Industrial Digital PH Controller

Online residual chlorine/pH Controller LH-CL650,suitable for industrial,laboratory,or other water testing.
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Product Details

High Quality online residual chlorine/pH Controller LH-CL650

Industrial Digital PH Controller


Industrial Digital PH Controller


1. The large LCD display, English menu operation.
2.Multi-parameter display at the same time: the value of residual chlorine,pH,temperature, output current, alarm points, etc. Intuitive and easy to read, and alarm for range over run.
3.Screen displays alarm status and accompanied by a switch ON / OFF signal output
4.Automatic Temperature Compensation: Automatic 0℃ to 60℃
5.Communication function (optional): RS-485 communication interface(MODBUS protocol is partially compatible), 4 to 20 mA current output corresponding to the DO value can be set freely.
6.Notepad: can store 50 measurements, the user can record measurement data.
7.Hysteresis amount can be set freely to avoid frequent switching relay action
8.Watchdog function: to ensure that the instrument will not crash
9.Core devices from famous foreign brands
10.Restore the factory settings. Power-down protection> 10 years

 Industrial Digital PH Controller

Industrial Digital PH Controller

Technical parameters:

Product Name:

Industry online residual chlorine/pH controller

Measure range & Accuracy

0-14 (pH)    ±0.02pH

Hypochloric acid:0-20ppm    ±0.01mg/L

Residual chlorine:0-10ppm    ±0.01mg/L


0.01pH, 0.01mg/L(residual chlorine),0.001mg/L(HOCL)

Input Resistance:

≥1x10 ¹²Ω

Temp Compensation:

Manual / Auto temperature compensation


RS485, standard Modbus

Signal output:

4-20mA output, Maximum loop 750Ω, 0.01%FS

Power supply:

220V AC 10%,50/60Hzz



Hole size




Industrial Digital PH Controller


Industrial waste water,

pure water, circulating water,

food wastewater treatment, desulfurization pickling,

waste water treatment, glass carving process,

electroplating wastewater, printing and dyeing,

electronic semiconductor, chemical, pharmaceutical, etc


Industrial Digital PH Controller

Packaging & Shipping

The normal package is carton box,it also can be packaged according to customers special request.

Company Information

 Hangzhou Lohand Biological Co.,Ltd is a professional company that manufactures and exports laboratory instruments and equipments.We have our own registered brand"LOHAND" and own factory,with strong R&D center,sales team,customer service team and QC team,which grows very fast and obtains good reputation in the markt.


Our major products include: Refractometer,Test paper,pH meter,Electrode,TDS meter,Salinity meter, DO meter,ORP meter,Conductivity meter,Turbidity meter,Color comparison tube,test kit etc.Most of the products have CE certificate.All products can be customized according to buyers' special requirements.

Industrial Digital PH Controller


Q1: Why choose us?
A: 1. We have our own factory with strong R&D center and QA team which can make sure your goods can be sent out on time and in superior quality. 
2. We have experienced and dedicated core members to offer you professional and reliable before-sales and after-sales service.
3. We have purveyed customers with the lowest wholesale price.

Q2: How do you guarantee the quality?
A: One year's guarantee from date on B/L. Normally. If it's quality problem, we promise to return goods or funds.

Q3: Is OEM available?
A: Yes, all goods can be custom made by your requirements, including packing, LOGO print, etc.

Q4: Can we buy 1 pc for sample testing?
A: Yes, we are glad to send 1pc for quality testing if we have stock of the model you required.

Q5: How to deliver the goods for trial order or small order?
A : For small order, we prefer to choose international express, such as DHL, TNT, EMS which are faster and more convenient for customer. Also, we cooperate with an express agent that can give us a big discount for express fee which is much lower than that quoted by official. For the goods with detachable battery, the express fee can be lower down if the goods is sent out without battery.

Q6: What kind of payment your company accept?

Q7: If we have not found the model from website, what should we do?
A: Please email us with description and picture of the product, we research and develop new model every month, and some of them maybe have not been uploaded in website immediately. But If this is a new products for us, we can develop it for you after get all detailed information about your product.

Industrial Digital PH Controller

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