AD375MA: Absolute shaft encoder for water level

AD375MA: Absolute shaft encoder for water level

AD375MA absolute shaft encoder for accurate water level measurement in surface water and groundwater applications. It provides parallel data output via 4 to 20 mA and SDI-12, features LCD display with local configuration and supports reliable operation in harsh environments.
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Resolution
  • 1 mm (maximum error +/-1 mm)
  • 375, 150 or 100 pulses per revolution (user adjustable)
Accuracy +/-0.01 % FS
Range Typical up to +/-98 ft (+/-30 m) water head; endless wire set-up available for water level ranges exceeding 98 ft (30 m)
LCD Type 16×2 character LCD (or OLED on request for -40 °F operation)
Shaft Load Max 2 kg (adaption to higher loads available on request)
Power Supply
  • Operating: 9.0-16 V DC
  • Current Drain: 5 mA @ 12 V DC
  • Battery back-up: Internal lithium
Enclosure IP65 powder-coated aluminium
Connectors Available in ‘push-in’ spring loaded terminal or gland cable entry
Operating Conditions Temperature Range

  • -40 °F to 140 °F (-40 °C to +60 °C) (encoder only)
  • 14 °F to 140 °F (-10 °C to +60 °C) (standard LCD; -40 °F OLED version available on request)

Humidity: 95 % non-condensing

Dimensions (L x W x D) 9,6” x 5” x 6” (245 x 125 x 150 mm)
Mass 1.8 kg (3.9 lb)
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AD375MA in front perspective with front panel
AD375MA – Absolute shaft encoder for water level
Absolute shaft encoder for water level measurement
  • High-resolution measurement 1 mm
  • Absolute water level
  • Parallel data output via 4-20 mA and SDI-12 (or RS232) to connect to up to two data loggers (redundancy)
  • Controls
    • LCD display and two buttons (OLED display for -40 °F operation available on request)
    • Display: measuring range, water level and battery voltage
    • Sensor configuration
  • Slippage reduction via beaded line and matching perforated disc
  • Robust construction
  • Battery backup
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