1. Sensor Overview:

️· Type: Liquid-filled pH/ORP (Redox) sensors.
️· Purpose: Primarily for measuring pH and ORP in various industrial applications (water, wastewater, chemical, food, biotechnology, pharmaceuticals).
️· Technology: Uses a liquid electrolyte system (KCl) for stability and accuracy. Employs Memosens technology (for some models) for digital communication and data integrity.

2. Key Features and Technical Specifications:

️· Pressure Resistance: Rated up to 16 bar (232 psi), with TÜV certification confirming this.
️· Temperature Range: Electrolyte solutions can handle temperatures from -30°C to 130°C (-22°C to 266°F) depending on solution.
️· Certifications & Approvals:
- ATEX & IECEx for hazardous area applications (Ex ia IIC T3/T4/T6 Ga).
- FM & CSA for IS Class I Div. 2 installations.
- TÜV for pressure resistance.
- EMC compliance (EN 61326).
️· Plug-in Head Options: A variety of plug-in heads are available:
- GSA: For electrodes without temperature sensors.
- SSA: Hose connection head for electrodes without temperature sensors.
- ESS: Hose connection head with TOP68 coupling.
- ESA: Threaded plug-in head, TOP68, for electrodes with and without temperature sensors
- CPK1: For electrodes with GSA plug-in head.
- CPK9: Terminated measuring cable for analog sensors.
- TOP68: Common plug-in head.
️· Reference System: Ag/AgCl reference lead with liquid KCl electrolyte (3M).
️· Hazardous Area Identification: Digital sensors in hazardous areas are marked with an orange ring on the plug-in head.

3. Ordering and Configuration:

️· Product Pages:
- [www.endress.com/cps41d](http://www.endress.com/cps41d) (for CPS41D)
- [www.endress.com/cps41](http://www.endress.com/cps41) (for CPS41)
️· Product Configurator: Used to select options and generate a complete order code.
️· Delivery Includes: Sensor and brief operating instructions.

4. Accessories (Selection):

️· Assemblies: Various "Fit" assemblies for different applications (Cleanfit, Unifit, Dipfit, Flowfit, Ecofit). These are retractable or immersion assemblies.
️· Electrolyte Vessel: (CPY7) 150 ml container for KCl electrolyte.
️· KCl Electrolyte Solutions: Different concentrations (1.5 mol, 3.0 mol).
️· Buffer Solutions: High-quality pH buffer solutions (CPY20).
️· Memosens Cables: CYK10 and CYK20 for Memosens sensors.

Important Notes:

️· The document encourages users to visit the product pages and use the configurator for accurate ordering.
️· Endress+Hauser offers a wide range of accessories to support these sensors, depending on the specific application.