velocities and waterdepth.
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 | Global
Water : FP101 & FP201 Global Water Flow Probe
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Sequoia Scientific :
RiverRad
Microwave Doppler Radar for Measuring River Surface
Currents. Coherent, pulsed, X-band (9.36 GHz) radar.
It measures surface currents in rivers using the Doppler
shifts induced in signals scattered off the rough
surface of the river to antennas that are directed
upstream and downstream. Because it is pulsed, RiverRad
measures currents in a variety of bins spaced |
equally across the
river. |
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 | Sequoia
Scientific : RiverScat
Continuous wave(CW) scatterometer. It estimates surface
currents by viewing the Doppler shift in microwaves
scattered similarly, either by wind-ruffled or floating
roughness elements(flotsam). These systems are much
less expensive than the range gated RiverRad system,
but they deliver measurements at a single spot of about
1m diameter on the river |
surface(depending
on range to water surface). These systems are mounted
typically under a bridge. |
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 | In-Situ
: Level Troll 500r
Water level and temeprature measurement and data logging
inside a 18.3mm (0.72 in) titanium
diameter housing. Features:-
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• Twist-Lock(TM)
connectors (patent pending)
• New super low-power system guarantees
long-term operation plus the unit can be powered with
external power.
• Communication protocol in
RS-485/232 Modbus, SDI-12, and 4-20mA. |
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 | In-Situ
: PXD Transducers
PXD-261 pressure transducer for measuring
pressure/water level combines the benefits of durability,
accuracy, compactness, and convenience. PXD-461 is designed
for high-pressure applications, the PXD-461 is available
in 500 PSIA and |
1000 PSIA models. It
provides excellent accuracy and reliability for monitoring
deep wells, wells with high shut-in pressure, or high
pressure piping.
PTX-1830 is a mere 0.69 inches in diameter
(17.5 mm), weighing just 4 oz, available in various
ranges and in titanium/316 stainless steel construction.
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 | In-Situ
: BaroTroll
Low-cost, self-contained logger that is used to measure
barometric pressure and temperature. System integration
is a snap with RS-485/232 Modbus, SDI-12,
and 4-20mA communications. |
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 | In-Situ
: Hermit 3000
Monitors up to eight external 4-20 mA probes, plus an
internal barometric pressure sensor. Portable and weather-resistant,
the HERMIT 3000 is ideal for multi-well sites.
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