Products & Reviews

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…

The determination of the biodegradability should be checked before “new” chemicals are used for the first time, not only for environmental reasons but also to minimize disposal charges.The sample and a blank are stirred at a constant temperature for 28 days in closed bottles. The CO2 produced is removed from the gas space by means of an absorber so that the resulting negative pressure is a measure of the biodegradability.The c…

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.

High-performance laboratory conductivity meter with graphic display and digital recorder function, parallel display of temperature and automatic temperature compensation. A built-in datalogger and a real-time clock allows for all QA conforming functions. The optional built-in printer allows data printout on thermal paper accepted for use in official documents. 68 °F or 77 °F (20 °C or 25 °C) can be set as reference temperatu…

Routine laboratory conductivity meter with large multifunctional display, parallel temperature display and automatic temperature compensation. 68 °F or 77 °F (20 °C or 25 °C) can be set as reference temperature. Both TDS and salinity measurements are possible as well as conductivity and temperature. The ability to set different cell constants means that other special conductivity cells can be connected as well as the TetraCon®…

Standard laboratory conductivity meter with large multifunctional display, parallel temperature display and automatic temperature compensation. The datalogging capability and the real-time clock allows for all GLP functions. Data output can take place via the optional built-in printer on thermal paper accepted for use for official documents or via the built-in RS 232 digital interface via a PC or external printer. 68 °F or 7…

CR 2200 is ideal for anyone who needs to perform routine water analysis tests with small sample amounts, as 5 programs are available for digestion of 12 sample cuvettes at 212, 248 and 298.4 °F (100, 120 and 148 °C).

In addition, you can program the CR 3200 to carry out 8 of your individual digestions at freely selectable temperatures up to 338 °F (170 °C).

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).

Simply multiple: Multi 350i with combined conductivity/oxygen sensor ConOxThe new Multi 350i from WTW, Weilheim, Germany, is a must for anyone who wants to have a versatile high precision multiparameter instrument. In combination with a wide choice of sensors from the WTW program all important parameters of water analysis can be measured: pH, ORP, DO, conductivity, resistance, salinity, TDS, ISE. But there is still more:  With…