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Water quality monitoring is performed for water in streams, rivers, lakes and in the groundwater system, using bore holes.
There are several different measures for water quality, for example electro conductivity (EC), pH ( PH) , dissolved oxygen (DO).
When measuring water quality, water depth and water flow can also be important factors.
Hence, instruments measuring these parameters like 6542D Hydrostatic depth probe or the 6526H Starflow instrument may be added to a water quality measurement station. In some instances turbidity of the water may also be measured.
Unidata supplies a wide range of water quality monitoring systems. In the example shown in the illustration, water conductivity, temperature, pH, dissolved oxygen and water depth are all measured.
This system combines a 6536E Water Electro-Conductivity instrument with a Neon Remote Terminal/ data logger which is connected to a central neon server via a telemetry link, either cell phone or satellite.
The 6536E Water Electro Conductivity instrument and the Neon Remote Terminal / data logger are set up using the local scheme / program to measure the instruments every one minute, and log the data every 5 minutes and then communicate the data to the central server every 1 or 2, 4 or 8 hours. The water conductivity probe is connected to the 6536E instrument via an SDI 12 bus, while the other instruments are connected to the Neon Remote Terminal / data logger via a field termination strip located in the waterproof enclosure.
Ultra low-power consumption makes the 6536E and the Neon remote Terminal ideal for remote, unattended operation. This instrument will operate for up to 2 years from a small lithium battery package.
Installing the Neon Remote Terminal enables you to monitor data acquisition, reprogram the unit, and check the health of the site, all from a remote location using a web browser anywhere in the world.
The choice of telemetry option would be based on cellular coverage in the measurement area and costs associated with reporting the data back. Satellite services for these applications have reduced in price over the last 5 years, so satellite services are a reasonable option for such measurement stations
The systems can be powered using lithium battery packs, or a small solar panel and battery.
Like all Unidata systems you can connect many other sensors to the standard system. For example, the water quality may be affected by the rate of flow, so a 6526H Starflow could be used to measure the rate of flow. If the flow you intend to measure is shallow, you could use the depth measurement facility of the Starflow and omit the 6542D Hydrostatic Water Depth and Temperature Probe.
|Options for Application Specific Instruments / Inputs||Unidata Part Number||Description|
|Four Electrode Conductivity Instrument||6536E||4EL Water Conductivity Instrument|
|Four Electrode Water Conductivity Probe||6536P-2-X||4EL Water Conductivity Probe with 10m, 20m, 30m or 50m of cable|
|Hydrostatic Water Depth Probe||6542D-X||PT12 Pressure/Temperature Sensor SDI-12 3.5m, 10m or 20m|
|Hydrostatic Water Depth Probe - Titanium||6542D-X-T||Titanium PT12 Pressure/Temperature Sensor SDI-12 3.5m, 10m or 20m|
|Double Junction Teflon-pH Probe||6528C||pH Probe|
|Dissolved Oxygen Probe||7422A||O2 Probe|
|Options for Neon Telemetry - NRT / RTU / Field Units||Unidata Part Number||Description|
|Cellular RTU 3G||2013F-AB03||Neon Metering Module 3G with Antenna and Li Battery|
|Cellular RTU 4G||2013F-AB04||Neon Metering Module 4G with Antenna and Li Battery|
|Cellular RTU 3G - Industrial||2016F-AB03||Neon Remote Terminal 3G with Antenna and Li Battery|
|Cellular RTU 4G - Industrial||2016F-AB04||Neon Remote Terminal 4G with Antenna and Li Battery|
|Low Earth Orbit Satellite Globalstar||2015E-AB0||Neon Remote Terminal - Satellite Globalstar Modem with Antenna and three Li Batteries|
|Ethernet||2017E-0B0-1 or 3||NRT Ethernet with single or triple Ethernet Ports|
with three Li Batteries
|Equatorial Orbit Satellite - Inmarsat||2018E-AB0-1 or 3||NRT Ethernet with single or triple Ethernet Ports|
with three Li Batteries
|LCD Display||2500E||NRT LCD Display|
|NRT Field Termination Strip||2103F||2015E,2016F,2017E, and 2018E NRT FTS|
|NRT Firmware Option||2303A-8M||8M Extended Memory Option|
|NRT Firmware Option||2303A-8M-CAM||8M Extended Memory & Serial Camera Option|
|NRT Firmware Option||2303A-CAM||Serial Camera Option|
|Options for Neon Application Software - Customer Server||Unidata Part Number||Description|
|Neon Application Software||2302A||Neon Server Software Licence Incl 5 NAL |
|Neon Application Software||2302A-10||Additional 10 NRT Access Licences|
|Neon Application Software||2302A-20||Additional 20 NRT Access Licences|
|Neon Application Software||2302A-50||Additional 50 NRT Access Licences|
|Options for Neon Application Software - Unidata Server||Unidata Part Number||Description|
|Neon Application Software||2301A||Neon Data Initial Subscription Setup Fee|
|Neon Hosting Service||2301A-01||Neon Data Service Fee for 1-50 NRTs|
|Neon Hosting Service||2301A-02||Neon Data Service Fee for 51-100 NRTs|
|Neon Hosting Service||2301A-10||Neon Data Service Fee Metering|
|Options for Conventional Dataloggers / Field Units||Unidata Part Number||Description|
|Standards Starlogger||6004D-11||Red Logger 512K with Alkaline Battery|
|Display Starlogger||6004D-21||Blue Logger 512K with LCD and Alkaline Battery|
|Prologger||7001D-11||Green Logger 1M with LCD and Alkaline Battery|
|Starlogger Field Termination Strip||6103E||6004D FTS|
|Prologger Field Termination Strip||7100E||7001D FTS|
|Starlog V4 Management Software||6308A-AUE||Starlog V4 Full Licence Key|