Envco – Environmental Equipment

The River Hawk produces pulses as the shaft rotates, totalises the signal and outputs to SDI-12 and RS232 simultaneously. This signal relates to absolute level change from a set datum.

The signal can be viewed via the LCD display showing time, date and current water level and at the same time data is logged inside the in-built data logger which has the ability to record up to 50,000 events with 1 second resolution.

The River Hawk unique on-board help feature allows the user to obtain a list of commands
with their syntax. The indicator LED flashes once a second as a heartbeat, giving the user
confidence that the River Hawk is alive and well.

Specifications
Physical and Environmental
Size: 245mm (L) x 125mm (H) x 150mm (D)
Material: Diecast aluminium enclosure (IP65)
Weight 1.5kg
Temperature
Range: -20 oC to 70 oC
LCD: -20 oC to 70 oC
Humidity: 95% non-condensing

Mechanical
Torque: 25gm cm (0.35 oz.inch)
Follow Rate: 10 metres per minute
Pulses/Rev: 375 pulses per revolution (AD375A)
Resolution: AD375A - 1mm (375 pulses/rev)
Can be used in any size bore down to 100mm diameter.

Electrical
Operating Voltage: 9.6 to 16VDC (SDI-12 port) (12 VDC sealed lead acid 7Ah min)
Current Drain: 3.5 mA
Output: RS232 and SDI-12 simultaneously.
Battery Backup: Data integrity + Date/Time is guaranteed by 2 internal AA lithium 3V batteries
(3 years minimum life).
Range: +9999.999m
Resolution: 1mm (0.00001% of FS range)
Max Error: +1mm (+0.00001% of FS range)

LCD Display
Screen: 2 lines x 16 characters LCD
Backlight: Powered via SDI-12 port (9.6 to 16 VDC)
Display: time, date and current water level.
Parameters: User selectable via push buttons on the shaft encoder housing

In-built Data Logger
- Small and Compact.
- Low quiescent consumption.
- Data Memory size 512KB Serial Flash EPROM.
- Events Record up to 50,000 events, 1 Second Resolution.
- Sample Interval 1min to 24 hrs programmable.
- Communications: Bidirectional RS232 Port, (Tx, Rx)
- Optional: PSTN/GSM/Radio/GOES External Modem for remote telemetry.
- 1x ½ AA Lithium 3V battery (Internal Backup)

Optional Bluetooth or Infrared for data downloads
- Option 1: Bluetooth (Recommended)
- Option 2: Infrared

Accessories
- Floats and Counterweights
- Float Pulley Wheels
- Beaded or Borehole Float Line
- Wire Gate Mounting Kits
- Chain and Sprocket
- Gear Drives
- Mechanical Counter Kit

Packing Details
Dimensions: 270mm (L) x 170mm (H) x 200mm (D)
Weight: 2.0 kg

Ordering Information
RIVER HAWK ABSOLUTE SHAFT ENCODER, AD375AL, COMPLETE WITH INBUILT DATA LOGGER FOR WATER LEVEL MEASUREMENT, LOGS UP TO 50,000 EVENTS,WITH WATERPROOF DB9 CONNECTOR, 9.6 TO 16VDC, OUTPUT SIGNAL SDI-12 & RS232, IN POWDER COATED ALUMINIUM DIE CAST WEATHERPROOF CASE IP65, LCD, PUSH BUTTON PROGRAMMABLE DISPLAY SHOWING TIME, DATE AND WATER LEVEL READING WITH OFFSET (LITHIUM BATTERY BACK-UP), COMPLETE WITH
MOUNTING BRACKET, HUB AND LOCKING NUT FOR FLOAT PULLEY AND INSTRUCTION MANUAL

AD375AL ABSOLUTE SHAFT ENCODER, 375MM REVOLUTION, 1MM INCREMENTS.
AD375MAL ABSOLUTE ‘MAGNETIC’ TYPE SHAFT ENCODER, 375MM REVOLUTION,
1MM INCREMENTS.
AD150AL ABSOLUTE SHAFT ENCODER, 375MM REVOLUTION, 2.5MM INCREMENTS.
AD100AL ABSOLUTE SHAFT ENCODER, 1FT REVOLUTION, 0.01FT INCREMENTS.