This antenna is almost 15.6 inches long and is a must for outdoor and camping usage. This is a soft flexible antenna able to withstand more 'roughness' than a stock radio antenna, all while boosting the signal of your radio significantly!
Portable pocket colorimeter LH-C10 is run at single wavelength, Portable pocket residual chlorine colorimeter is special for the analysis Cl of in the water, the concentration can extend from 0 to 10 mg/L.
The dual gas path simultaneous comparison sampling method is used to improve the accuracy of sampling, which is suitable for the performance testing of bacterial filtration efficiency of medical surgical masks by metrological inspection departments, scien