pH Measurement in Algin Protein Production
Control pH to ensure a maximum protein yield
Resists Coating for Accurate pH Measurement
Algin is a protein derived from kelp, and is widely used in a variety of foods such as ice cream, mayonnaise and pet food. Algin is obtained from kelp in a two-step process. In the digestion phase, the kelp is first digested at a pH level of 12.5. This mixture is then acidified to a pH level of 1.2 - 1.5, where the algin is precipitated and separated. The acidification must be carefully controlled for maximum yield. If the pH level falls below 0.9, the algin will be destroyed. If the pH level is higher than 2, not all of the algin will be precipitated. During the precipitation phase, the mixture becomes a thick slurry and can coat the pH glass. However, pH can be measured successfully by using a coating-resistant pH sensor like the Rosemount™ 396P pH Sensor with shrouded tip or flat glass.
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Product Solutions
The Rosemount 396 pH Sensor, with integral cable, is ideal for pH measurement in harsh, dirty, and abrasive applications with large quantities of suspended solids. A robust sensor design and robust reference technology allow for reliable pH measurements in a wide range of the toughest applications.
- SMART enabled to eliminate field calibration
- Minimum sensor maintenance due to robust reference technology helps ensure steady pH signal when sensor is coated
- Maximum pH sensor life due to helical reference pathway which hinders reference poisoning
Weight
0.45 kg/0.9 kg (1 lb/2 lb)
Ambient Temperature
0-100 °C (32-212 °F)
Dimensions
15 ft coaxial with BNC
The Rosemount 396R pH Sensor / ORP Sensor, with integral cable, is specifically designed for improved life in harsh, dirty applications where a separate sample stream is difficult to provide and greater insertion depths are required. This pH/ORP sensor is designed for use with a 1-1/4 in. or 1-1/2 in. ball valve for tap installation.
- Minimum maintenance due to robust reference technology helps ensure a steady signal when pH sensor / ORP sensor is coated
- Retractable design for use with ball valve assemblies
- Versatile mounting options feature either a 21" or 3" titanium tube sensor length
Measurement Range
pH sensor: 0 to 14ORP sensor: -1500 to 1500 mV
Operating Pressure
Hemi-bulb: 0 to 150 psig (0 to 10.34 barg)Flat-bulb: 0 to 100 psig (0 to 6.89 barg)
Max Operating Pressure
(at retraction or insertion)
21 in. tube 64 psig (4.41 barg)
36 in. tube 35 psig (2.41 barg)
21 in. tube 64 psig (4.41 barg)
36 in. tube 35 psig (2.41 barg)
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.)
