1. INW SENSOR TECHNOLOGY
Future Ready

2. Sensor History at INW INW has been making sensors since 1985
Analog Pressure Sensors 1985
Smart Pressure Sensors 2002
Smart Conductivity Sensors 2006
Analog pH & ISE Sensors 1995
Smart pH & ISE Sensors 2006
SDI-12/MODBUS Sensors 2008
INW has been making sensors since 1985

3. What we will cover Overview INW Analog sensors INW Digital Sensors
INW Smart Recording Sensors
INW Wavedata Wireless: Real time data collection
Meeting the USGS-HIF Requirements!

4. INW Analog Sensors

5. PS9800 Pressure Temperature Sensor
Analog Sensors
PS9800 Pressure Temperature Sensor
-4-20 mA output
-high accuracy .1% FSO
-thermal calibration
-submersible
-modular design : field servicable
-upgradeable to INW smart sensors: Pt2X

6. Analog Sensors PS98i - 4-20 mA -Submersible -0.1% FSO accurate
-Modular (field servicable sensor or cable harness
-upgradeable to 2 –protocol sensors with no internal AA’s.

7. SDI 12/Dual Protocol Sensor: Sdi12 or Modbus Digital
Highly Temperature Compensated
Low Power
Absolute, Gauge, Wet-Wet differential
Non-recording
Competitive Price
Upgradeable to Smart Recording Pt2X

8. INW Smart Recording Sensors
Common Features

9. Smart Sensors: Common Features
Recording from 1 to 4 mb
Non-volatile
Records in files, old files can be retained up to memory limit
Can upload files without stopping recording
Can measure and record simultaneously

10. Smart Sensors: Common Features
Run on internal batteries: 3.0 or 3.6 VDC
Great for stand alone data collection and portable installations
User-replaceable, AA batteries, alkaline or lithium
Operate for a year without replacing batteries at 15 minute interval collection

11. Smart Sensors: Common Features
Auxiliary power input : 5.5 – 15 VDC
Allows for continuous operation
Switches off 3 volt supply so it becomes backup

12. Smart Sensors: General Features
Modbus protocol: RS485
Programmable Baud rate
38,400 standard
Transmit data over radios and cell modems
Data accessible from the Internet
Network on 3-wire bus to 32 devices

13. Smart Sensors: General Features
SDI-12 output
Currently Implemented in CT2X-P and pt2x
Temphion has components and is sdi12 ready
T32 temp recorder is Sdi12 ready
GDL know includes sdi12 outputs

14. Smart Sensors: General Features
Digital Output Control line
Currently Implemented in Temphion for auto-sampling
Custom programmable if installed in firmware in other sensor models. Hardware is there!
Alarming and control

15. Smart Sensors: General Features
Powerful Free utility Software
A4plus for general operation
A4push for auto-network data collection
Firmware Downloading
Allows for future improvements and features

16. General Features Powerful software Aqua4Plus Aqua4Push General control
Real time monitoring
Recording data
Calibration
Aqua4Push
Gather data from various sites and upload to FTP site

17. PT2X Smart Pressure Sensors

18. PT2X Smart Sensor & Datalogger
Pressure,Temperature & Time
Absolute, gauge,wet-wet differential or sealed gauge versions: Vented or Non vented!
Highly Thermally compensated
Very Low power – two internal AA batteries will record 500,000 records
Memory up to 520,000 records
Small diameter – 0.75”

19. PT2X Smart Sensor & Datalogger
316 stainless or titanium
Viton®, Delrin® and Teflon®
Variety of pressure ranges
Networks with all INW Smart Sensors
Compatible with WaveData® wireless data collection systems
Cabled or Cableless

20. Cutaway View of PT2X Pressure Element Inlets 2 AA Size batteries Cable
End cone
Smart Sensor circuit board
Top-cap/cable harness

21. TempHion Smart pH/ISE/Redox Sensors

22. TempHion Smart Sensor & Datalogger
pH / ISE / Redox & Temperature
Thermally compensated
Low power – two internal AA batteries
Over 65,000 records
Small diameter – 0.75”
Patented highly stable reference electrode designed for long term monitoring

23. TempHion Smart Sensor & Datalogger
Solution ground for excellent noise protection
316 stainless steel
Viton®, Delrin® and Teflon®
Networks with all INW Smart Sensors
Compatible with WaveData® wireless data collection systems

24. Cutaway View of TempHion
Embedded Thermistor
Reference solution reservoir
pH/Redox or Nitrate module
2 AA batteries
Cable
Smart Sensor circuit board
Patented reference electrode (inside)
Solution ground and plated electrode (on other side)
Top-cap/cable harness

25. TempHion Measurement Theory
The TempHion works on the principle of direct potentiometry—the same principle that governs any other pH or ISE electrode.
Two electrodes
Sensing electrode (button)
Reference electrode (in reservoir)

26. TempHion Measurement Theory
Reference electrode immersed in filling solution of known chloride content. Chloride content stays constant as long as solution is not contaminated or diluted.
Filling solution must be in contact with solution being tested to complete the electrical circuit.
Liquid junction port

27. Measurement Theory Sensing electrode
“Cell potential” is measured across the two electrodes.
Potential of sensing electrode varies logarithmically with the concentration of the ion it senses.
Aqua4Plus uses this reading and applies calibration and temperature compensation to arrive at highly accurate readings.
Reference electrode

28. CT2X Smart Conductivity/Pressure Sensors

29. CT2X Smart Sensor & Datalogger
Conductivity & Temperature with Pressure optional
Low power – two internal AA batteries
Over 349,000 records
Linear and nLFn temperature compensation
Small diameter – 0.75”
316 stainless or titanium
Viton®, Delrin® and Teflon®

30. CT2X Smart Sensor & Datalogger
10 μS/cm to 100,000 μS/cm
Variety of pressure ranges
Absolute, gauge, or sealed gauge
Networks with all INW Smart Sensors
Compatible with WaveData® wireless data collection systems

31. Cutaway View of CT2X Optional pressure module Cable harness
Circuit board
Conductivity probe
2 - AA Batteries

32. CT2X Measurement Theory
INW Technology
Epoxy/Graphic probe
Durable
Easy to clean with cotton swap or small brush
4-pole electrode
Reduces fringe field interference
Lessens errors caused by polarization effects
Lowers contact resistance problems
Allows one electrode to work over wide range of conductivity

33. GDL:
General Data Logger

34. GDL: General Data Logger
Specifications
7 standard channels
1 custom channel
Programmable warm-up time
RS485 Modbus® interface
Sdi-12 output to bridge analog party sensors
One-read modbus to convert analog sensors to digital
Controlled via Aqua4Plus and A4push
Compatible with WaveData® Wireless Systems
Can be networked with other AquiStar® Smart Sensors

35. GDL board Digital board 2 4-20 mA 2 Thermistor Power 3 or 12 vdc
Strain Guage
3 Voltage
Communication

36. GDL and Booster Board Supplies 12 VDC to sensors
Enabled during readings

37. T8, T16 & T32 Temperature Data loggers
Specifications
Thermistor or One-wire Temperature
Data logger
Various thermistors available
Up to 16 thermistors per unit
Up to 32 one-wire temp chips per unit
Weatherproof surface control box
29,000 – 174,000 records, depending on number of active channels

38. Cellular and Radio Frequency Modems
Instrumentation Northwest Presents…
Cellular and Radio Frequency Modems

39. Wavedata Overview Easy Wellhead installation
Multiple low-power configurations
Cellular, License free, or Both
Watertight Assembly
RS485 communication allowing networking of up to 32 devices
Each project specifically designed to lower costs
Well Head
Wave Data Unit
At Right: Design Set for site specific Installation
Center: Wavedata site installation with solar power
At Left: Typical installation includes wavedata control boxes mounted at each wellhead.

40. Wavedata Overview License Free Low Power 900 MHz and 2.4 GHz
Multiple Power Levels
.01 watt
1000 feet range
1 watt
Five mile range
38,400 baud rate
Variety of antennas available
Above: Buoy based Wavedata installation for Twin Lakes project in Colorado

41. Wavedata Overview Power Options: Battery Power Solar Power Hybrid
Replaceable alkaline batterys
Life expectancy = 5 years
Solar Power
Low cost solar panels
Maintenance-free site
Hybrid
Batteries charge for winter use
Batteries used as back-up power source

42. Available Configurations
Remote radios can be used at ranges up to five miles
Addition of ip Cell modems allows real-time communication at unlimited distances
Combination configurations are more economical for applications with multiple points of data
Remote Radio connected to sensors.

43. Software
Data availability in several formats through INW’s Aqua4Plus software.
Polling and hosting services offered through INW’s Wavedata system

44. Remote access made easy.
Allows easy access to remote data
Mitigates risk of on-the-job injuries
Lowers overall project costs
Improves data quality
Allows access to ecologically sensitive environments
Minimizes environmental impact from access

45. Unique Features Capability of working in cross-platform environments:
Non-proprietary file types work with most data management suites and tools, as well as in-house applications.
System design allows for many types of sensor and data inputs, including those not manufactured by INW
Dedicated and knowledgeable support staff throughout your projects duration
“Future ready” design accommodates future changes to project scope and design

46. Meeting HIF and Mcert Requirments:
INW’s History in Sensor Innovation
Advancements in Sensing: Strain Gauge Improvement
Smart Sensors: Advances in thermal compensation
Smart Sensors: Advances in linearization and Long Term drift

47. INW’s Progress & Improvement
INW Patents -Submersible Sensor – Temperature Compensation – Cable & Harness – 1999

48. Patent # 5,033,297 – July 23, 1991 Submersible Sensor
Patented water-tight O-ring seal at each end
Installs without rotating or twisting
Multiparameter sensing
Modular construction

49. Temperature Compensation
Patent # 5,460,049 – October 24, 1995
Better temperature compensation methods
Unique algorithims using sophisticated characterization
Advanced Calibration methodology

50. Temperature Compensation
Patent # 5,460,049 – October 24, 1995
Advantages of INW’s Patented Solution
Compensates for temperature related errors.
Calibration of each unit eliminates differences between individual sensors.
No additional temperature sensors needed for temperature measurements.
Uses a relatively inexpensive strain-gauge device for high-accuracy readings. (.03% FSO for 5 psi device at 0° – 35° C)

51. Cable/Harness Patent Patent # 5,857,714 – January 12, 1999
Rapid Assembly
High pressure rating
High pull strength
Reduces materials exposed to water
Marked measurement cable
Double-redundant sealing

52. Measurement Specialties IC86 “Ultra-Stable” Pressure Sensor
Stability
Measurement Specialties IC86 “Ultra-Stable” Pressure Sensor
.02% Repeatibility
.05% Pressure Hysterisis
.05% Temperature Hysterisis
.75% FS Span Thermal error (-20 to 85 C): Challenge to Solve
.5% FS Zero Offset Thermal error (-20 to 85 C): Challenge to Solve
.1% FS non-linearity: Challenge to Solve

53. Solving Thermal Error Elements have thermal Character
Measure Temperature and Pressure over Range to optimize for each sensor
Generate Calibration Coefficients
Apply Cal Values to each measurement
Improves Thermal error to .1% over -20 to 85 C, .05% over 0 to 40

54. Solving linearization error
Once sensor is thermally compensated to range, you can apply additional linearization math
Currently 3 pt algorithm

55. Long-Term Drift: Last Challenge
Currently specificed at .1% FS Span/yr Typical
Depends on many factors
Current recommendation: Service every 6 months, by doing this you eliminate installation variables as well
Results: Less than .01 Feet error over 3 years with our 30 psi units!!!

56. Questions? Suggestions for improvement? Current needs?
Please visit us at

57. Thank You!
Instrumentation Northwest nd Ave NE, Kirkland WA, USA