Aquamonix - Model GW50 -Optical Groundwater Nitrate Sensor

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Many countries around the world are in the process of adopting nitrate sensor and caps via nitrogen discharge allowances to manage nitrate losses into surface and groundwater resources. This issue is particularly prevalent in areas where agricultural production has the potential to impact on downstream water resources. To address this, Aquamonix has commenced selling the Hydrometrics GW50 Nitrate sensor. It is a lower cost sensor capable of measuring the Nitrate concentration of nitrates in groundwater via monitoring wells.

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Groundwater deployment to measure nitrate-nitrogen concentrations.
Deployment in low ionic strength groundwater means organic carbon or chloride interferences are minimal.
Designed to allow installation in 50 mm wells. These are often able to be installed by low-cost direct push technologies, reducing the overall installation cost.
Remote data-logging capability for real-time data.
A fit for purpose Nitrate Sensor at a low price point that enables feasible deployment across multiple sites at the catchment or farm scale.
Low power consumption (solar power installation possible).
The sensor utilises optical sensor technology to extend the service interval when compared to other lower-cost technologies such as Ion Selective Electrodes, which often suffer from significant calibration drift. This makes the
HydroMetrics optical sensor more suitable for long-term
unattended deployment.
Periodic cleaning rather than calibration required, reducing ongoing maintenance.
Continuous monitoring as opposed to laboratory analysis is rapidly growing within the agricultural community due to increased data frequency.

Whatever your application there is an Aquamonix product to suit your requirements. Check out our documentation for more specifications or click here to contact us for any queries.

Groundwater deployment to measure nitrate concentrations.
Remote data-logging capability for real-time data
Deployment in low ionic strength groundwater means organic carbon or chloride interferences are minimal

Designed for installation in 50 mm wells. These are often able to be installed by low-cost direct push technologies, reducing the overall installation cost.
As little as 1/3 the cost of traditional technologies which enables deployment of more sensors and avoids the cost prohibitive nature of full spectrometers. 30% of the cost of full spectrometers, enabling multiple installations within the same budget.
Low power consumption, meaning remote solar power installation possible.
The sensor utilises optical sensor technology to extend the service interval and reduce calibration drift. This makes the HydroMetrics optical sensor more suitable for long-term unattended deployment.
Periodic cleaning rather than calibration required, reducing ongoing maintenance
Capable of delivering real-time data and good for nitrate measurement.

Measurement technology (light source): Xenon flash
Measurement principle: UV Absorbance
Measurement cell: 10 mm tube
Parameter: NO3-N
Measurement range: 0 – 60 mg/L (without measurement cell alteration)
Measurement accuracy: +/- 5% +0.1 mg N/L
Turbidity compensation: Yes
Data logger: ~ 16 GB internal storage
Measurement interval: ≥ 1 min
Housing material: 316 stainless steel
Dimensions (ø x L): 42.2 mm x 455 mm
Weight: 1.55 kgs
Interface: SD1-12 / RS-232
Power consumption: < 100 mW
Power supply: 11.5 – 15.5 V
Guarantee: 1 year
Max pressure: 2.0 bar as standard