Overview
The long tube pH meter is an essential tool for industries requiring pH measurements in deep or confined spaces. Its extended probe design allows users to reach into tanks, vats, or pipelines without compromising accuracy. Unlike standard pH meters, this specialized version features a reinforced cable or rigid tube that protects the sensitive electrode while providing the necessary reach. It's particularly valuable in chemical processing, wastewater treatment, and food production facilities.
Structure and Working Principle
A long tube pH meter consists of three main components: the extended probe assembly, the cable or rigid tube extension, and the display/control unit. The probe contains a glass electrode and reference electrode that generate a voltage proportional to the solution's pH. The extended design maintains the same measurement principles as standard pH meters but incorporates structural reinforcements to prevent damage during insertion. Some models feature flexible armored cables for versatile positioning, while others use rigid stainless steel tubes for maximum durability in industrial environments.
Key Features
Extended reach capability is the defining feature, with probe lengths ranging from 30cm to over 2 meters. The meters typically offer automatic temperature compensation (ATC) to ensure accurate readings across varying conditions. High-quality models feature double junction electrodes for improved longevity in harsh chemicals. Many include data logging functions and connectivity options for integration with industrial control systems. The best units are IP67 rated for protection against dust and temporary immersion.
Application Areas
These specialized pH meters are indispensable in chemical manufacturing for monitoring reactions in tall reactors. The food industry uses them for quality control in large fermentation tanks and storage silos. Environmental applications include groundwater monitoring and wastewater treatment plants where measurements must be taken at depth. Pharmaceutical manufacturers rely on them for process validation in deep vessel systems that standard meters cannot access.
Maintenance and Precautions
Regular calibration with standard buffer solutions is crucial - at least monthly for frequent use. Always store the electrode in proper storage solution to prevent dehydration of the glass membrane. When cleaning, use appropriate solutions for the measured substances - mild detergent for food residues, specialized cleaners for chemical deposits. Avoid bending the probe excessively and protect the glass bulb from physical impact during use and storage.
B2B Procurement Guide
Industrial buyers should evaluate probe length requirements based on their deepest measurement needs. Consider the chemical compatibility of electrode materials with your process fluids. For reference, basic models start around $200, while industrial-grade units with data logging and multiple probe options can reach $800. Lead times for custom configurations may extend to 4-6 weeks from specialized manufacturers. Bulk orders typically offer 10-15% discounts.
Related Manufacturers
- 主营：全自动凯氏定氮仪、红外测油仪、台式多参数水质检测仪、离子计、光度计、重金属检测仪、BOD测定仪、食品安全测定仪、农药残留检测仪、液液萃取仪、一体化万用蒸馏仪、电厂专用硅酸根检测仪、紫外测油仪、便携式多参数水质检测、磷酸根测定仪、粗纤维测定仪、测脂肪测定仪、全自动电位滴定仪、COD测定仪、余氯测定仪、紫外多参数检测仪、溶解氧仪、水质理化箱、综合重金属检测仪、滴定仪
- 主营：[]
- 主营：压力变送器、差压变送器、流量开关、雷达液位计、电磁流量计、涡轮流量计、热式气体质量流量计、涡街流量计、金属管转子流量计、金属管浮子流量计、液体涡轮流量计、超声波流量计、玻璃管转子流量计、科氏力质量流量计、超声波液位计、吹气式液位计、磁翻板液位计、质量流量计、旋进漩涡流量计、投入式液位计、热式流量开关、视流器
- 主营：潜水泵、测试仪、密封圈、拉力计、涂胶机、滴胶机、轴承座、灌胶机、污水泵、点胶机、点胶阀、抽水机、隔膜泵、排污泵、喷火枪、骨架油封、密封垫片、煤气焊炬、机械密封件、液化气焊枪、气动滴胶阀、焊铜管焊枪、组合密封件圈、铜管气焊喷枪、半自动注胶机
- 主营：石英晶圆片、高温高压窗口片、蓝宝石晶圆片、密度计、石英器皿、石英烧瓶、螺旋管、光催化反应器、比色皿、砂芯、投料杯、半导体治具、反应釜、石英坩埚、激光保护镜片、镀膜片、激光腔体、锥形瓶、蒸馏瓶、圆底烧瓶、研磨板、压条、UV镀膜片、烧杯、酶标板
- 主营：音叉密度计、在线粘度计、液位计、音叉开关系列、分层仪
- 主营：压力变送器、压力传感器、液位变送器、磁翻板液位计、LDE电磁流量计、涡街流量计、涡轮流量计、气体流量计、金属转子流量计、污水流量计、压力表
- 主营：压力变送器、风压变送器、差压变送器、双金属温度计、磁翻板液位计、雷达物位计、流量计、高温耐磨热电偶、食品级热电阻
- 主营：水流开关、防爆流量开关、流量温度一体式传感器、液位计、涡轮流量计、涡街流量计、叶轮流量计、电磁流量计、流量传感器、温度变送器、压力变送器、温压一体传感器、温度压力一体式传感器、液位传感器、液位变送器、液位开关、油混水传感器、油中含水率监测仪、油中微水传感器、流量开关
- 主营：压力变送器、无纸记录仪、水质分析仪、流量计、液位计、超声波液位计、电磁流量计、在线ph计、涡街流量计、涡轮流量计、超声波流量计、雷达液位计、温度传感器、在线溶氧仪、在线浊度仪、多参数水质分析仪、有纸记录仪、在线余氯分析仪
- 主营：输送带、四氟膜、无缝带、电磁流量计防腐内衬、密封件、ptfe薄膜、氟塑薄膜、乙烯薄膜、车削薄膜、铁氟龙薄膜、四氟焊接膜、支持包边接头、无缝粘合机带、特氟龙无缝带、铁氟龙无缝带、无缝传送带、铁氟龙输送带、特氟龙输送带、铁氟龙胶带、聚四氟乙烯薄膜、铁氟龙膜胶带、聚四氟乙烯膜、聚四氟乙烯电子薄膜、防腐蚀特氟龙膜、铁氟龙四氟膜、宽幅铁氟龙胶带
- 主营：密度计、熔点仪
- 主营：j13w-160p、方形视镜、防爆射灯、板式液位计、液位计考克、人孔配件、玻璃平板、旋转喷头、法兰考克、焊接玻璃、卡箍球阀、旋转洗罐、皮管接头、卡箍接头、卡箍堵头、空气阻断、洁净空气、pp折叠滤芯、管道过滤器、压力表接头、三通旋塞阀、美式双卡套、法兰截止阀、片穿墙套管、旋转清洗球
- 主营：传感器、水位开关、隔膜法兰、分体式流量计、超声波液位计、磁翻板液位计、氧量检测、风机压力、余氯检测仪、防爆水位物、气体报警器、扬尘监测仪、水质检测仪、开关控制器、超声波明渠、检测分析仪、厚度检测仪、定量控制仪、蒸汽压缩空气、浑浊度检测仪、音叉液位开关、电导率测试仪、电子数显流量、高温防爆射频、氧浓度检测仪
- 主营：检测仪、传感器、热电偶、流量计、超声波液位计、磁翻板液位计、双金属温度计、磁致伸缩液位计、热电阻、压力表、水流开关、继电器开关、无纸记录仪、双色玻璃板、氧化锆分析仪、干簧管控制器、微量氧分析仪、溶解氧测定仪、高温高压密闭罐、防爆温度变送器、数显压力控制器、氧化锆氧分析仪
- 主营：油气回收检测仪、便携式活性炭碘值检测、烟花爆竹探测器、便携式明渠流量计、单人防护装备、个人剂量报警仪、氢火焰离子化检器、水质快检试剂包、手持热电风速仪、水样采样设备、便携式噪声检测仪、多参数气体检测仪、热成像泄漏检测仪、土壤重金属检测仪、移动源执法监测设备、水质指纹预警溯源仪、便携式烟气分析仪、便携式恶臭检测仪、便携式油烟检测仪、林格曼黑度检测仪、消耗臭氧层物质检测仪、应急防护包、辐射防护包、个人防护包、油气回收多参数检测仪
- 主营：培养箱、分析仪、检测仪、酸度计、酸碱浓度计、流量计、报警仪、测量仪、风速仪、蓝牙、称重系统、室内检测仪器、甲醛检测、测定仪、声校准器、采样器、消解器、机器人、振动检测分析仪、测试仪、环保第三方检测、环境检测、综合采样器、生物安全柜、浊度仪
- 主营：分析仪、采样器、监测仪、压力计、烟度计、流量计、检测箱、检测仪、直读仪、传感器、速测仪、消解仪、报警仪、测油仪、车尾检测、溶解氧仪、流量校准器、恒温加热器、水质测定仪、表面沾污仪、数字风速仪、细菌培养箱、生物培养箱、火焰模拟器、智能采样仪
- 主营：黑度仪、场强仪、检测仪、明渠流量计、孔口流量计、风速仪、检测箱、外置泵、电磁兼容、自动采样器、流速监测仪、紫外辐照仪、水质监测仪、黑烟识别器、黑球指数仪、水质采样器、水质速测箱、风速测量仪、甲醛测试仪、微电脑控制器、电磁场测量仪、微生物采样器、手持式抓拍仪、恒温恒湿设备、气溶胶采样器