we have new appearance, NO calibration required pen ph meter and conductivity meter, please check spec on it (HPH-P14, HPH-G14 & HCM-1K) , and check price on our price list web. function
we have new appearance, NO calibration required pen ph meter and conductivity meter, please check spec on it (HPH-P14, HPH-G14 & HCM-1K) , and check price on our price list web. function