Endress+Hauser CYK10-A201 Replacement for Memosens Series

Product Overview

Endress+Hauser CYK10-A201 Replacement for Memosens Series: Seamless Transition & Legacy System Compatibility

The Endress+Hauser CYK10-A201 is a Memosens digital field transmitter designed for conductivity measurement in demanding process environments. As legacy CYK10-series installations age and original units reach end-of-service life, facilities engineering teams face the critical challenge of sourcing a verified replacement that preserves wiring integrity, communication protocol compatibility, and process uptime. TOPNLMS stocks the CYK10-A201 as a direct drop-in replacement, enabling your team to execute a controlled migration without redesigning the measurement loop or rewriting transmitter configuration from scratch.

Whether your existing installation relies on a Liquiline CM442, CM444, or CM448 multiparameter transmitter as the host controller, or you are running a standalone Memosens loop with a Mycom CLM153 or Conducta CLM223 predecessor unit, the CYK10-A201 integrates directly into the established Memosens digital signal chain. The Memosens protocol transmits calibration data, sensor identity, and measurement values digitally over a two-wire inductive connection, eliminating the analog signal degradation that affects older 4–20 mA conductivity loops. This means your replacement unit arrives pre-verified and ready to pair with the host transmitter without manual re-ranging or loop calibration at the field junction box.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful CYK10-A201 migration rarely involves the sensor alone. In most plant modernization projects, the conductivity measurement point is one node within a broader analytical instrumentation loop. When upgrading from a legacy Mycom or Conducta platform to a current Liquiline architecture, the host transmitter itself may also require replacement. The Liquiline CM442 single-channel transmitter and the CM444 four-channel variant are the most common host upgrades paired with the CYK10-A201 in water treatment, pharmaceutical CIP, and chemical process applications.

For installations where the field junction box uses older M12 or terminal-block wiring, the Memosens CYK10 series connects via a dedicated Memosens cable assembly — typically the CYK71 or CYK81 Memosens connecting cable — which routes the inductive signal from the sensor head to the transmitter input module without requiring shielded analog cable replacement. This eliminates a significant portion of field rewiring labor during the upgrade outage window.

In multiparameter skids where conductivity is measured alongside pH, dissolved oxygen, or turbidity, the Liquiline CM448 eight-channel transmitter provides a consolidated host platform. Pairing the CYK10-A201 with a CPS11D Memosens pH sensor or an OXY1 dissolved oxygen sensor on the same CM448 host reduces panel space requirements and simplifies HART or PROFIBUS DP communication to the DCS or PLC. For facilities running a Siemens S7-300 or S7-400 PLC as the process controller, the CM448’s PROFIBUS DP module maps all analytical values into the existing process image without requiring additional signal conditioning hardware or analog input cards.

Where the existing control cabinet uses a Pepperl+Fuchs or MTL signal isolator for the legacy 4–20 mA conductivity loop, that isolator can typically be removed from the signal path once the Memosens digital loop is established, freeing a DIN rail slot for other instrumentation. In hazardous area installations classified as Zone 1 or Zone 2, the CYK10-A201 is available in Ex-rated variants, and the Liquiline CM442 Ex version provides the intrinsically safe barrier function within the transmitter housing, eliminating the need for a separate Zener barrier or galvanic isolator in the field junction box.

For procurement teams managing spare parts inventory across multiple measurement points, the CYK10-A201 is a standardized SKU that consolidates replacement stock for conductivity loops across different process lines. Stocking one or two units alongside a CYK71 Memosens cable and a CM42 compact transmitter as a backup host covers the majority of unplanned outage scenarios in a typical water or chemical plant.

Retrofit Guidance FAQ

Q: Can I install the CYK10-A201 into my existing immersion assembly without modifying the process connection?
A: Yes. The CYK10-A201 uses a standard G 1½ or NPT 1½ process connection compatible with most Endress+Hauser and third-party immersion assemblies. Verify the insertion length and retraction fitting type (e.g., CPA250 or CPA450 retractable assembly) before ordering if your installation uses a pressurized retraction system.

Q: Do I need to recalibrate after replacing the sensor?
A: The Memosens chip inside the CYK10-A201 stores factory calibration data. When connected to a Liquiline host transmitter, the host reads the stored calibration automatically. A process verification check against a reference standard is recommended after installation, but a full manual calibration from scratch is not required for most applications.

Q: My existing host is a Mycom CLM153 — is the CYK10-A201 compatible?
A: The CLM153 uses an analog input and does not support the Memosens digital protocol natively. To use the CYK10-A201 with a CLM153 host, you would need to upgrade the host transmitter to a Memosens-compatible unit such as the Liquiline CM442 or CM42. TOPNLMS can supply both the sensor and the host transmitter as a paired upgrade kit.

Q: What communication protocols does the CYK10-A201 support for DCS integration?
A: The CYK10-A201 communicates via the Memosens digital protocol to the host transmitter. The host transmitter (e.g., CM442 or CM448) then provides the DCS interface — options include 4–20 mA + HART, PROFIBUS DP, FOUNDATION Fieldbus, or Modbus RS485 depending on the host module configuration. No changes to the DCS I/O card are required if the existing host transmitter is retained.

Q: How much panel space does the replacement require?
A: The CYK10-A201 sensor head dimensions are unchanged from earlier CYK10 variants. The Memosens cable connector adds no additional panel penetration. If upgrading the host transmitter simultaneously, the Liquiline CM442 fits a standard DIN rail or panel cutout of 96 × 96 mm, compatible with most existing transmitter cutouts.

Q: What is the lead time and shipping arrangement?
A: TOPNLMS ships from Xiamen, China. In-stock units are dispatched within 1–2 business days via DHL Express or FedEx International Priority. Estimated transit time to most destinations in Southeast Asia, the Middle East, and Europe is 3–7 business days. Emergency same-day dispatch is available for confirmed in-stock orders placed before 14:00 CST.

Warranty Assurance

Every CYK10-A201 unit supplied by TOPNLMS is covered by a 12-Month Warranty from the date of shipment. Prior to dispatch, each unit undergoes a pre-shipment functional inspection that verifies Memosens chip communication, connector integrity, and physical condition. Units that do not pass inspection are quarantined and not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund at the buyer’s election. Return shipping for confirmed defective units is covered by TOPNLMS for orders within the warranty period. Our after-sales response target is 24 hours for initial acknowledgment and 72 hours for resolution proposal on all warranty cases.

For procurement teams requiring documentation, TOPNLMS can provide a test report, packing list, and commercial invoice with HS code declaration for customs clearance. Certificate of Origin (CO) is available on request for preferential duty applications.

Bulk orders of 3 or more units qualify for priority allocation from reserved stock, ensuring your maintenance team has verified spares on hand before the next planned shutdown window.