Chlorine Measurement in Food Canning
Effective Control of Chlorine in Food Canning Manufacturing
Simple & Reliable Chlorine Measurement
Large manufacturers of canned foods use chlorine as part of their food processing operations. The food is cooked in sealed metal cans by a steam cooker. When the steam cooking is complete, water is used to cool the cans. And as the cans become vacuum sealed in the cooler, minute amounts of water may be drawn into the cans. This water must be bacteria free, or it could contaminate the food. To disinfect the water to prevent food contamination, a low concentration of chlorine is used. The Rosemount™ 499ACL Free Chlorine Sensor can be mounted directly in the process to provide reliable chlorine measurement. The Rosemount 3900 pH Sensor can also be used for pH compensation of the chlorine measurement.
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Product Solutions
The Rosemount 499ACL Chlorine Sensors are used for measuring free chlorine, total chlorine or monochloramine. The free chlorine sensor doesn't require sample pre-treatment or expensive reagents to maintain. The total chlorine sensor eliminates the need for pH correction with a standard reagent sampling system. And the monochloramine sensor doesn't not use reagents or sample pre-treatment for measurement. All three chlorine sensors have an easily replaceable membrane that does not require special tools. These amperometric sensors are ideal for use in drinking water applications.
- Measure free chlorine without sample pretreatment
- No messy and expensive reagents needed
- Automatic correction to at least pH 9.5
Measurement Range
0 to 10 ppm (mg/L) as Cl2. For higher ranges, consult the factory
Operating Temperature
32 to 122 °F (0 to 50 °C)
Operating Pressure
0 to 65 psig (101 to 549 kPa)
The Rosemount 1056 Transmitter offers single or dual sensor input with an unrestricted choice of dual measurements, reducing the cost per loop and saving panel space. This multi-parameter liquid analysis transmitter offers a wide range of measurement choices, including differential conductivity, dual oxygen and many other combinations supporting most industrial, commercial and municipal applications. The modular design of the transmitter allows signal input boards to be field replaced making configuration changes easy.
- Fast and easy installation using Quick Start programming, auto-recognition of sensor boards and modular design
- Large customizable display provides at-a-glance view of pertinent information
- Visibility of process parameters by utilizing HART® or Profibus DP digital communications
Enclosure Rating
Polycarbonate. Type 4X, IP65.
Certifications/Approvals
FM/CSA/UL (See Product Data Sheet for complete list of certifications.)
Dimensions
Overall 155 x 155 x 131mm (6.10 x 6.10 x 5.15 in.). Cutout: 1/2 DIN 139mm x 139mm (5.45 x 5.45 in.)
The Rosemount 3900 pH Sensor / ORP Sensor features a double junction reference that aids in the sensors' resistance to harsh environments and helps prolong sensor life. The double junction protects the reference element from poisoning ions-such as ammonia, chlorine, cyanides, and sulfides. Both sensors are made with a porous Teflon® junction. The robust ph/ORP sensor design provides reliability in a wide range of aqueous solutions found in pipelines, open tanks or ponds.
- Extended pH sensor / ORP sensor life and protection against poisoning ions using a double junction reference
- Enhanced performance and increased life with cracking resistant glass
- Maximum chemical resistance provided by a rugged polyphenylene sulfide body
Operating Temperature
–10° to 100°C (14° to 212°F)
Max. Operating Pressure
Maximum Pressure: 790 kPa [abs] (100 psig) at 100°C (212°F)
Materials of Construction
Stainless steel, glass, Teflon®, polyphenylene sulfide (PPS), EPDM and silicone (If selecting the ORP sensor, an additional wetted material is Platinum.)
The Rosemount FCL Free Chlorine Measuring System measures free chlorine in fresh water. The free chlorine system includes a transmitter (Rosemount 56 Transmitter or Rosemount 1056 Transmitter), a Rosemount 499ACL Free Chlorine Sensor, a pH sensor (if required) and a constant head flow controller. The transmitter and flow controller are mounted on a back plate, and quick disconnect Variopol (VP) sensor cables are pre-wired to the transmitter, making installation and startup fast and easy.
- Complete system includes free chlorine sensor, connecting cable, transmitter and flow controller (pH sensor if selected)
- Continuous pH correction eliminates expensive and messy reagents and troublesome sample conditioning systems
- Measures free chlorine in samples having pH levels as high as 9.5
Measurement Range
0 to 10 ppm as Cl2. For higher ranges, consult the factory.
Accuracy
Accuracy depends on the accuracy of the chemical test used to calibrate the free chlorine sensor
Temperature Range
32 to 122°F (0 to 50°)
