VIS-NIR Dual-Beam Photometer - ClearView db photometer

As the first commercial available true dual-beam (db) filter photometer, Process Insights’s ClearView db photometer offers users an impressively low cost solution without compromising on its performance capabilities.

Equipped with Process Insights’s unique dual-beam optics that have been proven for their long term and stable operation, the ClearView db photometer also comes with a series of highly flexible configurations that allows this tool to meet many online analysis requirements for liquid and gas process streams.

Some of the typical applications of the ClearView db photometer include:

Color – ASTM or saybolt in fuels

OH (hydroxyl) number for polymer reaction end point

Water content in solvents

Haze present within diesel fuel

Also capable of analyzing the presence of turbidity

NaOH in water

ClearView db Benefits

Some of the unique benefits that are specifically associated with the ClearView db photometer include:

Stable dual-beam design

Because of this lamp, drift is dramatically reduced

Ensures long-term performance

Several enclosure options

Reduced installation costs

Six filter positions

Allow users to perform multi-parameter analysis if necessary

Optional second sample channel

Reduces overall cost for each sample point

Optional turbidity monitoring

Compatible with a wide range of flow cells and insertion probes

Low maintenance

Long life Tungsten-Halogen Lamp

Approximately 4,000 hours

Dual-beam performance

Increase functional time between required probe cleanings

Principle of Operation

The basic functional principle of photometry involves measuring the intensity of light. Although light intensity changes can be observed on various levels, they typically occur as a result of interactions between different materials. To further explain this concept, the Beer-Lambert Law is a useful theory that describes the relationship that exists between light and matter.

Furthermore, the Beer-Lambert Law states that matter absorbs light in measurable amounts at specific wavelengths, during which the degree of absorption is directly related to the concentration of matter that is exposed to the light across a known optical distance, which is otherwise referred to as its pathlength.

By understanding this concept, determining the chemical concentrations and physical characteristics of a process stream sample can be accurately analyzed. Effective analyzer design takes this principle into consideration by powerfully exploiting the science to achieve a high level of process control.

Each successful ClearView db application is defined by the calibration, which typically consists of absorption data that is directly related to the analytical values that describe the state of the process streams. Specific wavelengths for any given application can be represented by the filters that have been installed into the photometer.

In the situation that any changes occur during this process, the ClearView db measurements will instantly reflect these changes to provide users with highly accurate measurement results.

Complete Analyzer System

The three main components of the ClearView db analytical system include:

Photometer

Transmits both the source light and quantifies the light that has not been absorbed by the sample

Fiber optic cables

Carry light from the photometer to the sample and back

Ensures that the sample interface can be located from as far as 100 meters from the photometer

Sample interface

The ClearView db is compatible with an extensive selection of Process Insights sample interfaces that are both rugged and highly efficient, thereby allowing photometry to be successfully achieved in even the harshest environments.

Product Specifications

Design: Fiber Optic Dual-Beam Photometer

Number of Channels:

One sample channel

Optional second sample channel

Optional turbidity monitoring for first channel only

Number of Detectors/Filters:

Two to six, of any combination of detector types except 3 xInGaAs max

Filters:

Depends upon the customer’s specific requirements

Maximum of six individual filters available

Detector Types:

Si (450 nm – 1050 nm)

InGaAs (800 – 1650 nm)

xInGaAs (1000 – 2150 nm, TE cooled), max 3

Light Source:

Tungsten-Halogen

Approximately 4,000 hours

Spectral Range: 450 – 2150 nm

Photometric Noise: <50 μAU 450-2100 nm 1-minute rms

Photometric Drift: <500 μAU rms/ °C

Wavelength Drift: Property of filter

Response Time: One second, minimum. User settable

Fiber Size: 400, 500, or 600 μm diameter, single strand

Fiber Type Fused Silica: Ultra Low-OH (optimum range: 450 nm - 2150 nm)

Fiber Connectors: SMA 905

Outputs (analog):

Up to six for a one channel unit

Up to four per channel for a two-channel unit

4 – 20 mA, customer powered

Outputs (Discreet):

Up to six for a one channel unit

Up to four per channel for a two-channel unit

Contact closures

Inputs (analog):

Four (optional) 4 – 20 mA, isolated grounds

Local Display:

LCD Touch Screen

Color QVGA

Communications: Ethernet (TCP Modbus) standard

Enclosures:

General Purpose NEMA 4

Class I Division 2, Z-Purge, NEMA 4x

Class I Division 1, IECEx, ATEX

Power: 24 VDC, 3 A

Environmental:

0 – 45 °C, 0 – 90%, sun and rain sheltered

Dimensions:

GP – 14”x 12”x 6” [36 cm x 31 cm x 15 cm]

CID2 – 16”x 20”x 6” [41 cm x 51 cm x 15 cm]

Explosion proof – 16”x 17”x 10” [41 cm x 43 cm x 26 cm]

ClearView db Enclosure Options

Z-purge Unit Class I, Division 2ExProof Unit Class I, Division 1, IECEx, ATEXGeneral Purpose Unit