工作原理：
该COD在线监测仪采用重铬酸钾法测COD：水样、重铬酸钾、硫酸银溶液（作为催化剂使直链芳香烃化合物氧化更充分）和浓硫酸的混合液在消解池中被加热到175℃，在此期间铬离子作为氧化剂从VI价被还原成III价而改变了颜色，颜色的改变度与样品中有机化合物的含量成对应关系，COD在线监测仪通过比色换算直接将样品的COD显示出来。
主要干扰物为氯化物，加入硫酸汞形成络合物去除。
仪器特点：
● 经典重铬酸钾氧化与效率高的消解相结合，符合中国国标的铬法COD测试原理。
● 该COD在线监测仪配备准确的光学计量系统，且具有自动校准功能，测量更准确。
● 可连接哈希sc200及sc1000控制器，扩展性好。
● 10~5000mg/L三档量程自动切换，无需判断水样COD所在量程。
● 该COD在线监测仪优化的内部结构使在线数据与实验室数据对比更易行。
● 具有自动清洗功能，搭配活塞泵技术和抗腐蚀的管路设计，维护量更低。
技术指标
测试方法 重铬酸钾高温消解，比色测定
测试量程 10～5,000mg/L
示值误差 (邻苯二甲酸氢钾试验)±8%
重复性 ≤3%
零点漂移(24h） ±5mg/L
量程漂移(24h） ±10mg/L
消解时间 自动，3、5、10、20、30、40、60、80、100 或120分钟左右可选
测量间隔时间 连续测量、1~24小时间隔测量、触发启动测量，自定义间隔
校准 可选择不校准，自动校准或用户自定义校准（最多5点）
输出 2路电流输出：0/4-20 mA，最大负载500Ω
2个多功能输出继电器：24V 1A
通过SD卡在sc200或sc1000控制器读取
服务接口 RS232
数字通讯 MODBUS或Profibus，通过sc200或sc1000控制器
显示方式 通过哈希 sc200或sc1000显示
环境温度 +5~+40℃
电源 220 VAC ±10%/50-60 Hz
功耗 约100VA
尺寸 535.80mm× 711.5mm× 376mm
重量 约38 kg (不包括试剂)
相关试剂
| 货号 | 说明 | 参数 | 分析方法 | 包装 | 量程 | 承诺保有期（天） |
|---|---|---|---|---|---|---|
| LCW420 | 化学需氧量（COD）最大（max）试剂 | - | - | - | - | 150 |
备件
| 备件货号 | 仪器型号 | 中文描述 | 英文描述 |
|---|---|---|---|
| COD05_07 | CODmax plus sc重铬酸钾法COD在线监测仪 | 活塞泵链接现 | connector cable piston pump |
| COD07_00 | CODmax plus sc重铬酸钾法COD在线监测仪 | 总线 | bus cable |
| COD08_11 | CODmax plus sc重铬酸钾法COD在线监测仪 | 侧板右侧 | SIDE PANEL RIGHT? |
| COD08_21 | CODmax plus sc重铬酸钾法COD在线监测仪 | 侧板左侧 | SIDE PANEL LEFT?? |
| COD10_11 | CODmax plus sc重铬酸钾法COD在线监测仪 | 螺丝 | SCREWING / VERSCHRAUBUNG |
| COD43_00 | CODmax plus sc重铬酸钾法COD在线监测仪 | 安全锁 | magnetic latching board |
| COD44_00 | CODmax plus sc重铬酸钾法COD在线监测仪 | 计量管处检测器（2个） | photoelement dosing unit complete |
| EHH021 | CODmax plus sc重铬酸钾法COD在线监测仪 | 活塞固定架 | syring holder |
| EXP033 | CODmax plus sc重铬酸钾法COD在线监测仪 | 活塞泵 | piston pump |
| HHA_X | CODmax plus sc重铬酸钾法COD在线监测仪 | 空气阀与消解池链接管 | Valve cuvette adapter assembly for maintenance |
| LCW420 | CODmax plus sc重铬酸钾法COD在线监测仪 | 试剂套装 | CODMAX regent |
| LZV123 | CODmax plus sc重铬酸钾法COD在线监测仪 | 电源板与主板连接排线 | SET CONNECTOR CABLE |
| LZV208 | CODmax plus sc重铬酸钾法COD在线监测仪 | 温度传感器 | Temperature sensor complete |
| OBA027 | CODmax plus sc重铬酸钾法COD在线监测仪 | 光度板 | photometer board |
| YAA857 | CODmax plus sc重铬酸钾法COD在线监测仪 | RS485板 | INTERFACE BOARD RS 485 |
| YAA903 | CODmax plus sc重铬酸钾法COD在线监测仪 | 显示卡 | LCD module card |
| YAA909 | CODmax plus sc重铬酸钾法COD在线监测仪 | 马达板 | motor board |
| YAA952 | CODmax plus sc重铬酸钾法COD在线监测仪 | 电源板 | Power supply board(ZDA269) |
| YAB112 | CODmax plus sc重铬酸钾法COD在线监测仪 | 主板 | Processor card |
| YY0000010 | CODmax plus sc重铬酸钾法COD在线监测仪 | 机箱 | HOUSING MOUNTED |
| YY0000040 | CODmax plus sc重铬酸钾法COD在线监测仪 | 安全面板 | COD51_00,safety window complete |
| YY0000050 | CODmax plus sc重铬酸钾法COD在线监测仪 | 空气阀与消解池链接管 | COD47_00,VALUE CUVETTE ADAPTOR COMPLETE |
| YY0000060 | CODmax plus sc重铬酸钾法COD在线监测仪 | 管路组件 | COD50_00,TUBE SET COMPLETE |
| YY0000070 | CODmax plus sc重铬酸钾法COD在线监测仪 | 消解池防护板 | COD48_00,SAFETY PLATE ASSY |
| YY0000080 | CODmax plus sc重铬酸钾法COD在线监测仪 | 管路和接头 | COD87_00,TUBE 10 COMPLETE |
| YY0000089 | CODmax plus sc重铬酸钾法COD在线监测仪 | 密封圈（计量管上下端密封圈） | EZD259,O-ring 6,07x1,78 Kalrez 6375 |
| YY0000090 | CODmax plus sc重铬酸钾法COD在线监测仪 | 年维护组件 | TOS_X,one year wearing spareparts |
| YY0000091 | CODmax plus sc重铬酸钾法COD在线监测仪 | 计量管电磁阀（空气水平阀） | EXV055,valve block top |
| YY0000092 | CODmax plus sc重铬酸钾法COD在线监测仪 | 密封圈 | LZV047,O-ring 2,2 x 1,6mm material: Viton |
| YY0000093 | CODmax plus sc重铬酸钾法COD在线监测仪 | 管路连接头 | HRS196,fitting pharmed tube |
| YY0000104 | CODmax plus sc重铬酸钾法COD在线监测仪 | 密封圈（消解玻璃上端密封圈） | EZD260,O-ring 9.19 x 2.62mm Kalrez 6375 |
| YY0000110 | CODmax plus sc重铬酸钾法COD在线监测仪 | O型圈套件 | EZD_X,O-ring kit for maintenance |
| YY0000113 | CODmax plus sc重铬酸钾法COD在线监测仪 | 计量管 | HBK061,Dose cuvette |
| YY0000119 | CODmax plus sc重铬酸钾法COD在线监测仪 | 消解单元下端固定模块 | COD10_01,cuvette holder bottom |
| YY0000120 | CODmax plus sc重铬酸钾法COD在线监测仪 | 活塞泵组件 | COD46_00,PISTON PUMP ARRANGED |
| YY0000122 | CODmax plus sc重铬酸钾法COD在线监测仪 | 消解池 | BBK036,cuvette |
| YY0000128 | CODmax plus sc重铬酸钾法COD在线监测仪 | 风扇组件 | COD10_36, fan holder |
| YY0000139 | CODmax plus sc重铬酸钾法COD在线监测仪 | 进样管 | ELS027,raw material, FEP 1,6x3,2 mm |
| YY0000140 | CODmax plus sc重铬酸钾法COD在线监测仪 | 消解单元上端固定模块 | COD10_02,cuvette holder top |
| YY0000141 | CODmax plus sc重铬酸钾法COD在线监测仪 | 进样/排液软管 | ELS895,raw material, pharmed 65 2,4x5,6 mm |
| YY0000156 | CODmax plus sc重铬酸钾法COD在线监测仪 | 组合阀 | EXV054,valve block bottom |
| YY0000195 | CODmax plus sc重铬酸钾法COD在线监测仪 | 安全盖 | SAFETY COVER |
| YY0000219 | CODmax plus sc重铬酸钾法COD在线监测仪 | 空气阀（消解空气阀) | EXV056,air valve ( with connector cable ) |
| YY0000287 | CODmax plus sc重铬酸钾法COD在线监测仪 | 上连接管 | ERA005,ADAPTOR END TOP |
| YY0000289 | CODmax plus sc重铬酸钾法COD在线监测仪 | 消解空气安全阀膜片 | EVQ241,membrane FFKM |
| YY0000290 | CODmax plus sc重铬酸钾法COD在线监测仪 | 标液阀 | EXV065,magn.valve type 6116,FFKM-membrane |
订购指南
9302600 CODmax plus sc 化学需氧量在线自动监测仪
LCW420 分析仪试剂
注意：上述 CODmax plus sc 货号中不包含 sc 控制器。请 根据需要订购相应的 sc200 或 sc1000 控制器。
来源:哈希水质网站公开信息
Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · HACH-ONLINE Application Case
Project Background
Municipal Wastewater Treatment customers at the Wastewater Treatment Plant stage have long faced the challenge of insufficient accuracy in effluent quality monitoring and instruments prone to contamination causing data drift, affecting compliance discharge, placing higher demands on the stability and measurement accuracy of HACH-ONLINE.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable HACH-ONLINE for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Municipal Wastewater Treatment conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Food & Beverage — Food Production Line · HACH-ONLINE Application Case
Project Background
Food & Beverage customers at the Food Production Line stage have long faced the challenge of high hygienic measurement requirements, with inline instruments needing to withstand CIP/SIP cleaning while maintaining stable accuracy, placing higher demands on the stability and measurement accuracy of HACH-ONLINE.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable HACH-ONLINE for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Food & Beverage conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Chemical & Pharmaceutical — Reactors and Storage Tanks · HACH-ONLINE Application Case
Project Background
Chemical & Pharmaceutical customers at the Reactors and Storage Tanks stage have long faced the challenge of highly corrosive media and complex conditions, requiring corrosion-resistant and explosion-proof instruments, placing higher demands on the stability and measurement accuracy of HACH-ONLINE.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable HACH-ONLINE for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Chemical & Pharmaceutical conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Power & Energy — Power Plant Boiler and Turbine · HACH-ONLINE Application Case
Project Background
Power & Energy customers at the Power Plant Boiler and Turbine stage have long faced the challenge of unstable measurement under high temperature and pressure, with high maintenance and downtime costs, placing higher demands on the stability and measurement accuracy of HACH-ONLINE.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable HACH-ONLINE for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Power & Energy conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
