E+H pure water pH electrode, old: CPS11D-7AS21, new: CPS11E-AA7AAS2

**Product Overview** **Orbisint CPS11 and CPS11D** **Analog and digital Memosens technology pH electrodes for typical process and environmental technologies, with antifouling PTFE diaphragms and optional built-in temperature sensors** **Measurement System** **A complete measurement system includes a CPS11 pH electrode or a CPS11D digital pH electrode** **Transmitters, such as the Liquisys M CPM223/253 [Memosens technology CPS11D]** **Specialized measurement cables, such as the CPK9 or Memosens data cable CYK10** **Intrusive, flow-through, or retractable process supports, such as Cleanfit** CPA472

Installation Conditions

Installation Guide

Do not invert the electrode during installation. The tilt angle should be at least 15° to the horizontal, as a more horizontal tilt angle will create an air bubble layer in the glass hemisphere. This will reduce the humidity of the internal electrode pH membrane.

Caution!

Before installing the electrode, ensure that the threaded connections of the electrode components are clean and secure.

Manually tighten the electrode (3 Nm)! (This value is only applicable to the installation of the Endress+Hauser component)

Please follow the installation instructions in the user manual to install the components.

The minimum installation angle of the electrode must be 15° to the horizontal.

Product Features

Advantages

• Uses a large-area PTFE annular diaphragm to ensure electrode durability

• Suitable for biochemical reaction measurements

• Usable at 6 bar pressure

• Long service life

• Steam sterilizable

• Usable in highly alkaline process glass

• Optional built-in Pt100 or T1000 temperature sensor for accurate temperature compensation

• TOP68 connector ensures reliable transmission of measured values

Further advantages based on Memosens technology

• Maximum process safety through non-contact inductive transmission

• Secure Digital Data Transmission

• Special Sensor Data Storage Function for Easy Operation

• Sensor Storage of Characteristic Parameters for Pre-Maintenance of Instruments

Technical Parameters Specifications

Input

Measured Variables

pH Value Temperature

Measurement Range

Electrode Type	Applicable Scope	Measurement Range
AA Type Electrode	Water/Wastewater Measurement	0...12 pH, -15...80℃
BA Type Electrode	Process Application, Steam Sterilization	0...14 pH, 0...135℃
FA Type Electrode	Hydrofluoride at 1g/L Concentration	0...10 pH, 0...70℃
AS Type Electrode	Pure Water Measurement	1...12 pH, -15...80℃, 6bar, with Salt Ring
BT Type Electrode	Measurement in Complex and Harsh Media	0...14pH, 0...135℃, 16bar, with ion trap, highly resistant to poisoning

Please note the process operating conditions!

Environmental Conditions

Ambient Temperature	Caution: Frost can damage the electrodes. Do not use the electrodes below -15°C.
Storage Temperature	0...50°C
Protection Rating	IP 67: GSA connector with enclosed joint IP 68: TOP68 connector, temperature resistant up to 135°C (1m/3.28ft water column, 50°C, 168h) IP 68: Memosens connector (10m/32.81ft water column, 25°C, 45 days, 1mK l)

Process Conditions

Process Temperature	AA type -15...80℃ BA type 0...135℃ FA type 0...70℃ AS type 0...60℃ BT type 0...135℃
Process Pressure	0...6bar
Pressure-Temperature-Load Chart
Conductivity	Minimum 50 μS/cm (except AS type)
pH range	AA type 0...12pH BA type 0...14pH FA type 0...10pH AS type 1...12pH BT type 0...14pH
Temperature sensor	CPS11: Pt100 Pt1000 CPS11D: NTC
CPS11 Connector	CPS11： ESA： Threaded connector Pg13.5, TOP68 for electrodes with or without temperature sensors 16 bar triple overvoltage safety, explosion-proof GSA： Threaded connector Pg13.5 for electrodes without temperature sensors CPS11D：Memosens connector for digital, non-contact data transmission
Reference System	Ag/AgCl metal lead with 3mol KCl modified gel, AgCl-free

Note: The electrode glass membrane must always be kept moist and must not be exposed to air or water.

Selection Guide

CPS11 Product Selection Table

CPS11D Product Selection Table

Product Dimensions

Mechanical Structure

CPS11 Design and Dimensions

CPS11 with GSA connector

CPS11 with ESA connector, built-in temperature sensor

CPS11D Design and Dimensions

CPS11D with Memo sens connector, built-in temperature sensor

Product Applications

Applications

• Process Technology and Monitoring

• Papermaking

• Petrochemicals

• Power plants (e.g., desulfurization units)

• Smelting

• Food industry

• Brewing plants

• Water treatment

• Drinking water

• Cooling water

• Influent water

Technical Specifications

Weight
Material	Electrode Main Rod pH Diaphragm Glass Metal Leads Diaphragm Process Glass Types A, B, and F Ag/AgCl Annular Teflon Diaphragm, Steam Sterilized
Process Connection	Pg13.5

Specification	Value
Brand	Endeshaus E+H
Category	PH Sensor
Wire Length (m)	None
Accuracy	±0.01

Plain language sourcing guide for E+H pure water pH electrode, old: CPS11D-7AS21, new: CPS11E-AA7AAS2

Start with the full model name. Check the brand name. Check the part number. Check the code on the old unit. These small checks help you avoid a wrong order.

Take one clear photo of the front label. Take one photo of the side label. If the part has a cable, plug, port, seal, coil, or screen, take a photo of that area too.

Tell us the quantity you need. Tell us your country. Tell us the date when the plant needs the part. We can then check stock, lead time, safe packing, and the best shipping plan.

If the exact model is no longer made, do not guess. Send the old model and the use case. LEHIY can compare close options and explain which choice is safer for repair work.

Use simple order notes. Write the model in one line. Write the quantity in one line. Write the delivery country in one line. This helps our team reply faster.

Check the old part before removal. Look at the label. Look at the connector. Look at the mounting size. Look at the voltage or pressure rating if it is shown.

Do not rely on a short nickname for a part. Many industrial items have close versions. A small suffix can change the plug, output, range, or software setting.

Ask for a stock check if the plant is stopped. Ask for a lead time if the order is planned. Ask for packing photos if the part is fragile or heavy.

For a replacement order, tell us what failed. Tell us where the part is used. Tell us if an equal model is acceptable. This makes the first answer more useful.

For repeat orders, send the last invoice, old label, or old packing photo. The same reference can help us match the correct product again.

For urgent service, keep the message simple. One model, one quantity, one photo, and one delivery target are enough for a fast first check.