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Hydro Services Absolute Shaft Encoder

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The shaft encoder can be float operated or connected to other servo mechanical sensors, chart recorders and weir gates with drive gears or chain and sprocket assemblies

Hydrological Services Absolute Shaft Encoder

The Hydrological Services Absolute Shaft Encoder model AD375A, AD150A and AD100A are low power, computerised shaft encoders designed for field operation to enable measurement of water level.

The internal CMOS circuitry enables the encoder to output measured levels in absolute format. The absolute shaft encoder produces pulses as the shaft rotates, totalises the signal and outputs either 4 to 20 mA, SDI12 or RS232. This signal relates to absolute level change from a set datum.

The signal can be viewed via the LCD display showing range, resolution, time, date and current water level.

Resolution :
AD375A - 1mm (375 pulses/rev)
AD150A - 2.5mm (150 pulses/rev)
AD100A - 0.01ft (100 pulses/rev)

Electrical:
Operating Voltage: 9.6 to 16VDC operation i.e. from SDI-12 + 12 volt supply
Output: 4-20mA current loop drive (9V to 30V DC) used as a 2-wire current loop transducer, RS232, SDI-12
Battery Backup : Internal microprocessor operation as well as data integrity is guaranteed by a factory fitted lithium battery for 3 years minimum.
Current Drain: 10uA
Accuracy: 0.01% F.S. BSL.

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

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: 270 x 170 x 200 mm
Weight: 2.0 kg

Ordering Information:
ABSOLUTE SHAFT ENCODER, 9.6 TO 16VDC, OUTPUT SIGNALS 4-20MA, 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.

AD375A ABSOLUTE SHAFT ENCODER, 375MM REVOLUTION, 1MM INCREMENTS.
AD375MA ABSOLUTE ‘MAGNETIC’ TYPE SHAFT ENCODER, 375MM REVOLUTION,
1MM INCREMENTS.
AD150A ABSOLUTE SHAFT ENCODER, 375MM REVOLUTION, 2.5MM INCREMENTS.
AD100A ABSOLUTE SHAFT ENCODER, 1FT REVOLUTION, 0.01FT INCREMENTS.

AD375Q QUADRATURE SHAFT ENCODER, MM INCREMENTS
AD37/5Q QUADRATURE SHAFT ENCODER, CM INCREMENTS
AD150Q QUADRATURE SHAFT ENCODER, 2.5MM INCREMENTS.

Q420 QUADRATURE ENCODER TO AD375A INTERFACE.