Bút đo TDS - Tổng chất rắn hòa tan Hanna HI 98301
Hãng sản xuất: Hanna
Giá: Liên hệ 0977.459.400
DiST®1 TDS Tester (ppm) - HI98301
The HI98301 DiST®1 TDS tester is a rugged and reliable pocket-sized tester that offers quick and accurate readings. The HI98301 DiST®1 has a 0.5 conversion factor that is used for drinking water, water conditioning, reverse osmosis, wastewater, laboratories, aquaculture, and aquarium applications. This meter features graphite electrodes to reduce polarization effects and an exposed temperature probe for fast response when compensating for temperature changes. Manual calibration is performed to a single point.
Exposed temperature sensor
Low range TDS 0 to 1999 ppm
0.5 EC to TDS conversion factor
Single point manual calibration
The HI98301 features an amperometric graphite electrode that provides better repeatability in measurements since the electrode does not oxidize. An amperometric measurement of TDS 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 DiSTs 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.
TDS (total dissolved solids), is a method used to determine solid content in a solution. To determine TDS, the solution whose volume is known is evaporated and the residue weighed. A conductivity measurement is commonly used to estimate TDS (Total Dissolved Solids) based on the assumption the solids are predominantly ionic in nature and the relationship between the dissolved ions and conductivity is known. TDS uses units of mg/L (ppm), or g/L. On some meters, the user can input the TDS factor for the conversion. On more basic units the factor is automatically set to 0.50.
TDS = EC @ 25oC x factor
For example: 100 μS/cm conductivity is a TDS of 50 ppm when the factor is 0.5.
Exposed Temperature Probe
Automatic Temperature Compensation (ATC)
||1999 ppm (mg/L)
||1 ppm (mg/L)
||manual, one point
||automatic from 0 to 50°C (32 to 122°F)
|TDS Conversion Factor
||1.5V (4) / approximately 200 hours of continuous use
||0 to 50°C (32 to 122°F); RH max 95% non-condensing
||175 x 41 x 23 mm (6.9 x 1.6 x 0.9’’)
||78 g (2.7 oz.)
||HI98301 (DiST®1) is supplied with protective cap, screwdriver, batteries and instructions.