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TurbiTechw² LR Turbidity Sensor

For your information, this turbidity sensor has ceased production. Please see the TurbiTechw² D-ISO for it’s replacement. 

The TurbiTechw² LR Sensor has been specifically designed to monitor final treated, portable and filter water. The sensor is extremely sensitive and is capable of discriminating changes in Turbidity of less than 0.1 FTU. The 90º light scatter monitoring technique makes the sensor sensitive to a wide range of particle sizes, from colloidal material through to larger particles and raw waters and the large mineral particles sometimes found in distribution samples.

The TurbiTechw² LR Sensor complies with the internationally recognised ISO7027 standard for turbidity measurement. The unique sensor design captures stray light which ensures an ultra stable zero point, this is combined with an automatic self-cleaning mechanism that prevent the build up of fouling within the sample chamber. The measurement system includes a self monitoring loop that compensates for changes in optical performance.

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

The sensor requires very little maintenance, with no special tools or training required. Calibration can be carried out against either a wet turbidity standard or using the dry calibration reference cell that is supplied with every sensor. The reference cell provide an extremely easy, repeatable method of checking the performance of the sensor without the cost and inherent errors associated with chemical standards

Dimensions (hxwxd)440 x 320 x 200 mm
Weight4.5 kg (inc 5 metres of cable)
Protection ClassIP65
Enclosure MaterialBlack Acetal Co-Polymer
Cable EntriesIntegral Cable Gland
Wetted PartsBlack Acetal, 316 Stainless Steel, Glass, Nitrile
Cable Type4 core, 2 Twisted Pair, 5 mm O/D Polyurethane Coated
Cable Length5 metres standard, 100 metres maximum
Service RequirementWiper blade replacement as required
Environmental Data
Operating Temperature0 to 50ºC
Interface to Monitor
Power Supply12 VDC from Monitor
Sensor OutputModTechw², RS485
Low Range0-30 FTU
AccuracyBetter than ±2% of measured value or ±0.02 FTU whichever is greater
Limit of Detection0.02 FTU
Minimum Operating Range0 - 3 FTU
High Range0-500 FTU
Accuracy±2% of measured value or ±0.1 FTU whichever is greater
Limit of Detection1 FTU
Minimum Operating Range0 - 50 FTU
Display Resolution0.0001 NTU from 0.0000 to 9.9999 NTU
0.001 NTU from 10.000 to 49.999 NTU
0.01 NTU from 50.00 to 500.00 NTU
Measurement Principle90° Light Scatter, ISO 7027 Compliant
Wavelength860 nm
Pressure Rating2 Bar/30 psi
Flowrate0.5 l/min to 5 l/min
It has been asusmed that 1 FTU = 1 NTU for the purposes of these range statements
Part NumberDescription
225125TurbiTechw² LR Sensor (0-30 FTU, Cable Length: 5 metres, Nitrile Wiper), inc Dry Cal Standard
227386TurbiTechw² LR Sensor (0-500 FTU, Cable Length: 5 metres, Nitrile Wiper), inc Dry Cal Standard
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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