Overview
The Mettler Toledo 405-DXK-S8/120 is a rugged combination pH electrode sensor engineered for continuous in-line pH measurement across a 2–14 pH range. This electrode is part of Mettler Toledo’s durable probe line and is designed to withstand harsh industrial process environments including reactors, tanks, open basins, and transfer lines. The 120 mm length makes it suitable for direct immersion and flow-through cell installations in pharmaceutical, chemical production, and water quality monitoring applications.
Key Features
- Combination pH electrode with integral reference cell
- 120 mm length for direct immersion or flow-through mounting
- Operates across 2–14 pH measurement range
- Pressure resistant up to 2.5 bar overpressure
- Designed for harsh chemical process conditions
- Compatible with Mettler Toledo transmitters and analyzers
Technical Specifications
The following specifications define the 405-DXK-S8/120 electrode performance:
| Measurement Range | 2–14 pH |
| Electrode Length | 120 mm (4.70 in.) |
| Electrode Type | Combination pH electrode with reference |
| Pressure Resistance | 2.5 bar overpressure |
| Manufacturer | Mettler-Toledo |
| Part Number | 405-DXK-S8/120 |
| Material Construction | Glass pH sensing element with reference chamber |
| Connection Type | Standard Ingold connector |
Typical Applications
- Pharmaceutical manufacturing and bioreactor monitoring
- Chemical production and process quality control
- Pure and ultrapure water monitoring
- Wastewater treatment and environmental monitoring
- Food and beverage processing
- Hygienic and sanitary process measurement
Compatibility & Replacements
Compatible With
- Mettler Toledo HA405-DXK process pH analyzer systems
- Mettler Toledo M300 and M400 pH transmitters
- Mettler Toledo InFlo process housings
- Standard Ingold electrode connectors
- Industrial pH control and monitoring systems
Replaces / Drop-In Replacement For
- HA405-DXK-S8/120 (original Mettler Toledo designation)
Works With
- Mettler Toledo process analytics software and SCADA systems
- Analog 4–20 mA transmitter outputs
- Industrial pH measurement and control systems
- Lab and bench-top pH analyzers with standard Ingold connectors
