PH meter 1,PH range:6.8-7.8 CL range:0.3-3 ... products have passed CE,ISO and ROHS certification.1,PH range:6.8-7.8 CL range:0.3-3 ... and services:We can provide two kinds products and services:1,We have our own brand,SHX.our products and ... the product to the amount of distribution, for example ,1 pc in a small box, 100 small boxes in a ... ,please contact with us, telephone, mail, fax.our logo PH meter