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4690 Low Range Turbidity System

Brand: ABB Group
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The measurement of turbidity is a critical measurement in drinking water as it is used to indicate water quality and filtration effectiveness (for example, whether disease-causing organisms are present). ABB's 4690 range of turbidity systems have been designed specifically for the measurement of turbidity throughout the potable water treatment process.

Whichever of the two measurement ranges you choose, low range (0 to 40 NTU) or higher range (0 to 400 NTU), you can benefit from reliable, accurate turbidity measurement with automatic optical cleaning and dry standard calibration verification.
Features
  • Flow-through turbidity design
    • fast response to process turbidity changes due to minimal sample residence time
  • Automatic sensor cleaning
    • reduces maintenance requirements
    • optimizes performance sensitivity
  • Secondary standards for calibration
    • accurate, repeatable, simple, safe
    • realize significant cost savings by reducing the use of primary standards
  • Reliable and accurate measurement
    • ultralow back scatter for accurate measurement of low turbidity values
    • automatic bubble rejection to compensate for erroneous readings due to degassing

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Specifications

Brand

Mounting

  • Wall-mount
  • Panel-mount
  • Pipe-mount

Range

  • High range 0 to 400 NTU
  • Low range 0 to 40 NTU

Linearity

  • Analyzer: ±0.1% FSD
  • Sensor max. < 1.0%

Accuracy

  • Display: ±0.2% of reading, ±1 digit
  • High range: ±5% of reading or 0.3 NTU
  • Low range: ±2% of reading

Repeatability

  • 200 to 400 NTU: 2%
  • 0 to 200 NTU: < 1%

Response Time

  • T90 < 1 min at 1 l/min-1 (0.26 gall [US]/min-1)

Flow Rate

  • 0.5 to 1.5 l/min (0.13 to 0.39 gall [US]/min)

Limit of Detection

  • High range: 0.3 NTU
  • Low range: 0.003 NTU

Operating Temperature

  • Analyzer: –20° to 55° C (–4° to 131° F)
  • Sensor: 0° to 50° C (32° to 122° F)

Storage Temperature

  • Analyzer: –25° to 55° C (–13° to 131° F)

Sample Pressure

  • Up to 3 bar (43.5 psi)

Humidity

  • Up to 95% RH non-condensing

Material of Construction

  • Cell body unit: Black POM (Polyoxymethylene) Copolymer
  • Wiper unit: EPDM
  • Cell body unit: Teflon
  • Cell body unit: Nickel plated brass
  • Cell body unit: Polyamide 6
  • Cell body unit: Epoxy preform (cured): Uni-forms 5034-00
  • Cell body unit: Spectrosil 2000 fused silica
  • O-ring: Nitrile
  • Wiper unit: 2-part Epoxy Adhesive (cured)
  • Wiper unit: Black Polycarbonate, 10% glass fibre filled
  • Wiper unit: Stainless Steel (SS 316 S13/S11) w/ Chemical Black
  • Wiper unit: Silicone grease

Display

  • 5-digit x 7-segment backlit LCD

Power Supply

  • 100-130 V, 200-260 V, 50/60 Hz

Power Consumption

  • < 6 VA AC

Documentation

Brochure

Catalog

Certificate

Manual

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