Products & Reviews

All WTW Technical buffers are certified accurate and are NIST/DIN traceable   The new buffer bottles from WTW: easy to dispense easy to use reliable calibration

The pH/mV and ionmeter pH/ION 340i offers the highest degree of flexibility possible. For pH measurements the instrument can be calibrated manually or automatically and offers simultaneous display of pH and temperature. For measurements with ion-selective electrodes the pH/lON 340i offers concentration display in mg/l. Direct display in mV to ±999.9 mV in 0.1 mV steps; and to ±1999 mV in 1 mV steps. Of course, even in these…

The FS 3700 Automated Chemistry Analyzer is an advanced continuous flow analyzer designed to improve laboratory productivity by automating wet chemistry test procedures.

The OPTi ® Digital Handheld Refractometer is a truly portable instrument that fits in the palm of your hand, and is capable of giving you over 10,000 readings on just 2xAAA batteries. It features a stainless steel prism dish which rapidly stabilises sample temperature, a durable IP65 rated body, and a clear LCD display. 

The Aurora 1030C TOC Analyzer processes aqueous samples for analysis of the total organic carbon (TOC), total inorganic carbon (TIC), and non-purgeable organic carbon (NPOC) content of the samples. Samples containing 100 ppb to 30,000 ppm of organic carbon can be analyzed. The Aurora 1030C supports USEPA-approved methods, Standard Methods, ASTM, DIN/ISO/CEN, and EU Methods. Depending upon the protocol employed, up to 300 samp…

The 910 colorimeter is a rugged, waterproof, single parameter instrument for the measurement of COD (chemical oxygen demand).   The EPA-approved COD test is useful for performing rapid, frequent monitoring of treatment plant efficiency, and results allow quick response to changing conditions in the waste stream while the traditional BOD5 test takes 5-days to determine results. The instrument features a large, backlit dis…

Analyze the most challenging real-world samples with complete confidence using the Model 1020A TOC Analyzer. Its advanced catalyst technology and approved combustion method is the best analytical technique for accurate and reproducible measurement of dirty, salty, or particulate-laden samples. With its easy operation, reliability, space-saving design, wide linear range, and outstanding accuracy, the Model 1020A delivers unmatc…

The Flow Solution® IV+ (FS IV+) is a powerful automated chemistry analyzer for performing high throughput continuous flow ion analysis methods. The FS IV+ supports and performs two types of continuous flow analysis techniques: segmented flow analysis (SFA) and flow injection analysis (FIA). The FS IV+ consists of a 360-position autosampler, a 24-channel peristaltic pump, a power base module (with 4 independently controlled hea…

pH 315i, pH 330i, pH 340i Robust Waterproof (IP 67) Large silicone keys WTW handheld pH meters are optimized for use on-site and field use, but can also be used in the laboratory. In particular the pH 340i, with its optional line power supply and serial interface, is suitable for applications in which precise measurements are required both in the laboratory and the field. WTW handheld pH meters are available in three ve…

The inoLab® benchtop meters of WTW, Weilheim, Germany, have been relaunched in April 2004. pH, DO, conductivity and multi-parameter instruments show not only a new colour but also enhanced functions and additionally, the family will have two new members, the new inoLab® pH/ION 735 and the high-performance inoLab® pH/ION/Conductivity 750 with two high-impedance inputs and an 8-pin socket for conductivity cells. So for almost  a…

The OI Analytical CNSolution™ FS 3100 is a flexible, safe, high-throughput, multifunctional automated cyanide analyzer. It incorporates a single- or dual-channel analyzer, WinFLOW software, and a 90-position random access autosampler. The FS 3100 uses an innovative gas diffusion ligand-exchange procedure coupled with a highly-sensitive Expanded Range amperometric detector to measure available cyanide. With an added UV irradiat…

Eclipse Purge-and-Trap Sample Concentrator - The Gold Standard In Volatiles Analysis The Eclipse 4660 Purge-and-Trap Sample Concentrator processes samples for analysis of volatile organic compounds (VOCs) by gas chromatography (GC) or gas chromatography/mass spectrometry (GC/MS). Innovative, patented components within the Eclipse significantly improve sample processing steps of the purge-and-trap technique. A key technology is…

Biochemical oxygen demand (BOD) determination is still one of the most important parameters in water resource management. It can be used to evaluate the impact of biodegradable substances in waters and waster water. With its OxiTop ® systems, WTW offers a unique, modular and mercury-free instrument system. It is not only suitable for BOD determination, but also for measuring biodegradability and deple-tion.The advantages of Ox…

Complete packages for 6 or 12 simultaneous measurementsMeasurement using OxiTop ® is based on pressure measurement in a closed system: microorganisms in the sample consume the oxy-gen and form CO 2 . This is absorbed by NaOH, creating a vacuum which can be read directly as a measured value in mg/l BOD.The used sample volume regulates the amount of oxygen available for a complete BOD. Measurement ranges of up to 4,000 mg/l can…

Complete package for 6 or 12 simultaneous measurements – For a larger number of samples and with simple sample measurement OxiTop ® Control is the logical further development of the successful OxiTop ® system using software-controlled functions and infrared interface to communicate with a handy controller, the OC 100. This system enables the simultaneous and grouped start, management, storage and tracking of 100 measuring head…

common featuresSimultaneous sample management with option of grouping up to 100 OxiTop ® -C measuring heads.Data call-up of one parallel sample with statistical evaluation and as individual data.Automatic calculation and graphical display of BOD value.Data transfer even through glass doors.Protocol and documentation of data via Achat OC commu-nication program in combination with a PCGLP and AQS with inspection intervals for ca…

Instead of the display and keys, the OxiTop ® -C measuring head has an infrared interface with which it communicates with Controller OC 100 or OC 110. By "e;pointing"e; the controller at an OxiTop ® -C measuring head it can be identified and started, data can be called up or deleted and sampling progress can be displayed.Each measuring head has its own identification number; this means that manual identification of samples is…

Stirrers IS 6 and IS 12 have been specially developed for BOD measurement with the OxiTop ® system. Software-controlled speed regulation prevents the magnetic stirrer bar from getting caught or wobbling. The speed is selected so that an optimal gas exchange with the sample takes place. The stirrer is maintenance-free and non-wearing as it contains no moving parts. The IS 6-Var model has been specially developed for use wit…

Determination of anaerobic degradation processes: biogas determinationAnaerobic degradation processes take place in the absence of oxygen. In order to be able to fill the gas space above the sample with inert gas the measuring bottle has a septum sealed nozzle. When anaerobic degradation has taken place the dissolved CO 2 can be driven off and then removed from the gas space by means of a CO 2 absorber. The resulting pressure…

Microbiological growth and stress investigations: determination of the respiration rate (aerobic/anaerobic measuring operation)The use of special measuring bottles with a septum sealed nozzle allows the inter-ference-free addition of substrates and solutions. Pressure alterations could indicate a reduction in oxygen concentration, for example, which could make the addition of oxygen or air necessary (possibly other gases as we…

Thermostat box with forced air circulation for 68 °F (tolerance 67.1 - 68.9 °F / 20 ±0.5 °C)OxiTop® Box is a benchtop model with hinged clear-view cover which can accommodate a maximum of either 12 OxiTop ® simultaneous measurements or 20 Karlsruhe bottles.The chamber is equipped with a connection for an IS 6 or IS 12 stirrer.A special compartment is provided for thermostatting 6 methylene blue samples.The box is made of non-c…

The investigation and monitoring of biological cleaning treatment processes are becoming more and more important with respect to the environmental requirements such as wastewater treatment, soil remediation and waste treatment.Biological tests are often in the foreground as well as the usual physicalchemical measuring methods. In order to determine the biodegradability of foodstuffs, pollutants, harmful substances or waste sub…

Soil respiration measurements are used for forecasting, surveyingand checking remediation work, for biodegradability measurements of substances (pesticides, fungicides, fertilizers, etc.) as well as for carrying out toxicity tests.This determination is possible with the OxiTop® Control System and special, practically-tested measuring vessels in a very accurate, simple and favorably-priced way.The expenditure for personnel and…

WTW offers a wide range of Ion-Selective Electrodes and instruments. Series 500 electrodes are used in combination with a separate reference electrode. And now WTW introduces our Series 800 quality combination ISE’s! These precise electrodes combine a reference and ion selective electrode in one unit. The convenience of this design allows for ease of use even in small sample volumes.

CR 4200 is the right choice for anyone who needs to perform multiple tests simultaneously, such as COD (298.4 °F/148 °C) and total-N (248 °F/120 °C), as the two thermoblocks for 12 cuvettes each can be controlled separately. It also has memory for 8 of your own user-defined programs with free temperature selection up to 338 °F (170 °C).