The temperature of an object is generally described by the relative "Hot" or "Cold" feeling of the item. Several reliable and reproducible methods exist to establish the relative "Hotness" or "Coldness" of an object and provide a quantitative indication of temperature. Out sensors provide a quantitative indication of temperature through a variety of methods including bulb and capillary, infrared, bimetal, thermocouple, thermistor and RTD.

Mercoid® temperature and level controls find wide application in high pressure and high temperature processes.
The application above shows a Mercoid® DA series bulb and capillary temperature control monitoring the temperature of media in a holding tank. This control can actuate an alarm when the media temperature exceeds the desired tempe3rature limit. A well in the side of the tank protects the bulb from the system pressure and it allows a removal of the bulb and control without disturbing the process. A Mercoid® Model 215, also shown, can be sued to control the level in the tank by turning on or off an electrically operated valve. This level control features an adjustable level setpoint from 1.5 to 24 inches and pressure/temperature ratings of 300 psi/500°F.

Noncontact temperature measurement using infrared thermometers.
Use Infrared Thermometers for noncontact, non-contaminating temperature measurement of food items. Quickly verify uniform heating or cooling in food display and food storage areas to eliminate spoilage and product waste. Monitor the temperature of ovens, ranges, deep fryers, and heated serving areas while maintaining a safe distance from the heat source. Check refrigeration and heating lines, compressors, motors, HVAC units, electrical connections, and circuit breakers to verify proper operation and determine trouble spots early.

Process temperature control using a Hi-Flow™ control valve, an I/P transducer and a Dwyer controller.
Pneumatic Hi-Flow™ control valves provide excellent control with high flow capacity, wide rangeability and tight shut-off capabilities. The application shown uses a Lin-E-Aire® linear control valve which apportions steam or water to the process. The valve regulates cooling water or steam flow depending on the process requirement resident in the temperature controller program. This package can be provided with a Precisor® positioner, a current to pressure transducer, Proximity position indicating transmitter and a Dwyer 1600 temperature controller with thermocouple.

Important Note: The control hook-ups and sketches and other application information shown in this bulletin are generalized and abbreviated to present the basic application only. We believe this application information to be reliable but it is intended for use by persons, at their own discretion, having technical skill and knowledge of the business. Neither Dwyer Instruments, Inc., nor any of its division including the Mercoid, W. E. Anderson, Proximity or Love Divisions shall be liable for loss, damage or expense directly or indirectly arising from the use of any product described herein. In no event shall any of these companies be liable for direct, indirect, special or consequential damages.