Rosemount 499ACL-02-54-VP Total Chlorine Sensor

Description

Rosemount 499ACL-02-54-VP Total Chlorine Sensor

Product Overview

The Rosemount™ 499ACL-02-54-VP is a membrane-covered amperometric sensor designed for the continuous measurement of Total Chlorine (including free chlorine, hypochlorite, combined chlorine, and chloramines).

Used in conjunction with the Rosemount TCL Sample Conditioning System and Compatible Liquid Analyzers (such as Rosemount 1056, 56, or 5081), this sensor converts total chlorine into iodine via chemical reaction and precisely measures it at the sensor’s gold cathode.

Part Number Breakdown & Technical Specifications

Catalog Number Decoding: 499ACL-02-54-VP

• 499ACL: Rosemount Amperometric Chlorine Sensor Series
• -02: Sensor Type — Total Chlorine Sensor (Gold Cathode)
• -54: Standard Construction / Elastomer Configuration
• -VP: Connector Type — Variopol (VP 6.0) Watertight Quick-Disconnect Connector

Key Specifications

Key Advantages

• Quick-Disconnect VP Connector: The Variopol (VP 6.0) connector allows simple sensor replacement without needing to replace or re-route interconnecting field cables.
• No Manual Tool Maintenance: Features an easily replaceable membrane assembly requiring no specialized tools during routine electrolyte refilling.
• Automatic Pressure Compensation: Incorporates an internal silicone bladder for automatic pressure equalization, maintaining precise membrane tension across process variations.
• High Measurement Linearity: Provides accurate, repeatable results with linearity error below 2% within 0–10 ppm and below 3% up to 20 ppm.
• Automatic Temperature Compensation: Integrates internal temperature sensing to automatically adjust for temperature-induced membrane permeability changes.

Important Usage & Installation Precautions

• System Dependency: The -02 Total Chlorine variant must be used with the Rosemount TCL Sample Conditioning System, which continuously feeds potassium iodide and acid reagent to react with total chlorine before reaching the sensor.
• Polarization & Stabilization Time: When replacing the electrolyte solution or installing a new sensor, allow several hours under polarizing voltage for the sensor current to stabilize before zero-point or full-scale calibration.
• Bladder & Cathode Protection: Never use sharp tools or excessive force near the internal rubber bladder during electrolyte maintenance, as punctures will ruin the sensor assembly.
• Pressure & Temperature Limits: Maintain sample conditions strictly within 0 to 65 psig and 0 to 50 °C to prevent membrane ruptures or inaccurate readings.
• Grab Sample Calibration: Because stable dilute total chlorine standards are unavailable, calibrate the full scale using a fresh grab sample tested via DPD titration or laboratory methods.

Applications

• Municipal Water Treatment: Continuous total chlorine measurement in drinking water distribution and discharge monitoring.
• Wastewater Effluent Control: Monitoring residual total chlorine following final chlorination/dechlorination processes.
• Industrial Cooling Towers: Chlorine dosing control for bio-fouling prevention in open recirculating cooling systems.
• Food & Beverage Processing: Monitoring wash water disinfection and process water quality control.
• Aquaculture & Bottled Water Facilities: Ensuring chlorine levels remain strictly within target regulatory limits.

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