Metrohm 780 pH Meter & 781 pH/Ion Meter

Introduction

The Metrohm 780 pH Meter & 781 pH/Ion Meter deliver precise pH, mV, temperature, and ion concentration measurements for demanding laboratory applications. Designed with advanced calibration, intelligent quality control, and GLP-compliant documentation, these benchtop instruments provide reliable analytical performance and streamlined workflows. The 781 model further expands analytical capabilities with ion-selective electrode support, making it an ideal solution for research, environmental, pharmaceutical, and industrial laboratories.

Advanced Laboratory Instruments for Precision pH and Ion Analysis

The Metrohm 780 pH Meter and 781 pH/Ion Meter are premium laboratory instruments engineered for highly accurate pH, potential, temperature, and ion concentration measurements. Combining Metrohm’s renowned precision with advanced quality control features and intuitive operation, these benchtop meters are ideal for laboratories requiring reliable analytical performance and GLP-compliant documentation.

The 781 pH/Ion Meter extends functionality beyond pH analysis by providing precise ion concentration measurements using ion-selective electrodes, making it a versatile solution for research, environmental, industrial, and quality control laboratories.

Key Features

• High-resolution graphical LCD display
• Accurate pH, mV, and temperature measurement
• Ion concentration measurement (781 model)
• GLP-compliant electrode testing
• Automatic buffer recognition with up to 9 calibration points
• Automatic temperature compensation
• Built-in method and data storage
• Automatic calibration monitoring and service reminders
• User identification for traceable documentation
• RS232 connectivity for PC and printer
• Barcode reader and keyboard compatibility
• Metrohm stirrer control via MSB interface

Precision Measurement Made Simple

Designed for both routine and advanced laboratory applications, the Metrohm 780 and 781 deliver accurate measurements with an intuitive user interface. The large graphical display presents measurement values, calibration curves, and operating parameters clearly, while customizable methods simplify repetitive workflows.

Integrated temperature measurement and automatic compensation ensure consistent and reliable results across different sample conditions.

Intelligent Quality Control

Metrohm’s advanced quality assurance features help laboratories maintain measurement accuracy and regulatory compliance.

• GLP-compliant electrode performance testing
• Automatic electrode condition evaluation
• Calibration curve storage
• Automatic buffer recognition
• Instrument self-diagnostics
• Adjustable calibration and service intervals
• Complete measurement traceability through user identification

These functions minimize operator error while supporting laboratory quality management systems.

Advanced Ion Analysis (781 pH/Ion Meter)

The 781 pH/Ion Meter provides comprehensive ion concentration determination using ion-selective electrodes.

Supported measurement methods include:

• Direct ion measurement
• Calibration curve analysis
• Standard addition
• Sample addition
• Fully automated dosing with Metrohm Dosimat

The instrument supports a wide range of ion-selective electrodes for applications involving fluoride, chloride, sodium, potassium, calcium, nitrate, silver, copper, lead, cyanide, bromide, iodide, sulfide, cadmium, thiocyanate, and many other ions.

Laboratory Automation

The 780 and 781 meters integrate seamlessly with Metrohm laboratory accessories for improved productivity.

Compatible accessories include:

• 801 Magnetic Stirrer
• 802 Rod Stirrer
• 804 Ti Stand
• Metrohm Dosimat
• Compact Autosampler
• External Printer
• Barcode Reader
• PC Keyboard

These accessories enable automated calibration, sample addition, and high-throughput analytical workflows.

Applications

The Metrohm 780 and 781 are ideal for:

• Environmental Laboratories
• Water & Wastewater Testing
• Food & Beverage Quality Control
• Pharmaceutical Analysis
• Chemical Manufacturing
• Mining & Metallurgy
• Academic & Research Laboratories
• Industrial Quality Assurance
• Ion-Selective Electrode Analysis

Why Choose Metrohm 780 & 781?

The Metrohm 780 pH Meter & 781 pH/Ion Meter combine precision, flexibility, and intelligent quality control to meet the needs of modern laboratories. Automatic buffer recognition with up to nine calibration points, temperature compensation, and electrode performance evaluation help users achieve consistent and repeatable results. The high-resolution graphical display presents measurement data and calibration information clearly, simplifying routine analysis. The 781 model extends functionality by supporting ion-selective electrodes for accurate determination of numerous ions through direct measurement, calibration curves, standard addition, and automated dosing. Built-in method storage, user identification, calibration monitoring, and RS232 connectivity strengthen traceability and data management. Compatibility with Metrohm stirrers, Dosimat systems, autosamplers, and other accessories enables laboratories to automate workflows and increase productivity while maintaining exceptional analytical accuracy.