The HI98309 uses a conductometric measurement to determine the purity of water. The HI98309 Ultra Pure Water tester (UPW) enables users to check the purity of water, best suited for electronics and semiconductor industries. This tester is housed in durable casing that provides excellent protection against harsh industrial environments.
The HI98309 features an amperometric graphite electrode that provides better repeatability in measurements, since they do not oxidize. An amperometric measurement of EC is based on Ohm’s Law, I = V/R, where R depends on the distance between two pins and their surface. Oxidation changes both the distance and surface, which will affect accuracy. The non-oxidizing graphite pins are able to provide an optimal surface for accurate, dependable results. When calibration is needed, simply submerge the electrode tip into calibration solution and adjust the trimmer on the side of the tester.
Electrolytic conductivity, abbreviated as EC, is a measurement made in which electrical charges on atomic or larger sized particles in a medium are moved under the influence of a potential difference. EC is a measure of concentration however it is non-specic for ion type. An ion is a charged particle present in the solution that contributes to the current flow. Ions are formed when a salt such as sodium chloride is dissolved in water to form particles having electrical charges. Sodium chloride, separates into Na+ and Cl-. This is a simplified denfinition for the measurement is affected by many things such as the type of ionic compound(s) dissolved in the water; the ions mobility, the solution viscosity, temperature as well as concentration.
UPW – Conductivity tester for distilled or ultrapure water (up to 1,999 uS / cm)
In the laboratory distilled water for many studies is needed daily. The handy UPW (Ultra Pure Water) easily and quickly checks the quality of the ultrapure water with a resolution of 0.001
uS/cm. Minimal maintenance required. PWT has a probe of non-oxidizable graphite, and a built-in temperature sensor for temperature compensated readings.
- Measuring range up to 1,999 uS / cm
- Very easy to use
- Fast and accurate
- Temperature-compensated readings
|Product Name||Ultra Pure Water (UPW) Tester (0.000-1.999 µS/cm)|
|EC Range||0.000 to 1.999 µS/cm|
|EC Resolution||0.001 µS/cm|
|EC Accuracy||±2% F.S.|
|EC Calibration||Factory calibrated|
|Battery Type/Life||1.5V (4) / approximately 200 hours of continuous use|
|Environment||0 to 50°C (32 to 122°F); RH max 95% non-condensing|
|Dimensions||175 x 41 x 23 mm (6.9 x 1.6 x 0.9’’)|
|Weight||95 g (3.4 oz.)|
|Ordering Information||HI98309 is supplied with protective cap, batteries and instructions.|