The Mettler Toledo M800 Process 2-CH (4-Wire) is a two-channel, multi-parameter analytical transmitter for monitoring compatible in-line process sensors from a centralized interface.
It supports simultaneous measurement across two channels and presents measurement values, sensor information, and operating menus on a 5.7-inch color touchscreen.
Designed for use with digital ISM sensors, the transmitter accommodates pH/ORP, conductivity, dissolved oxygen, gas-phase oxygen, optical dissolved oxygen, and dissolved carbon dioxide measurements.

Configurable analog outputs, relay functions, PID controllers, and USB connectivity support integration with industrial process monitoring and control systems.
Key Characteristics
- Two measurement channels for simultaneous monitoring of compatible in-line process sensors
- Multi-parameter support for pH/ORP, conductivity, dissolved oxygen, gas-phase oxygen, optical DO, and dissolved CO2
- Compatibility with digital sensors featuring Intelligent Sensor Management (ISM) technology
- 5.7-inch color touchscreen with an organized menu structure and configurable measurement display
- 4-wire operation with a 100 V to 240 VAC or 20 to 30 VDC power supply
- Configurable analog outputs, relay contacts, PID control functions, and USB communication interface
Ideal Applications
- Dual-point process measurement requiring two sensor channels within one transmitter
- Combined pH/ORP, conductivity, oxygen, or dissolved CO2 monitoring
- Chemical processing and other industrial process measurement systems
- Food and beverage process monitoring
- Wastewater and other water-related process applications
- Installations requiring local touchscreen operation with output and control-system integration
Parameters
- Conductivity
- Dissolved CO2
- Dissolved Oxygen
- Gas-Phase Oxygen
- ORP
- Optical DO
- pH
Communication
- None
Product Family Includes
- M800 Process 1-CH (4-Wire)
- M800 Process 2-CH (4-Wire)
- M800 Process 4-CH (4-Wire)
Industries Served
- Chemical Processes
- Other Industrial Processes
- Other Water Processes
- Wastewater







