在线pH计PHG-21C

评测依据

• review_count：450
• rating_avg：4.4
• brand_reputation：0
• merchant_count：0
• price_range：[2000,4999]
• dimension：best_value
• sources：["DeepSeek"]
• time_range：{"from":"2026-06-26 01:12:30","to":"2026-06-26 01:12:30"}
• intros：{"brand_intro":"雷磁（Leici）是上海仪电科学仪器股份有限公司旗下品牌，成立于1953年，是中国最早的电化学分析仪器制造商之一。品牌专注于pH计、电导率仪、溶解氧仪等实验室及在线分析仪器。雷磁以\"国产替代\"为己任，产品性价比高、操作简便，广泛应用于国内中小型水厂、环保监测站及高校实验室，是国产在线pH计的领军品牌。","product_intro":"PHG-21C在线pH计是一款经济型工业变送器，采用高阻抗前置放大器，测量稳定。配备LED数码管显示，清晰易读。支持手动或自动温度补偿，具有上下限报警功能。防护等级IP65，适合一般工业环境。输出4-20mA标准信号，可连接PLC或记录仪。特别适合中小型水处理、冷却循环水及水产养殖等对成本敏感的场合。","key_specs":{"测量范围":"pH 0-14","精度":"±0.05 pH","温度补偿":"手动/自动（0~100℃）","防护等级":"IP65","输出信号":"4-20 mA","电源":"220 VAC 或 24 VDC"}}
• alt_products：[{"product_name":"在线pH计PHG-21C","brand":"雷磁","model":"PHG-21C","price":2800}]
• kol_quotes：["雷磁的PHG-21C是小型水厂最实用的pH计，没有之一。","国产仪器能做到这个稳定性，已经非常不错了。"]
• scoring_breakdown：[{"source":"word_of_mouth","score":82.9,"weight":0.15,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"用户普遍认为性价比极高，适合预算有限的场合。操作简单，基本功能齐全，稳定性满足一般工业需求。部分用户反映电极寿命中等，需定期清洗。售后服务响应快，配件价格低廉。在中小型水厂和养殖场中口碑良好，是国产替代的首选之一。","source_count":0}},{"source":"objective","score":81.81233244414805,"weight":0.6,"confidence":0.5,"details":{"rating_avg":4.4,"price":2800,"wom_score":82.9}},{"source":"user_review","score":88,"weight":0.15,"confidence":1,"details":{"rating_avg":4.4,"review_count":450,"source":"product_reviews_aggregate"}},{"source":"expert","score":82,"weight":0.1,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"sample":["雷磁的PHG-21C是小型水厂最实用的pH计，没有之一。","国产仪器能做到这个稳定性，已经非常不错了。"]}}]
• method_version：v2
• search_visual：null