Temperature Control

"Instruments and controls used for measuring, regulating, or recording temperatures, pH, aciditiy, water activity, or other conditions that control or prevent the growth of undesirable microorganisms in food shall be accurate and adequately maintained and adequate in number for their designated uses." CFR 21, Part 110.40

Recording thermometers are used to produce a record of temperatures at critical points in the process, during storage or even during shipment of finished products.

• Recording Product Temperatures During Processing
• Continuous Monitoring of Plant Environmental Temperatures
• Temperature Logs Created as Product is Transported
• Select a Chart
• Pens and pen kits as reliable marking instruments

In line indicating thermometers confirm temperatures recorded on temperature control charts. These are mounted near recording devices to detect unacceptable deviations of product temperature from recorded values. They are also used to confirm temperatures of CIP solutions and tanks or silos holding liquid raw materials prior to processing.

• Highly accurate mercury in glass thermometers still set the standard
• Digital in-line thermometers are an alternative to mercury in glass
• Dial thermometers serve a variety of purposes

Hand held thermometers are used to spot check temperatures of incoming raw materials and packaged products. They are also used to confirm temperatures when indicating thermometers are not available.

• Digital thermometers are used widely by quality assurance and production personnel
• Infrared thermometers are useful when probe immersion is unsanitary or impractical
• Bi-metal thermometers are economical and easily calibrated

Reference thermometers are used to check all temperature measuring devices. The frequency of this verification is usually specified by regulatory guidelines.

• Fahrenheit thermometers are still the most common in the United States
• Centigrade thermometers will become more common as a metric standard

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