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Liquid Analytics
Liquid Analytics groups the instruments used to measure the chemistry of water and process liquids: sensors, transmitters, online liquid analyzers, laboratory instruments and the reagents and spares they consume. ABB makes up the largest share of the listings, followed by Hach, LAR Process Analysers, Endress+Hauser, Sitelab and JUMO. Seven Star LLC supplies these liquid analysis products from Muscat to utilities, refineries and process plants in Oman and the GCC.
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Category guide
About Liquid Analytics
Liquid Analytics groups the instruments used to measure the chemistry of water and process liquids: sensors, transmitters, online liquid analyzers, laboratory instruments and the reagents and spares they consume. ABB makes up the largest share of the listings, followed by Hach, LAR Process Analysers, Endress+Hauser, Sitelab and JUMO. Seven Star LLC supplies these liquid analysis products from Muscat to utilities, refineries and process plants in Oman and the GCC.
Three sub-categories of liquid analysis equipment
Liquid Analysis Sensors holds the measuring elements that sit in the liquid: pH and ORP electrodes, contacting and toroidal conductivity cells, dissolved oxygen and free chlorine sensors, in insertion, immersion, flow-through and hot-tap retractable styles.
Liquid Analytical Systems covers the transmitters and complete analyzers: single and multi-parameter transmitters, online analyzers for silica, sodium, hydrazine, fluoride and total organic carbon, turbidity and oil-in-water monitors from Galvanic, titrators and process analyzers from Metrohm, and UV fluorescence analyzers from Sitelab for petroleum hydrocarbons.
Liquid Analytical Accessories contains what these instruments use up or wear out: reagents and reagent sets, pH buffer solutions, test ampoules from CHEMetrics, hollow cathode lamps from AMETEK, and pump, reactor and UV lamp spares for TOC analyzers from LAR Process Analysers.
Where liquid analyzers are used
In power and desalination plants the water and steam cycle is watched with conductivity, pH, dissolved oxygen, silica, sodium and oxygen scavenger measurements, because small amounts of contamination damage boilers and turbines. Water and wastewater plants rely on pH, chlorine, dissolved oxygen, turbidity and organic load. Oil and gas sites measure oil in produced water before discharge or reinjection, and refineries check salt in crude and effluent quality. Rosemount and Forbes Marshall instruments are listed for several of these duties.
What to send for a liquid analyzer quotation
Name the parameter and range, the liquid and its temperature, pressure and solids content, the mounting style, the signal output and any area classification. For spares and reagents the manufacturer part number and the analyzer model are enough. We check the configuration against the manufacturer documentation and suggest the manufacturer’s successor when a model is obsolete.
What to include in your inquiry
These details let us quote the right item the first time.
- Parameter (pH, conductivity, dissolved oxygen, chlorine, turbidity)
- Measuring range
- Process pressure and temperature
- Installation: inline, immersion or flow-through
- Transmitter model the sensor must work with
- Cable length
Missing some of them? Send what you have. A nameplate photo or an old part number is enough to start.
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Request a Quote for Liquid Analytics
Looking for a specific model, part number or brand in Liquid Analytics? Send us your requirements and quantities. Seven Star LLC sources genuine industrial equipment for customers across Oman and the GCC and replies with a formal quotation.
- Genuine OEM products
- Supply across Oman & the GCC
- Formal quotation from our sales team
Free, no-obligation quotation · takes about 1 minute
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Frequently Asked Questions
When is a sensor with a transmitter enough, and when do I need a wet-chemistry analyzer?
Parameters such as pH, ORP, conductivity, dissolved oxygen and free chlorine are measured directly by a sensor in the liquid, connected to a transmitter. Parameters such as silica or phosphate have no direct sensor at the required level, so an online analyzer takes a sample, adds reagents and measures the color change. Analyzers therefore need reagents, a sample line and a drain, which sensors do not.
Which measurements are normally found on a power plant water and steam cycle?
The usual set is specific conductivity and cation conductivity, pH, dissolved oxygen, silica and sodium, often with an oxygen scavenger measurement such as hydrazine. Sampling points are typically on condensate, feedwater, boiler water and steam. The exact list comes from the plant chemistry guideline, so send that table with your inquiry and we match each point to a sensor or analyzer.
Can I connect a sensor from one manufacturer to a transmitter from another?
Sometimes. A conventional analog pH or ORP electrode produces a millivolt signal that most transmitters accept, provided the connector and the temperature element type agree. Conductivity cells need a transmitter that accepts their cell constant. Digital sensors use manufacturer-specific protocols and normally work only with the matching transmitter family. Send both model codes and we check compatibility in the manufacturer documentation.
How is oil in water measured for produced water and effluent?
Two approaches are common. Laboratory and field instruments based on UV fluorescence extract the hydrocarbons with a solvent and measure the fluorescence of the aromatic compounds, with the result calibrated against the reference method named in the discharge permit. Online monitors measure continuously in the line or in a side stream using optical techniques. State the required range and the reference method in your inquiry.
What data should an inquiry for liquid analysis equipment contain?
The parameter and measuring range, the liquid and its temperature, pressure, conductivity and solids content, the mounting arrangement (in-line, immersion, flow-through or retractable), cable length, output signal and communication protocol, power supply and area classification. For replacement parts, reagents and sensors, give the manufacturer part number and the model of the analyzer or transmitter they belong to.