ABB 2867 series pH and Redox (ORP) industrial dip electrode systems
ABB 2867 series pH and Redox (ORP) industrial dip electrode systems
Introduction
2867 series industrial dip electrode systems are designed for pH and Redox measurement in channels and open tanks. They are particularly suitable for use in effluent treatment applications where automatic temperature compensation is not required. The 2867 series incorporate a specially designed
combination electrode, providing reliable measurement in a wide variety of samples.
The systems are constructed from plastic throughout; the dip stem, of nominal 0.46, 0.92 or 1.83 m (18, 36 or 72 in.) length,is manufactured from ABS that is chemically resistant to most samples and withstands temperatures of up to 70 °C (158 °C).The stem is filled with salt-bridge solution, forming an integral reservoir for the reference element mounted in the upper end of the electrode assembly. A liquid junction with the sample is made at a ceramic plug fitted in the wall of the stem at its lower end; two sizes of plug are provided, giving the option of a higher flow of salt-bridge solution in samples that could block the ceramic or contaminate the reference element.
ABB 2867 series pH and Redox (ORP) industrial dip electrode systems
Electrodes available for the system
Glass combination pH electrode:
• 1912-400 (BNC plug termination)
• 1912-500 (tag terminations)
Antimony combination pH electrode:
(for samples containing hydrofluoric acid)
• 1990-400 (BNC plug termination)
• 1990-500 (tags)
Platinum combination Redox electrode:
• 19800-400 (BNC plug termination)
• 1980-500 (tags)
ABB 2867 series pH and Redox (ORP) industrial dip electrode systems
Each electrode assembly screws into the lower end of the system and is sealed by means of an O-ring to prevent saltbridge solution loss. The fitted cable of 6 m (19.5 ft.)length passes out of the top of the system through a split rubber bung. The cable terminates in either a BNC plug (–400 electrodes) for connection to an extension cable, or tags (–500 electrodes) for direct connection to 4500, 4600 and AX400 series transmitters.
Mounting of the systems is achieved by using either the supplied flange or wall-mount bracket, with immersion depth adjustable by means of O-rings.
ABB 2867 series pH and Redox (ORP) industrial dip electrode systems
ABB 2867 series pH and Redox (ORP) industrial dip electrode systems
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