Endress+Hauser CPS11D-7BA2G pH/ORP Sensor | Replacement, Equivalent & Selection Guide
The Endress+Hauser CPS11D-7BA2G is a digital Memosens pH/ORP combination sensor designed for demanding process and water/wastewater applications. It features inductive, non-contact signal transmission that eliminates moisture-related measurement errors and enables hot-plug capability for safe, tool-free replacement. At Konmask.com, we supply genuine and compatible alternatives for this sensor to support your process continuity.
Technical Specifications
- Manufacturer: Endress+Hauser
- Model / Part Number: CPS11D-7BA2G
- Series: Memosens CPS11D
- Measurement Type: pH and ORP (Redox)
- Signal Transmission: Memosens digital (inductive, non-contact)
- pH Measuring Range: 0 … 14 pH
- ORP Measuring Range: –1500 … +1500 mV
- Process Temperature: 0 … 80 °C (32 … 176 °F)
- Process Pressure: 0 … 6 bar (0 … 87 psi)
- Reference System: Double junction, KCl gel electrolyte
- Shaft Material: PEEK / Glass
- Process Connection: PG 13.5 / Varivent / Tri-Clamp compatible
- Ingress Protection: IP68
- Approvals: CE, ATEX (zone-dependent variant)
- Communication: Memosens protocol (compatible with Liquiline, Mycom, Liquistation transmitters)
Compatible Replacement & Equivalent Models
The following sensors are functionally compatible or serve as direct/near-direct replacements for the CPS11D-7BA2G. Always verify process conditions and connector type before substitution.
- Endress+Hauser CPS11D-7BA21 – Same series, standard process connection variant
- Endress+Hauser CPS11D-7BA4G – Extended temperature range variant
- Endress+Hauser CPS71D – Hygienic Memosens pH sensor for food & pharma
- Endress+Hauser CPS41D – Retractable Memosens pH sensor for inline use
- Mettler-Toledo InPro 3100 – Analog pH sensor, requires signal converter
- Hamilton Duracal pH – Compatible with Memosens protocol adapters
- Knick SE 555 – Digital pH sensor, Memosens-compatible via adapter
Note: Third-party replacements may require firmware or transmitter configuration adjustments. Contact [email protected] for compatibility verification.
Why Choose the Original Model
- Memosens Digital Technology: Stores calibration data on-chip — calibrate in the lab, install in the field with zero signal loss.
- Moisture-Proof Connection: Inductive coupling eliminates the #1 cause of analog sensor failure.
- Predictive Diagnostics: Sensor health, glass impedance, and reference resistance are continuously monitored and reported to the transmitter.
- Long Service Life: Double-junction reference with gel electrolyte resists poisoning in complex process media.
- Plug-and-Play Replacement: Hot-swap capability reduces process downtime during maintenance.
Typical Applications
- Municipal and industrial wastewater treatment (pH neutralization, effluent monitoring)
- Drinking water quality monitoring
- Chemical dosing control loops
- Cooling tower and boiler water chemistry
- Swimming pool and aquaculture water management
- Pulp & paper process water
- General industrial process pH/ORP measurement
System Compatibility
The CPS11D-7BA2G is fully compatible with the following Endress+Hauser transmitter platforms via Memosens protocol:
- Liquiline CM442 / CM444 / CM448 – Multi-parameter field transmitter
- Liquiline M CM42 – Compact single-channel transmitter
- Mycom CPM153 / CPM253 – Dedicated pH/ORP transmitter
- Liquistation CSF48 – Automatic water sampler with integrated analysis
- Memograph M RSG45 – Advanced data manager
Third-party Memosens-compatible transmitters from Knick, Hamilton, and Bürkert may also be used with appropriate configuration.
Selection Guide
Use the table below to select the correct CPS11D variant for your application:
- Standard water/wastewater, 0–80 °C, PG 13.5: → CPS11D-7BA2G (this model)
- High-temperature process up to 130 °C: → CPS11D-7BA4G or CPS71D
- Hygienic / CIP-SIP applications: → CPS71D (Tri-Clamp, FDA-compliant)
- Retractable / inline without process shutdown: → CPS41D with Cleanfit retractable assembly
- Analog transmitter (legacy system): → CPS11 (non-D analog version) + CPM253 transmitter
- ATEX Zone 1 hazardous area: → Specify ATEX variant during order; confirm with E+H sales
Key ordering parameters: Process connection type · Temperature/pressure class · Shaft length · Approval requirements (ATEX/SIL) · Electrolyte type
Quality Assurance & Sourcing
- All units sourced through authorized distribution channels or verified surplus stock
- Each sensor inspected for physical integrity and original packaging before dispatch
- Calibration certificates and factory documentation available upon request
- Genuine Endress+Hauser parts carry full OEM warranty; surplus/refurbished units carry Konmask 90-day functional warranty
- Export compliance checked for all international orders (HS Code: 9027.80)
How to Order
- Confirm your transmitter model and Memosens cable type (CYK10 / CYK71)
- Verify process connection: PG 13.5, Varivent N, or Tri-Clamp
- Check shaft length requirement (standard: 120 mm or 225 mm)
- Add to cart or contact [email protected] for bulk pricing and lead time
- Provide your PO number and shipping destination for freight quote
📞 +0086 19859288691 | ✉ [email protected]
Replacement & Compatibility FAQ
Q: Can I use CPS11D-7BA2G with a non-Endress+Hauser transmitter?
A: Yes, any Memosens-protocol transmitter (Knick, Hamilton, Bürkert) is compatible. Analog transmitters require a Memosens adapter module.
Q: What is the difference between CPS11 and CPS11D?
A: CPS11 is the analog predecessor; CPS11D uses Memosens digital protocol with on-sensor data storage and predictive diagnostics.
Q: How often should the CPS11D-7BA2G be calibrated?
A: Typically every 4–8 weeks depending on process media aggressiveness. Memosens allows lab calibration before installation, reducing process downtime.
Q: Is this sensor suitable for ATEX Zone 2 environments?
A: The standard 7BA2G variant is not ATEX-rated. Specify an ATEX-approved variant (e.g., 7BA2G/Ex) for hazardous area use.
Q: What Memosens cable is required?
A: Endress+Hauser CYK10 (standard) or CYK71 (M12 connector) cables are recommended. Cable length up to 100 m is supported.
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