OMA Chlorine Process Analyzer with Flow Cell, Chlorine Analyzer

Chlorine Process Analyzer

Harnessing the power of full-spectrum acquisition, the OMA measures chlorine concentration from high percent levels to trace ppm with seamless accuracy.

To measure chlorine concentration, the OMA detects the distinctive absorbance curve of pure Cl2 and mathematically isolates this structure from the total sample absorbance and correlates the intensity of this curve directly to real-time chlorine concentration.

Various industrial processes require continuous monitoring of chlorine compounds’ concentrations for healthy operation. The connecting concern between all these applications is that the monitoring instrument is proofed against the highly corrosive chlorine compounds. Additionally, as some of these compounds are notorious for toxicity and/or explosiveness, chlorine compound analysis systems must be designed to prioritize operator safety.

The unique advantages of the OMA Chlorine analyzer:

  • Continuously measures up to 4 chemicals’ concentrations using dispersive UV-Vis absorbance spectroscopy
  • Totally solid state build with no moving parts — modern design for low maintenance
  • Ultra-safe fiber optic design with dedicated sample flow cell — no toxic/corrosive sample fluid in analyzer enclosure
  • Long-lifespan xenon light source (avg. 5 years)
  • Custom (per-application) sample conditioning design with Teflon wetted parts to withstand long-term corrosion
  • Decade of field-proven performance in the world’s harshest industrial environments

Request a Quote
Contact Us

Chlorine Absorbance Spectrum

To measure chlorine concentration, the OMA detects the distinctive absorbance curve of pure Cl2 and mathematically isolates this structure from the total sample absorbance. In accordance with Beer-Lambert Law, the OMA correlates the height of this curve directly to real-time chlorine concentration.

Absorbance Curve: Chlorine

Absorbance (AU)
Wavelength (nm)


All OMA models are equivalent in function and performance with identical electronic configurations. The models vary by form factor and materials of construction, each intended for a unique use case.



Wall-mounted process analyzer

  • Indoor/outdoor use
  • ATEX, Class I Div 1/2, GOST...
Learn more


Suitcase process analyzer

  • Carry from site to site
  • Rugged suitcase enclosure
Learn more


Rackmount process analyzer

  • Fits standard 19" rack
  • Ideal for lab/shelter
Learn more

Explosion-Proof Models

The OMA-300 is offered in two explosion-proof formats:

Exp (Purged) Explosion-Proof OMA-300


Eexp systems are purged and pressurized using a certified air-purging device. This method ensures that toxic/explosive gas is not allowed to accumulate inside the enclosure and is ideal when instrument air is available.

Exd (Cast Aluminum) Explosion-Proof OMA-300


Eexd systems are contained within certified explosion-proof cast-aluminum enclosures. This method is more practical if the installation is remote or utilities are unreliable.

Sampling: Chlorine Process Analyzer

The OMA is built for direct analysis of the hot/wet sample, thus simplifying the scope of the sample system and retaining high sample integrity. From our vast experience in sampling design, we know that applications can be similar but are rarely identical. For this reason, we design and build sample conditioning systems on a project basis, working from the process to the drawing board.

Specifications: Chlorine Process Analyzer

Note: All performance specifications are subject to the assumption that the sample conditioning system and unit installation are approved by Applied Analytics. For any other arrangement, please inquire directly with Sales.

Measurement Principle Dispersive ultraviolet-visible (UV-Vis) absorbance spectrophotometry
Detector nova II™ UV-Vis diode array spectrophotometer
Spectral Range 200-800 nm
Light Source Pulsed xenon lamp (average 5 year lifespan)
Signal Transmission 600 μm core 1.8 meter fiber optic cables
Other lengths available
Path Length Application-dependent
Sample Conditioning Custom design per application
Analyzer Calibration If possible, analyzer is factory calibrated with certified calibration fluids; no re-calibration required after initial calibration; measurement normalized by Auto Zero
Reading Verification Simple verification with samples and self-check diagnostic
Human Machine Interface Industrial controller with touch-screen LCD display running ECLIPSE™ Software
Data Storage Solid State Drive
Analyzer Environment Indoor/Outdoor (no shelter required)
Ambient Temperature Standard: 0 to 35 °C (32 to 95 °F)
Optional: -20 to 55 °C (-4 to 131 °F)
To avoid radiational heating, use of a sunshade is recommended for systems installed in direct sunlight.
Sample Temperature Standard: -20 to 70 °C (-4 to 158 °F)
Optional: up to 150 °C (302 °F) with cooling extensions
Contact AAI for temperatures above 150 °C (302°F)
Sample Pressure Using standard flow cell: 206 bar (3000 psi)
Electrical 85 to 264 VAC 47 to 63 Hz
Power Consumption 45 watts
Standard Outputs 1x galvanically isolated 4-20mA analog output per measured analyte(up to 3; additional available by upgrade)
2x digital outputs for fault and SCS control
Optional Outputs Modbus TCP/IP; RS-232; RS-485; Fieldbus; Profibus; HART;
Select analyzer type: OMA-300 Wall-Mounted Analyzer
OMA-206P Portable Analyzer
OMA-406R Rackmount Analyzer
Chlorine Accuracy
Example ranges below. Custom ranges available.
0-100 ppm ±5 ppm
0-10,000 ppm ±2% full scale or 5ppm*
0-100% ±2% full scale
*Whichever larger.
Standard Design General Purpose
Available Options ATEX, IECEx, EAC, PESO, JPN
Please inquire with your sales representative for additional certifications (CSA, FM etc.).

Resources: Chlorine Process Analyzer

Request a Quote
Newsletter Signup