天天干夜夜爽-福利片在线观看-亚洲欧洲日韩-少妇精品无码一区二区三区-婷婷伊人综合中文字幕-一区二区视频在线播放-色婷婷精品-三级特黄-国产普通话bbwbbwbbw-怡红院成人av-日韩免费视频观看-中文字幕视频网站-亚洲乱乱-亚洲一区在线视频观看-久操社区

PH meter is a kind of commonly used instrument and equipment, which is mainly used to precisely measure the pH value of liquid medium. PH meter is widely used in environmental protection, sewage treatment, scientific research, pharmacy, fermentation, chemical industry, aquaculture, tap water and other fields. The instrument is also a necessary inspection equipment in QS and HACCP certification of food factory and drinking water plant.

For more models, please consult our sales department.