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ColTechw² Colour Sensor

Self Cleaning Sensor for Apparent Monitoring

The ColTechw² Sensor has been specifically designed to monitor Apparent Colour in applications where a broad indication of the colour of the water is required. The self cleaning sensor is ideal for monitoring at the intake stage of drinking water processing, allowing automatic coagulant control with no need for a complex analyser.

Organic materials such as Humic Acid or metals like Iron and Manganese dissolved in water will appear as an unacceptable yellow tinge. If discoloured water is allowed to enter the water supply network customers will quickly become aware of the problem.

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  • Overview
  • General Specification
  • Measurement Specification
  • Ordering Information & Spare Parts

Measurement of colour is therefore an important element of potable water treatment control, the ColTechw² Sensor in combination with the 7300w² Monitor will provide a reliable, repeatable indication of colour levels allowing online adjustment of coagulation control packages. A high residual colour reading is a clear indicator of a coagulation control system that is not functioning correctly, and will allow the process to be optimised, enabling significant savings to be made in usage of dosing chemicals.

The sensor requires very little maintenance, with no special tools or training required. Calibration can be carried out against either a wet standard or using a reference standard.

Physical
Dimensions (hxwxd)370 x 280 x 200 mm
Weight4.5 kg (inc 10 metres of cable)
Protection ClassIP65
Enclosure MaterialBlack Acetal Co-Polymer
Cable EntriesIntegral Cable Gland
Wetted PartsBlack Acetal, 316 Stainless Steel, Glass
Process ConnectionsInlet and Bypass: ½" BSP with 12 mm Hosetail
Outlet: ¼" BSP with 8 mm Hosetail
Seal MaterialNitrile
Cable Type4 core, 2 Twisted Pair, 5 mm O/D Polyurethane Coated
Cable Length5 metres standard, 100 metres maximum
Service RequirementAutomatic Self Cleaning
Wiper Replacement Yearly (application dependent)
Environmental Data
Operating Temperature0 to 50ºC
Interface to Monitor
Power Supply12 VDC from Monitor
Sensor OutputModTechw², RS485
Measurement Characteristics
Range0-200 °Hazen
AccuracyBetter than ±2%
Resolution±1% FSD or better
RepeatabilityBetter than ±1%
Light SourceLight LED, 370 nm
Turbidity Limit100 NTU
Optical Path Length40 mm
Sensor Response Time90% of step change in 3 seconds
Pressure Rating (Depth)1 Bar
Flowrate0.5 l/min to 5 l/min
Part NumberDescription
223911ColTechw² Sensor (Range 0-200 Hazen, Cable Length: 5 metres, Nitrile Wiper)
Accessory
220372De-Bubbler with Auto Air Vent
Service Pack
201010WaterWatch2310/WaterWatch2970.TurbiTechw² LR/ColTechw² - Replacement Cleaner Arm/Wiper Blades (pack of 3)

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7300w² Monitor

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De bubbler

De-Bubbler for TurbiTechw² LR and ColTechw² Sensors

De-Bubbler for use with TurbiTechw² LR and ColTechw² Sensors

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