Technologies and Solutions

Overview of our Capabilities

At Carl Stuart Ltd we operate in three major areas:

• Laboratory instrumentation & consumables
• Calibration, service & spare parts
• On-line process measurement & filtration

Below is a summary of each division of the company. You can search by either product or application, using the search engine at the top right hand corner of every page.

Laboratory Division

This division can fulfil the majority of requirements of most laboratories, from the sophisticated analytical techniques used in cutting edge research and development, to the most fundamental of all measurements, such as weighing, used in virtually every laboratory. A look at our online catalogue quickly demonstrates the extent of our capabilities. The laboratory division subdivides into several categories each of which has appropriately qualified staff that are familiar with the various testing regimes.

Fundamental Laboratory Measurements

The backbone of all laboratory techniques are the fundamental measuring practices such as weighing, temperature measurement & control, water quality, liquid handling and microscopy. In this arena Carl Stuart Limited offer a wide variety of services.

Weighing

Carl Stuart Limited supply a vast range of electronic balances from all the major manufactures, facilitating weighing and more. There are balances for the counting of small parts and moisture determinations, based upon weight change. We provide our own in-house calibration facility, where all test equipment is traceable back to National Standards.

Temperature control

Carl Stuart Limited offer water bath and recirculation systems for Internal and External application temperature control from -90ºC to 400ºC. Internal Application Water bath volumes range from 5 to 40L. We, at Carl Stuart Limited, have the expertise to control a 50L Jacketed Vessel at -60ºC. For microbiological work, we have both standard and cooled Incubators, with or without carbon dioxide addition, plus a full range of climate control cabinets for Stability Testing of Pharmaceutical products and more.

Water

All laboratories use water and quality is constantly of paramount importance. From a basic still with a small output, to high volume, low conductivity Ion exchange and R.O. systems capable of producing 18 meghom water, Carl Stuart Limited can fulfil your requirements. At Carl Stuart Limited, we also competently facilitate particulate filtration and water softening, for general water use and washing machines. This includes the supply and qualification of laboratory washing machines.

Liquid Handling

With ever-decreasing volumes, most laboratories need accurate and reproducible methods in handling liquids. The use of bottle top dispensers allows for the rapid dispensing of larger amounts. For smaller volumes, Carl Stuart Limited supply anywhere from single-operation, hand-held pipettes, to programmable diluters and complete XYZ workstations, capable of transferring microlitre volumes simultaneously, such as those required in microtitre plate work.

Microscopy

Stereo, teaching, compound and industrial units with options for digital imaging. Slide storage systems are available. These are complemented by a range of Refractometers and Polarimeters.

Analytical Instrumentation and Supplies

Carl Stuart Limited provide a diverse range of analytical instrumentation and supplies, including Electro Analytical equipment such as pH, Conductivity, Dissolved Oxygen and ISE meters. This technology is also employed in instruments for Titration and Karl Fisher determination of water. Mainstream Spectroscopy instruments, both Single and Double Beam, and 21CFR11 Compliant Software is available, as well as 'Photometer' type instruments commonly employed in water testing. In addition to the balances supplied for each application, instruments for Temperature Testing, Particle Sizing, Viscometry / Rheology and Meltings Point Apparatus are also supplied. Their end analysis is only as good as the sample used. To ensure representative samples are employed, sample preparation and testing instruments such as Sieve Shakers, Certified Test Sieves and instruments for Grinding, Mixing, Homogenising samples and Sample Division are available. Specialised Analytical Systems for Environmental and Food analysis are also supplied.

Analytical Chemistry

For the analyst, Carl Stuart Limited offer products to support GC, LC, ICP and ICP/MS. These include consumables such as capillary columns, ferrules, injection ports, vials and caps, syringes, seals, injection loops, split/splitless liners, HPLC columns both standard and micro bore.

Also available are nebulizers, spray chambers, torches, RF coils and skimmer / sampler cones for ICP-MS. We also support the analyst with instrumentation and ancillary items such as gas generators, air compressors, vacuum degassers and solvent saver units.

Products for Atomic Absorption Spectroscopy (AAS), such as Lamps and Inorganic Standards, are also supplied.

Environmental Analysis

In offering testing facilities for environmental monitoring, Carl Stuart Limited not only provide equipment for laboratory analysis but also systems for the on-line measurement of many parameters that are required by the regulatory authorities, thus helping to ensure the safety of any environment.The movement towards on line measuring is an obvious progression for parameters, which have been routinely measured in the laboratory for many years now. It provides the added advantage of real time measurements in so far as process changes can be immediately spotted and corrected/adjusted accordingly. It is limited to those technologies which can withstand the rigours of a process environment.

We at Carl Stuart Limited also provide solutions for the measurement of pH, ORP, conductivity, nitrogen, Oxygen, carbon Dioxide, chemical oxygen demand (COD) and biological oxygen demand (BOD), as well as photometric measurements such as turbidity/ suspended solids and microbiological investigation, with both rapid methods and colony counting. For all of these measurements, we offer support, utilising the full extent of our understanding of the technology and calibration /service support for instruments.

Calibration, Service and Spare Parts

The services offered by Carl Stuart Limited fall into three main areas:

• Laboratory instrumentation at the customer premises
• on line monitoring instrumentation and sensors at the customer site
• in-house calibration of items small enough to be returned with a carrier

Laboratory instrumentation calibration and service at the customers' premises

This is one of the most rapidly growing sectors of Carl Stuart Limited and it is driven by the ongoing quality requirement of many laboratories. In the modern laboratory, to be compliant with current regulatory requirements, it is necessary when an instrument is new that an Installation Qualification (IQ) is carried out to confirm that the instrument is what the customer ordered and that all functions are operational. This is followed by an Operational qualification (OQ), confirming that the instrument operational parameters are within the manufactures specifications. A Performance Qualification (PQ) can be carried out as an option if the customer does not want to use their own resources, ensuring that the instrument is working within the customer's specifications and is fit for purpose. Operational qualifications / Performance Qualifications are normally required at fixed intervals throughout the life of the instrument. This can be annually or more frequently depending how critical the application is to the laboratory using the instrument.

An emerging concept is the provision of Total Lab Solutions, whereby we offer Full Contract services for all relevant instruments, in either a particular laboratory or an entire customer site. The main benefit of this type of service is that there is one point of contact for all needs and all documentation is harmonised, ensuring ease of auditability. As a TLS customer, you will benefit from the expertise of the whole team at Carl Stuart Limited for all your service/calibration and instrument/consumable requirements.

Our comprehensive in-house customer management software package allows for full traceability regarding any work undertaken and where requested, issues can be logged by customers on our website. This enables all queries or breakdowns to be handled in real time, on a 24hr- a-day basis.

On Line monitoring equipment at customer site

Many of our customers have on line measurement facilities in their process plant. It is imperative in a process environment that sensors operate correctly and are installed in a duty where they can perform within specifications. Carl Stuart Limited calibrate measuring instruments and confirm that sensors are giving the correct reading. Our capability extends to applications in the pharmaceutical/fine chemical industry, high purity water loops and beverage manufacturing. We cover parameters such as pH, Conductivity, Temperature, Turbidity, Dissolved Oxygen, Dissolved Carbon Dioxide, and Dissolved Nitrogen.

Response time is often of paramount importance when ongoing processes are concerned and our contracts reflect the response times required by customers.

In-House Calibration and repair services

Hand-held instruments that are taken into the field under normal use are, by their definition, small and lightweight. Therefore, unless there are a very large number of instruments at one location, it does not make financial sense to visit the site to carry out calibrations or repairs. Often such instruments are capable of being calibrated by the user in the field, using standard solutions. From time to time, however, instruments perform incorrectly or breakdown completely and for this event, we offer a rapid repair and return service using courier services. This results in the instrument being away from its user for the minimum amount of time possible. Carl Stuart Limited offer this service for instruments all over Europe and in particular, provide a first-rate service when validating flow rates on gas flow meters, used in Gas Chromatography.

Process Technology

Carl Stuart Limited's distinguished capabilities in the field of processing mainly relates to the processing of liquids, providing applications to industries such as food & beverage, dairy, pharmaceutical, biotechnology, fine chemicals, Active ingredients, electronics, coating and paints, inks and dyes, chemicals, water systems both high and low purity and many more. Carl Stuart Limited also supply products for the on-line monitoring of parameters such as dissolved oxygen, carbon dioxide, pH and systems for measuring BOD and COD. Our filtration capabilities extend from mesh and wedge wire screens, to nominally rated cartridge bag and lenticular filters.

Critical applications include absolute rated polypropylene filters, capable of being steam sterilised or autoclaved, with micron ranges from one to seventy. Fully validated membrane filters from materials such as PES, PVDF, PTFE, in porosities as low as .01 micron and even on occasion 0.06, although 0.45 and 0.2 micron are more frequently used for bio-burden reduction and sterile filtration. Many materials are available in both Hydrophilic and hydrophobic forms. Hydrophobic forms are generally used for liquid filtration, and hydrophilic for air filtration or gas venting applications.

In addition to filtration, Carl Stuart Limited also supply Ultra Violet products for treatment of water containing bacteria such as legionella and e-coli, cysts such as cryptosporidium and guardia and even some viruses.

Suppliers

Whilst Carl Stuart Limited is capable of supplying products from the majority of manufacturers, we do have preferred suppliers. Such companies are usually internationally recognized as performance leaders in their respective fields, have been in business for a considerable period of time and meet internationally accepted standards such as ISO. This makes vendor qualification a very straightforward process. Below is an overview of these suppliers and their capabilities.

Our Suppliers include:

Agilent, ASCO Filtri, Binder, Ceti, Chisso, Chromacol, Clean Air, Daicel, Dr. Muller (Dr M.), Ertel Alsop, Filter Housings, Filter Specialists International, GFL, Grace Vydac, GL sciences, Hamilton, IKA, Julabo, Kern, Lab Logistics Group, Meissner, Optimize, Parker, Secomam, SOTAX, Whatman, WTW, TKA, VICI.

Agilent

Agilent is known world wide for its laboratory instrumentation, particularly in the field of GC and HPLC. J&W chromatography columns, Zorbax HPLC columns, and perfect fit accessories for instrumentation, are but a few of the trade names in the Agilent stable that are so familiar to the analytical chemist. As channel partners for both their columns and supplies division, Carl Stuart stocks the full range of products required to support the extensive range of instrumentation from this major multinational company.

ASCO Filtri

ASCO Filtri manufacture a range of filter housings in stainless steel, for use in food and beverage, industrial, ink and coatings, and speciality paint applications. Housings meet the current Pressure Equipment Directive requirements.

Binder

Binder specialise in temperature control. They have a full line of drying ovens, vacuum drying ovens, Co2 Incubators, microbiological incubators, hybridization ovens, climatic chambers, and plant growth chambers.

Ceti

Microscopes

Chisso

Chisso supply Filter Cartridges, constructed of unique thermally-bonded, bi-component fibre. Chisso's filter cartridges provide strength, rigidity, and a stable filtration performance throughout its service life.

• CP - Bi-component polyethylene and polypropylene, 1-350 microns
• CP-H - Polyester for wide chemical compatibility, 1-50 microns
• BM - Absolute rated polypropylene filter, 1-15 microns, very high capacity

Chisso's classification filters ideally suited for high quality coatings and optical resin filtration.

Chromacol

For many years Chromacol have specialised in Vials and Septa for virtually every autosampler on the market. Whether you require a screw or crimp cap, manual or automatic crimping, Chromacol have a suitable product available. In recent years, Chromacol have also started supplying other consumables for the chromatography market, such as filters. The name Chromacol and its distinctive wavy line symbol are synonymous with the quality of their products. The addition of the La pha-pack range of products to their portfolio means that the range of products is unsurpassed in the industry.

Clean Air

Safety from airborne contaminents is of paramount importance. Clean Air's range of laminar flow cabinets, extraction cabinets, and biological safety cabinets in class 1, 11, 111 and 1V make the handling of hazardous materials a safe and routine procedure.

Daicel

Dr. Muller (Dr M.)

Dr. Muller (Dr M.) are recognised worldwide for their FUNDABAC and CONTIBAC vertical candle pressure filter systems for catalyst recovery and carbon removal filtration (completely contained for low OEL applications).

We provide a wide range of manual or fully automated systems with heel volume filtration, cake washing, and cake drying modes. Special features include in-situ cleaning of the filter media for long service life. Filter media include a wide range of filter cloths to meet demanding duties. FUNDABAC is designed for polishing or solids recovery modes. It’'s available in 316 SS, Hastelloy, manual or fully automated skid mounted, with plc control.

Ertel Alsop

Depth filter or sheet filter media paper (pharmaceutical grade) to fit existing Horizontal Leaf filters presses. These include a wide range of Filter press designs and engineered systems, including sludge presses for waste stream treatment. Lenticular Pak (cartridge) filters in 12inch and 16inch - DOE (double open end) or Plug-In (SOE) designs.

Sanitary filter designs (commonly called Zeta Pak, Pak, module or lenticular filters) are also offered. Medias are available in DE/Perlite/Cellulose with a wide range of designs for cell removal, polishing, and pre-coat applications. These ranges are also available with high purity Celpure media, available from 15um to 0.1um, with zeta potential for cost effective protein filtration and membrane protection.

A range of Carbon media in sheet and Pak form (Zeta Pak, module or lenticular filters), is available for decolourisation, odour reduction, and contaminant removal.

We also offer specialised media for water removal from chemical streams.

Filter Housings

Standard, custom designed, skid systems, and fully functional skid systems are offered from Carl Stuart Ltd. Working with customers to define requirements and then working with the right partner or partners, provides clients with a customised system, meeting their specific requirements.

Filter Specialists International

The FSI (Filter Specialist Inc.) range of bag filters is offered in a range of polymers and sizes to retrofit existing and new systems. These unique thermally bonded bags, with integral plastic sealing ring and monofilament bags, provide a positive sealing and consistent performance.

These bags are available in Polypropylene, Nylon, Polyester, and PTFE, and in various media configurations, such as viz. felt, micro fibre, and monofilament. Various bag formats include High capacity bags and multilayer bags with nominal and absolute ratings bag filters: 1um to 100um.

In addition, we offer a wide range of bag filter housings and hardware. FSI filter vessels are expertly engineered for reliability and ease of use. You'll find our filter vessels will make your fluid lines more productive and effective, as they are built to meet demanding ASME Code requirements in our own ASME-certified manufacturing facilities. Single-hole and multi-hole filters are available in stock for immediate shipment. FSI vessels can be custom manufactured to various international and other regulatory requirements.

GFL

Grace Vydac

GL sciences

Hamilton

Hamilton is known the world over for its first product microlitre syringes. Today, it is the acknowledged leader in the field with a range that meets the requirements of all laboratories involved in the measurement and dispensing of microlitre quantities, with absolute precision. In addition to the manual devices, there are also automated precision liquid dispensers for the industry and the high throughput laboratory, carrying out microtitre plate work in areas such as HIV testing and DNA fingerprinting. If it's accurate and precise liquid handling you require - then look no further. In recent years they have turned their knowledge of glass manufacturing to sensors for electrochemistry. Their electrochemical sensors are reliable tools for application-oriented-use and are characterised by the highest quality, long life, and competitive price.

IKA

Many laboratory processes require the mixing of reagents or samples. IKA have the most extensive range of products available today for stirring, mixing, hot plate heating, milling, homogenising, dispersing, grinding etc. They also offer process development scale reaction vessels that are fully controlled and bomb calorimeters for the determination of calorific value.

Julabo

Temperature control using recirculating liquid systems are the basis of the Julabo range of products. They include systems from a simple water bath, to large reirculating units, which can be mounted remotely and have heating and cooling capoacities of several kilowatts. Accurate temperature is often of paramount importance and at Carl Stuart, we have the facilities to calibrate instruments for measuring and controlling temperature to known standards.

Kern

Weighing is a fundamental measurement and although Kern supply a full range of analytical balances, the core of their technology is the supply of calibration weights, which are manufactured referencing known standards. Once again, Carl Stuart have the ability to calibrate analytical balances from all manaufacturers.

Lab Logistics Group

LLG is a company owned by some 25 shareholders each of whom are independent laboratory supply companies throughout Europe. Carl Stuart is a shareholder in the LLG group. Bringing individual companies together in this way enables them to have the purchasing power in the marketplace to be able to offer a full line of laboratory products, at competitive prices, whilst offering rapid deliveries. The bringing together of a large range of items in a single catalogue, which is also available on line, simplifies the purchasing of routine requirements for customers. Furthermore, it simplifies services such as consignment stocking, which is gaining in importance.

Meissner

Meissner Filtration Products offer a range of membrane filters in cartridge and disposable capsule format. Validated sterilising filters and mycoplasma removal ratings of 0.04um to70um.

Also available are a wide range of pleated surface and depth filters for pre-filtration. Media types: PP (polypropylene), PTFE, PES (Poly Ether Sulphone), PVDF (Polyvinylidene Difluoride), and GF (glass fibre) is complemented by a comprehensive range of sanitary, standard, and custom housing designs.

Optimize

Optimize is a company committed to improving the design of conventional products for HPLC and GC, with the intention of providing unbeatable performance and ease of use. This is evident in Opti-lynx, an innovative way to make new LC connections in a quarter twist. It's also evident in their replacement parts offering. Whether it's designing their own unique blend of polymers to provide the ultimate piston seal performance, or making sure that the ball and seat in a check valve are perfectly mated, nothing is overlooked in the design process.

Parker

Gas generation for the chromatography laboratory is becoming the norm for gases capable of being produced with sufficient purity and volume. Gone are heavy cylinders with all their safety requirements, to be replaced by instruments producing the high purity gases required by today's analytical chemist. Hydrogen, nitrogen, Zero air, and TOC gas generators are manufactured by Parker for the laboratory environment. Carl Stuart supply and maintain the full range of Parker gas generators.

SOTAX

Sotax specialise in tablet testing. Whether it's disintegration, friability, hardness, powder testing or dissolution in accordance with USP methods 1,2,5,6 or USP 4 flow through method, then Sotax has the system to satisfy the requirements of drug manufacturers. These include simple stand alone systems, to fully automated systems for high volume throughput. This is also of course, an area where validation is of utmost importance and Carl Stuart Ltd have personell trained in USP methods. Our technicians are fully capable of validating dissolution systems from any manufacturer.

Whatman

Whatman have been involved in separation science for many years. From their original filter discs, the GFC's and GFA's, to the extensive catalogue of bioscience products for applications in DNA and PCR and blotting techniques such as northern southern and western blot, their range is particularly comprehensive.

WTW

Whether it's in the laboratory or on line, the measurement of parameters such as pH, conductivity, BOD/COD, Oxygen, and other dissolved gases; WTW has the answer. WTW is well known in the field of environmental monitoring of both potable and waste waters. Their portable instruments are state-of-the-art with regards capability, reliability, and robustness. As a result, they have become the envy of many other maufacturers. It is this dedication to quality which keeps them at the forefront of their market.

TKA

High quality water is a requirement in all modern laboratories. TKA produce water systems which provide water at up to x microsiemens in volumes from as little as a few litres/hr to hundreds of litres/min, depending on requirements. Instruments can now be connected directly to mains supply often without pre-treatment, thus making high purity water availiable on demand to the analyst.

VICI

Vici of Switzerland have been supplying injection valves, ports, loops etc for HPLC instrumentation to LC manufacturers worldwide for many years. With ever decreasing sample volumes, the accuracy and reproduceability of loading samples onto columns has become more and more important. In addittion to valves, they also provide a full line of fittings, frits, tubing, loops, and other parts for the chromatographer.