Forbes Marshall FM TOC101 Online TOC Analyser

Overview

The Forbes Marshall TOC101 (FM TOC101) is an online Total Organic Carbon (TOC) analyzer built for continuous monitoring of ultra-pure water and wastewater processes. Using UV persulphate oxidation to break down organic carbon compounds for measurement, it gives process and utility operators a real-time indicator of water purity without the delay of sending samples to a laboratory. TOC has become one of the most widely used single indicators of organic contamination, because it captures the combined effect of many individual organic compounds in one number that can be trended, alarmed and reported.

As a single-channel, automatically calibrating analyzer, the Forbes Marshall TOC101 is designed to run continuously with minimal operator intervention, including built-in auto-cleaning to reduce fouling-related downtime. As a trusted Forbes Marshall instrumentation supplier, Seven Star LLC supplies the FM TOC101 to power, pharmaceutical, desalination and process water facilities across Muscat, Sohar, Salalah and the wider GCC, together with application support for sample conditioning and installation.

Operating Principle

The Forbes Marshall TOC101 oxidizes organic carbon in the sample using UV persulphate oxidation, converting organic compounds into carbon dioxide that is then measured to determine total organic carbon concentration. In this well-established technique a persulphate reagent is added to the sample and exposed to ultraviolet light; the UV energy activates the persulphate to form highly reactive radicals that attack organic molecules and convert their carbon to CO₂. Because the reaction takes place in the liquid phase at moderate temperature, UV persulphate oxidation is particularly effective for clean and moderately loaded water streams.

The analyzer reports results with a resolution of 0.001 mg/L and completes a full response cycle in 7–8 minutes, fast enough to catch a developing contamination trend before it becomes a batch-quality or process-purity problem. Automatic calibration routines maintain measurement accuracy over continuous operation without requiring frequent manual recalibration. The practical result is an unattended, repeatable TOC value delivered several times per hour, compared with the one or two grab samples a day that a laboratory programme typically provides.

Engineering Design of the Forbes Marshall TOC101

The FM TOC101 measures TOC concentration across a 0–10,000 ppm range with an accuracy of ±1%, covering everything from ultra-pure water monitoring at the low end to more heavily contaminated wastewater streams at the high end. Results are shown on a digital display, and the analyzer’s auto-cleaning function helps keep the optical and flow-path components free of fouling during continuous unattended operation. It operates on a standard 230 VAC supply across a 5–40°C ambient temperature range.

As a single-channel design, the Forbes Marshall TOC101 is dedicated to one sample point, which keeps the flow path simple and avoids the cross-contamination and stream-switching delays of multi-stream analyzers. In a typical installation the analyzer is mounted in an analyzer shelter or plant room close to the sample tap, with a short, continuously flowing sample line so that the reading represents the current process condition. In hot climates such as Oman, the 5–40°C operating range means the analyzer should be installed in a ventilated or air-conditioned space rather than in direct sun.

Key Features

The Forbes Marshall TOC101 combines a proven oxidation technique with features aimed at continuous, low-maintenance service:

• UV persulphate oxidation converts organic carbon to CO₂ for reliable TOC measurement.
• A wide 0–10,000 ppm measurement range covers both high-purity water and contaminated wastewater.
• Accuracy of ±1% supports process control and compliance reporting.
• A resolution of 0.001 mg/L allows small changes in water purity to be seen and trended.
• A 7–8 minute response cycle provides near real-time warning of contamination events.
• Automatic calibration maintains accuracy without frequent manual intervention.
• Auto-cleaning minimizes fouling of the optical and flow-path components and reduces downtime.
• Single-channel continuous operation with a digital display and a standard 230 VAC supply simplifies installation.

Industrial Applications

The Forbes Marshall TOC101 is specified for continuous water-purity monitoring in power plant boiler feedwater and condensate systems, pharmaceutical purified-water and water-for-injection loops, and industrial wastewater treatment processes across Muscat, Sohar and Salalah, where organic contamination directly affects product quality, equipment corrosion risk or regulatory compliance. In condensate return systems, for example, a rise in TOC can reveal oil or process ingress early enough to divert the condensate before it reaches the boiler.

With engineering support in Muscat, Seven Star LLC supplies the FM TOC101 on request across the GCC’s power, pharmaceutical, desalination and process water sectors. Its continuous online operation gives plant operators an early warning of organic contamination events — whether from a process upset, seal failure or source-water change — well ahead of what periodic laboratory sampling would catch, supporting faster corrective action. Typical users include RO desalination plants monitoring permeate quality, food and beverage plants checking utility water, and effluent treatment plants reporting organic load in the Sohar and Salalah economic zones.

Technical Specifications

The key specifications of the Forbes Marshall TOC101 online TOC analyser are summarized below:

Request a Quote for toc101

To specify the Forbes Marshall TOC101 for your plant, submit a formal RFQ to Seven Star LLC with your water type, expected TOC range and sample conditions. Our instrumentation division will confirm the configuration, check current availability and lead time, and provide the Forbes Marshall technical datasheet for your engineering review. Backed by manufacturer datasheet documentation, we support you from selection through installation and commissioning — contact us today for pricing, availability and technical support.

Browse the full Forbes Marshall range or see more Liquid Analytical Systems products supplied by Seven Star LLC in Oman and the GCC.

See also: Forbes Marshall FLOWIRL 8400 Vortex Flowmeter.