871PH Series pH and ORP Sensors and Accessories
The Model 871PH Sensor includes a robust and continuously reusable sensor body with a field replaceable measuring electrode, and field replaceable reference junction and electrolyte. Numerous options and accessories are offered to enhance the performance of these transmitters.
ENHANCED MODEL 871PH DESIGN
Many new measuring electrodes, reference junctions, options, and accessories have been added to the 871PH sensor family. These include:
• High temperature electrode featuring unique DolpHin™ Series high temperature glass.
• Patented double junction reference with integral Nafion ion barrier.
• Variopin Quick cable connector.
• Optional selections for high temperature cable and O-ring material.
• A ptfe collar, which improves self-cleaning, and also minimizes coating buildup.
SINGLE MULTI-PURPOSE ASSEMBLY
This multi-purpose sensor assembly is suitable for most process pH and ORP measurement applications. Its flexibility is further enhanced when used with a variety of mounting accessories. The sensor accepts a variety of glass pH, metallic pH, and ORP electrodes. The unit is not affected by normally encountered chemical solutions and is capable of withstanding continuous operation in a wide range of process pressures and temperatures.
SENSOR DIAGNOSTICS
When used with the 870ITPH Intelligent Transmitter or 875PH Intelligent Analyzer, the intelligent configurations of the sensor (Sensor Model Code Selections -3, -4, -5, and -6) provide diagnostic information. Sensor health checks will reveal the following faults:
• Broken glass electrode
• Aging glass electrode
• Liquid leakage into sensor body
• Failure of high impedance amplifier in sensor (Sensor Selection Codes -3 and -4 only)
• Failure of temperature compensation element
• Excessive coating of the reference electrode, or sensor not in contact with process water.
features
- • Unique pH glass – exceptionally stable, remains fast and accurate after severe temperature cycling (121°C/250°F).
- • Proven high stability, high accuracy, and long life.
- • Easy-to-use body design simplifies installation, calibration, maintenance, and replacement.
- • More reliable measurements permit tighter process control.
- • Longer life plus easy mounting reduces maintenance costs.