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SURFACE WATER INSTRUMENTS
Flow portable instruments
Flo-Probe velocity flow meter from Global Water Inc, simple, low cost, accurate (+/-0.03 m/s) with telescopic handle extendible 1.0-2.0m (model FP111) or 1.5-5.0m (model FP211)
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Flow – portable instruments
Electromagnetic portable flowmeters (velocity meter) from Marsh McBirney, accurate, rugged, never needs calibration, no maintenance (just cleaning)
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Stainless steel propeller type flow meters (4 different types with both horizontal and vertical shafts) with hand held pulse counters, flow calculators, wading rod sets, etc
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The RF20 salinity refractomet from Extech Instruments measures the salinity of water to high accuacy. It is: easy to use, rugged, cost effective
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Flow fixed position instruments
A range of continuous monitors with data logging (optional communications) for measuring parameters including level, flow, conductivity, pH, ORP/Redox, dissolved oxygen, turbidity, nitrates, chlorophyll and many more.
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A number of different types of systems to monitor flow in streams & rivers. Various functions like totalisation, communications, etc are available.
Call Geowater for application assistance.
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Open Channel Flowmeter by Global Water - Based on an accurate and stable pressure transducer, this unit displays instantaneous volumetric flow in engineering units and totalized flow. Alarm/control outputs and simple data logging is also available
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Water Flow Logger FL16 from Global Water is mounted at V-notches, pipes, flumes and weirs to measure volumetric flow. It is based on a depth sensor, from which the water level is used to calculate flow. Simple, rugged, easy to use, accurate and reliable.
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Automatic Samplers
The WS750 is a stormwater sampler with 2 peristaltic pumps & 2 x 7 litre sample bottles (one for discrete sampling and a second to hold a composite or average sample). Includes delayed start-up and triggered start-up. Very easy to set up & use.
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The WS700 Wastewater or Composite sampler is used in many applications where a composite or average sample is required. It has one sample bottle of 20 liters. Sampling is via a peristaltic pump. Low cost and simple to operate.
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Other models with various facilities are also available
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Peristaltic sampling pumps
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This pump is a good quality, simple peristaltic pump with variable speed drive, forward/reverse function. Reasonably priced
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The SP250 is a 3-roller 12v dc peristaltic pump with variable speed drive for purging and sampling work with backflush. Maximum head of 7m. Easy to maintain and clean. Features: backflush, waterproof casing, accurate dialable sample volumes.
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Water Quality sensors
The WQ301 conductivity transducer from Global Water offers: Temperature compensated, multiple ranges available, accuracy 1% FS, maximum depth 50m, 4-20mA output, 12v dc power. It is ideal for use in SCADA and logging systems
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The WQ600 ORP/Redox transducer from Global Water has a range of -500 to +500 mv, accuracy 2% FS , temperature compensated, maximum depth 50m, 4-20mA output, 10-36v dc power. Ideal for SCADA/logger applications.
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The WQ201 pH transducer from Global water has: range 0-14 pH units, temperature compensated, accuracy 2% FS, maximum depth 50m, 4-20mA output, 10-36v dc power. It is ideal for use in SCADA and logging systems.
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The WL400 from Global water is a pressure transducer with nominal ranges 0-1m, 0-5m, 0-10m, 0-20m, 0-40m, 0-60m or 0-150m sensor ranges, accuracy 0.2% FS, 4-20mA output, 10-36v dc power, barometric pressure and temperature compensated
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Multi-parameter monitors
The Manta multiprobe from Eureka Environmental can have a choice of conductivity/TDS/Salinity, pH, Redox, Dissolved Oxygen, ammonia, Turbidity and chlorophyll sensors. Data display/collection can be via the Amphibian (PDA based) hand held display unit.
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