Manufacturers of Quality Hydrological, Meteorological & Environmental Instruments & Equipment

 Established in 1965  Development of Products for these applications:  Water Level  Water Flow  Sediment Sampling  Meteorology  Data Acquisition  Calibration services

1. Absolute Shaft Encoders (optional integrated data logger) 2. Constant Bubbler Systems - Nitrogen & 12V *fitted with appropriate non- submersible pressure transducers 3. Pressure Transmitters 4. Non-contact using Radar for measurement of level, surface velocity, or discharge

ABSOLUTE AD100A - AD150A - AD375A ABSOLUTE WITH DATA LOGGER AD100AL - AD150AL - AD375AL ABSOLUTE WITH DATA LOGGER AD100AL - AD150AL - AD375AL

AD375 Model4-20mASDI-12 Extra SDI-12 Logging with RS232 Rainfall USB Memory Stick StandardAD375MA xxxx Option 1AD375MA/S xxx Option 2AD375MA/L x x Option 3AD375MA/U x

WL3100 Model 4-20mASDI-12 Extra SDI-12 Logging w/RS232 Rainfall USB Memory Stick StandardWL3100 xxxx Option 1WL3100/S xxx Option 2WL3100/L x x Option 3WL3100/U x

HS-23 Nitrogen Bubbler Precalibrated Regulator Valve Double or Single Line Systems No Site Glass Easily Serviced & Maintained Requires Nitrogen Bottles HS-40 Advanced Bubbler System Inbuilt Air Compressor, 12VDC Low Power Consumption User adjustable bubble rate Inbuilt WL3100 Pressure Transducer Accuracy 0.02% F.S. Maintenance free for up to 5 years

Hydrostatic level sensor - ‘Ultra’ low power consumption (30mA continuous) - Maximum water head 30m (100 ft) - In-built air compressor and dryer system - Low Power Consumption - Used in conjunction with the Gas Chamber Orifice Model GCO1 - Maintenance free for up to 8 years - Up to 200 Meters river line 3. ‘Trident’ Hydrostatic System Gas Chamber Orifice Model GCO1

Model HS-55DO 2 orifices at two different levels Uses one orifice at a time Only 1 pressure transducer reqd. Model HS-55DB Measures 2 bodies of water simultaneously The orifices can be at two different levels and two different locations. Two pressure transducers required

Model HS-55

PT2X: PRESSURE/TEMPERATURE SMART SENSOR WITH DATA LOGGING  RS485/RS232 interface  Small diameter  Twist open case  Pressure, temperature & time  130,000+ records / non-volatile  316 stainless steel, Viton® and Teflon® construction (Titanium optional)  Polyethylene, polyurethane and FEP Teflon® cable options  Cableless version available  MODBUS® protocol for RTU & PLC applications  Easy export to spreadsheets & databases

Current Meters  Horizontal & Vertical Axis Current Meter Counters & Flow Computers  CMCsp Current Meter Counter  PVD100 Point Velocity Display  ‘HydroMate’ Flow Computer / Discharge Logger Stream Gauging Equipment  Portable & Bank Operated Winches  ‘Hornet’ Remote Control Cableway Gauging System ‘Top Set’ & ‘Bottom Set’ Wading Rods  Sediment, Bedload & Bed Material Samplers

 Robust Construction  Interchangeable Buckets in case of damage  High accuracy ±1%  Advanced contact switching system  Minimum starting velocity 0.025m/s  Maximum Velocity 5.0m/s  Durable pivot & bearing assembly for long lasting replicated motion  Direct velocity reading when used with the CMCsp, PVD100 or HydroMate Model RB1 - New Vertical Axis Current Meter

Model OSSB1 Universal Current MeterModel OSSB1 Universal Current Meter Fan TypeSize Max Velocity m/s Start Velocity m/s Range of Component Effects A100mm x 0.125m ± 45 ° 1125mm x 0.25m ± 5 ° 2125mm x 0.50m ± 5 ° 480mm x 0.125m ± 5 °  Stainless Steel construction - resists corrosion and damage  Rubber encapsulation of the Reed Switch to resist damage from dropping or knocking  Hockey Stick’ style Sewer Rod to position meter in pipe for man hole  Minimum Starting Velocity 0.025m/sec  Stainless Steel Propellers, 4 Sizes  Non Contact Switching

Model OSSPC1 Pygmy Current Meter TypeSize Max Velocity m/s Start Velocity m/s Range of Component Effects A100mm x 0.125m ± 45 ° 1125mm x 0.25m ± 5 ° 2125mm x 0.50m ± 5 ° 480mm x 0.125m ± 5 °  For Measuring Water Velocities from to 6.0 m/sec  Streamlined and Robust Nickel Silver Body  Stainless Steel Axle  Anodized Aluminum Propellers,3 sizes  Non Contact Switching System - Permanent Magnet and Reed Switch  Special Sewer Model Available

Model CMCsp Current Meter Counter & Signal Processor  Direct Velocity Reading  Digitally processes and ‘cleans’ signals from Catwhisker and Magnetic Head Meters  Operates with two ‘AA’ batteries  Works in high conductivity water( > 50,000μSiemens)  Self contained unit with 2 x 8 character LCD display showing total meter counts and elapsed time  Integrated Bluetooth Interface and RS232 Interface  Also operates with any Palm, PocketPC, or Field Computer.  Fully self calibrating  ‘Self Test’ for Serial Interface setup  Can display and produce ‘Spin Test’ record  Selectable 10 second to 90 second fixed measuring intervals; default is 40 seconds  Total Counts to 999, Total Time to seconds  Range of Measurement from 50 ft/sec  Continuous measuring mode (no time limit)  Automatically indicates fault conditions

Model PVD100 Point Velocity Display  Direct Velocity Reading  Digitally processes and ‘cleans’ signals from Catwhisker and Magnetic Head Meters  Operates with two ‘AA’ batteries  Works in high conductivity water( > 50,000μSiemens)  Self contained unit with 2 x 8 character LCD display showing total meter counts and elapsed time  Integrated Bluetooth Interface and RS232 Interface  Also operates with any Palm, PocketPC, or Field Computer.  Fully self calibrating  ‘Self Test’ for Serial Interface setup  Can display and produce ‘Spin Test’ record  Selectable 10 second to 90 second fixed measuring intervals; default is 40 seconds  Total Counts to 999, Total Time to seconds  Range of Measurement from 50 ft/sec  Continuous measuring mode (no time limit)  Automatically indicates fault conditions

 All functions are touch screen selectable, which include setting parameters, data input and download.  State of the art microprocessor based instrument used to measure the discharge of water when used in conjunction with Current Meter Fans and operates as an autonomous unit.  Allows up to 32 fan calibration formulas to be entered for accurate direct reading of river flow.  Capable of storing 30 sites of data with 30 verticals per site and 11 points per vertical  Re-chargeable batteries (2 ‘D’ cell) and inbuilt battery charging circuit, high temperature LCD touch screen control.  Rabbit 2000 Microprocessor  4 Mbit Flash Memory  On Board 8 Mbit Serial EEPROM Data Memory  4 Mbit RAM Data Buffer  Communications RS232 port configured as DCE.

WS400 Single Drum Boat/Bridge Gauging Winch  For cable suspended current meter measurements sediment, bed- material & bed-load sampling.  Replaces both USGS A reel B Reel. DDT600 Bank Operated Double Drum Gauging Winch  for stream flow measurements, sediment, bed-material & bed-load sampling, suspending current meters where bridges or boats are not suitable.  Used with Travellerways with span up to 200ft. HORNET Remote Controlled River Gauging System  Used on spans up 1km (.62 miles)  Portable 12VDC powered Hoist can be used on multiple cableways  No maintenance required  Used with mechanical current meters as well as ADCP’s  (Acoustic Doppler Current Profilers)  Radio Controlled Hoist with 1KM range.  Automatic Wet Line / Dry Line Correction  Automatic Correction for Cable Sag (distance traveled).

 Used on spans up 1km (.62 miles)  Portable 12VDC powered Hoist can be used on multiple cableways  No maintenance required  Used with mechanical current meters as well as ADCP’s  (Acoustic Doppler Current Profilers)  Radio Controlled Hoist with 1KM range.  Automatic Wet Line / Dry Line Correction  Automatic Correction for Cable Sag (distance traveled).  Suitable for ADCP OR conventional current meter  Auto-correction of distance and depth (air / wetline)  Variable traversing speed (maximum 1m/sec or 3.28ft /sec)  Wireless hand- control  Depth Measurement Resolution (0.01m OR 0.01ft)  Built-in Signal Processor for Mechanical Current Meters

ML1-420 is replacing all ML data loggers  1 digital input for rainfall or flow meters etc.  1 analog input 4-20 mA for water level  1 input for ambient temperature  external battery voltage monitoring,  internal battery volt monitoring,  Event storage of 600,000 events  RS232 Port for connection to modem, data download & programming.  Internal power supply: Internal lithium, alkaline, or rechargeable battery.  External Power Supply: 12 V DC.

 New, very low power processor.  Touchpad now 4-button keypad.  LCD true graphics (128x64 pixels).  Logging memory 8MB.  SDI-12 support.  User replaceable lithium battery.  Diecast aluminium enclosure.  Two NG12 glands for cable entry.  Internal jumper links for current inputs and debounce selection. iRIS 150

 Lighter, diecast aluminums enclosure.  LCD true graphics (128x64 pixels).  Logging memory now 8MB.  RS232 connector now external.  4 x Digital I/O ports. Can be in or out.  Four NG16 glands for cable entry.  iRIS-CAM adaptor built-in.  User replaceable backup battery.  Fixed 5V excitation output now supports variable voltage or current.  Internal links for current input and debounce selection.  Has been released with same software as iRIS 220/320. iRIS 350

Hydrological Services ongoing R&D program will continue to provide water cycle measurement and monitoring solutions for a wide range of International clients Questions?