Turbidity Probe

Guided Wave's Turbidity Probe with an additional third port can be used for Haze or Turbidity (NTU) measurements with our ClearView® db process photometer. The turbidity measurement detects solids breakthrough in your process while simultaneously measuring the transmission. The 20mm pathlength is appropriate, for example, when monitoring Saybolt color. One of the primary advantages of UV-Vis and NIR process spectroscopy is the utilization of intrinsically safe fiber optic cables to remotely locate the analyzer relative to your process. Inline probes eliminate costly and problematic fast loops and sample systems.

Turbidity Process Probe

Turbidity Probe Features

• Corrosion resistant construction

• Rugged design

• O-ring process seals

• Sealed against ambient moisture infi ltration

• High optical throughput for low noise spectroscopy

• Collimated beam for accurate absorbance measurements

• Vibration resistant design

• Haze or turbidity measurement is made by a 90° back scatter method.

This function requires a third optical fiber to return the scattered light to the analyzer.

Process-Resistant Construction

The Turbidity Probe is designed to withstand corrosive processes. The body of the probe is built from 316L stainless steel. The probe’s sapphire optical windows are sealed to the probe body with polymer o-rings chosen to be compatible with your process. On request, the Turbidity Probe can be supplied welded to an ANSI or DIN process flange. Like our other process probes, 24 inches or longer, it is also compatible with our probe extractor.

Optional Turbidity Probe Accessories

The Turbidity probe is available with optional accessories for easy adaptation to different process installation configurations.

  • Custom Flanged Probes: Facilitates direct installation of the process probe onto a T junction
  • Extractor Assembly Mechanism: Facilitates installation of the process probe so that it may be cleaned without disrupting your process
    • Rapid safe extraction of in-line probe from pressurized process streams
    • Mounts to a gate valve via 2 inch Class 300 raised face flange
    • Teflon “V” ring packing glands standard


Operating Range and Configurations

The operating range of the Turbidity Probe will be determined primarily by the choice of o-ring material. The maximum
operating temperature and pressure are 250°C and 500 psi. This probe is available in five standard lengths, and UV, visible and NIR versions.

Exceptional Light Transmission

Like other Guided Wave optical probes, the Turbidity Probe provides exceptional optical performance. Typically, peak
transmission exceeds 25%. That means more signal, lower measurement noise, and lower limits of detection.

SpecificationsTurbidity Probe
Uses / ApplicationsHaze or Turbidity, Saybolt color
Pressure Range (psi)0 to 500
Temperature Range (°C)-20 to 250 (o-ring dependent)
Probe Diameter (inches)1
Available Probe Length (inches)12;18;24;30;36
Spectral Range (nm)UV-Vis (230-750); Vis-NIR (550-1650); NIR (550-2100)
Optical Pathlength (mm)20
Standard Material316L SS
Optional MaterialsUpon request
Core Fiber Diameter (µm)600 Standard
Fiber ConnectorSMA 905
Window MaterialSapphire
Window SealPolymer o-ring materials: Viton, Kal-Rez ®  6375, others on request
MountingSwaged Fittings; custom flanges; extractor assembly mechanism
Part Number45240-1xxxx; 12985-xxxxx (flanged)
Data Sheet Doc # 1056

Contact us about your particular process installation needs for the best fit.