Application Notes

Need practical information on the use of INW’s water monitoring and sampling products? Our application notes are readily available in PDF format. Simply download by clicking on the links below.

Smart Sensors

General Information

Grounding Information for Sensor Systems
Proper grounding protects equipment and personnel from high power spikes. It also improves accuracy by eliminating ground loops. Download

AquiStar® Smart Sensor Communication Cables
Alternatives for connecting AquiStar® Smart Sensors to a PC or laptop. Download

USB/RS485 Communication Cable Installation Instructions
Instructions for installing and using the INW USB/RS485 Communication Cable to connect AquiStar® Smart Sensors to a PC or laptop. Download

Changing Batteries in the AquiStar® Smart Sensors
This application note details the steps for changing batteries in AquiStar® Smart Sensors. Download

Modbus® Direct Read on AquiStar® Smart Sensors
Instrumentation Northwest now offers an easy-to-read Modbus version for several of their popular AquiStar Smart Sensors. These sensors communicate via Modbus RTU and directly return measurement readings, without any further math on the part of the host system. Currently, this feature is available on the following:

  • PT2X Pressure/Temperature Sensor
  • LevelSCOUT Level/Temperature Sensor
  • BaroSCOUT Barometric Pressure Sensor
  • PT12 Pressure/Temperature Sensor
  • CT2X Conductivity/Temperature/Pressure Sensor
  • TempHion pH/ISE/Redox Sensor
  • GDL Datalogger
  • Turbo Turbidity Sensor
  • DO2 Dissolved Oxygen Sensor

Download

Event Processing on AquiStar® Smart Sensors
This application note gives information on using Event Processing on INW Smart Sensors. Download

Reading AquiStar® Smart Sensors with Campbell Loggers
This application note provides information on how to read INW Smart Sensors with Campbell CR1000 and CR800 dataloggers. It includes wiring diagrams, register specifications, and sample code. Download

Voltage Regulation for Externally Powered INW Smart Sensors
Whenever powering an INW Smart Sensor with an external power supply, it MUST be a regulated supply allowing no higher than 15 Vdc. If using a regulated supply with an output close to 15 Vdc, be sure to determine the accuracy of the regulator to ensure that it does not provide more than 15 Vdc. Download application note.

 

CT2X Conductivity/Temperature/Pressure Smart Sensors

CT2X SDI-12 Interface Specification
This specification gives detailed information on reading a CT2X Smart Sensor using SDI-12. Download

Reading Salinity with a CT2X Conductivity Sensor
This application note gives detailed information on reading salinity with a CT2X Smart Sensor. Download

Configuring a CT2X Smart Sensor to Monitor Depth-to-Water, Groundwater Elevation, or Staff Gauge Equivalent
Select Settings and Calibration from the Configure menu in Aqua4Plus or click the Settings button in Aqua4Plus Lite. Click on the Pressure channel, if it isn’t already highlighted. From the drop-down box just below the channel list, select the type of measurement you want – submergence, depth-to-water, elevation, or staff gauge. A diagram will be displayed illustrating the type of measurement. Follow the step-by-step instructions on the Settings and Calibration page to complete the setup. If using an absolute sensor, you will need to know the current barometric pressure. For depth-to-water and elevation, you will need an alternate water level indicator to find the current depth-to-water. For elevation, you will also need to know the elevation of the top of the well and for staff gauge equivalent, you will need to know the current staff gauge measurement. Enter these values in the specified entry boxes. Not math is required.
For further details, refer to the technical bulletin “Configuring INW Smart Sensors for Depth-to-Water, Elevation, or Staff Gauge.”

DO2 Dissolved Oxygen Smart Sensors

DO2 SDI-12 Interface Specification
This specification gives detailed information on reading a DO2 Smart Sensor using SDI-12. Download

Calibrating the DO Probe
This application note gives instructions for doing a calibration on the DO channel on the DO2 Smart Sensor. Download

GDL Smart Dataloggers

GDL SDI-12 Interface Specification
This specification gives detailed information on reading a GDL Smart Datalogger using SDI-12. Download

PT12 and PT12-BV SDI-12/Modbus Sensors

PT12 SDI-12 Interface Specification
This specification gives detailed information on reading a PT12 or a PT12-BV using SDI-12. Download

PT2X and LevelSCOUT Pressure/Temperature Smart Sensor Family

PT2X SDI-12 Interface Specification
This specification gives detailed information on reading a PT2X, PT2X-BV, or PT2X Wet-Wet Smart Sensor using SDI-12. Download

Configuring a PT2X or LevelSCOUT Smart Sensor to Monitor Depth-to-Water, Groundwater Elevation, or Staff Gauge Equivalent

Select Settings and Calibration from the Configure menu in Aqua4Plus or click the Settings button in Aqua4Plus Lite. Click on the Pressure channel, if it isn’t already highlighted. From the drop-down box just below the channel list, select the type of measurement you want – submergence, depth-to-water, elevation, or staff gauge. A diagram will be displayed illustrating the type of measurement. Follow the step-by-step instructions on the Settings and Calibration page to complete the setup. If using an absolute sensor, you will need to know the current barometric pressure. For depth-to-water and elevation, you will need an alternate water level indicator to find the current depth-to-water. For elevation, you will also need to know the elevation of the top of the well and for staff gauge equivalent, you will need to know the current staff gauge measurement. Enter these values in the specified entry boxes. Not math is required.
For further details, refer to the technical bulletin “Configuring INW Smart Sensors for Depth-to-Water, Elevation, or Staff Gauge.”

NOTE: For Depth-to-Water on CABLELESS PT2X or LevelSCOUT, see the technical bulletin “Barometric Compensation with Optional Depth-to-Water Setting.” (For Aqua4Plus versions prior to 1.9.10 or Aqua4Plus Lite versions prior to 2.1.4, see the technical bulletin “Compensating INW Absolute Sensor Readings on Cableless Sensors.

Barometric Compensation for PT2X and LevelSCOUT Absolute Sensors
Aqua4Plus provides a simple utility for applying barometric compensation to PT2X or LevelSCOUT data from absolute sensors. Download.

Filter Response on an AquiStar® PT2X Smart Sensor
This application note gives filter response curves for our new PT2X filtering capabilities. Download

Error Compensation on PT2X Smart Sensors
This application note explains the patented method used by INW to transform basic strain gauge pressure readings into highly accurate, temperature and device compensated data. Download

TempHion pH/ISE/Redox Smart Sensors

TempHion SDI-12 Interface Specification
This specification gives detailed information on reading a TempHion Smart Sensor using SDI-12. Download

Calibrating an AquiStar® TempHion™ Smart Sensor
This application note describes the calibration procedure for a TempHion Smart Sensor. It also covers care and filling of the reference reservoir. Download

Turbo Turbidity Smart Sensors

Turbo SDI-12 Interface Specification
This specification gives detailed information on reading a Turbo Smart Sensor using SDI-12. Download

Analog Sensors

Grounding Issues with the PS-9 Series Submersible Pressure Sensors when Used with Campbell Scientific, Inc., CR10X and CR 510
An overview of grounding issues related to the use of the PS-9 Series submersible pressure sensors when used with the Campbell Scientific, Inc., CR10X and CR510 dataloggers. Download

Use of the PS9805 Pressure Transducer with the Campbell Scientific, Inc., CR10X for High Precision Readings on 5 PSI Sensors
Programming information for Campbell Scientific CR10X dataloggers for obtaining improved accuracy when using PS9805 – 5 PSI sensors. Download

Use of the PS9105 Pressure Transducer with the Campbell Scientific, Inc. CR10 – Standard Performance
A basic overview of the operation of the PS9105 submersible pressure transducer and how it is used with the Campbell Scientific CR10 Measurement and Control Module. Download

Use of the PS9105 Pressure Transducer with the Campbell Scientific, Inc. CR10 – Enhanced Process
A basic overview of using the PS9105 submersible transducer together with with the Campbell Scientific CR10 and custom PROM. Download

Telemetry

Wireless Data Collection  – White Paper
Environmental water concerns are increasing with the greater awareness of the dangers of pollution, increasing evidence for global warming, and security concerns arising from threats of terrorism. Few companies or government entities have the personnel, time, or budget to gather and monitor the data needed to make the far-reaching decisions needed today.  Download

Miscellaneous

Selecting Appropriate Cable for INW Sensor Applications
This application note is to acquaint the user with the various cable types and assist the user in making cable selections. Download

Using an AquiStar® DL2 with a USB Serial Adapter
This application note describes how to use a USB port rather than a serial port with Aqua4 and the AquiStar DL2 data loggers. Download