AIM Technology Inc.

Advanced Inprocess Monitoring Systems

Phone (215) 872-1692

Loading...

Thermocouples

For a wide range of operating temperatures, quick response time and durable designs at an affordable price!

Shop Now

RTDs

High accuracy and repeatability in temperature measurement for critical applications!

Shop Now

Thermocouple Feedthroughs

Easy installation and durable designs for furnace applications supporting up to 14 thermocouple pairs!

Shop Now

Temperature Monitoring Sensors

Temperature Monitoring Probes and Feedthrough Assemblies

AIM temperature monitoring probes and sensor products provide accurate and reliable temperature monitoring and control for all of your process and environmental testing needs.

We offer standard and custom thermocouple and RTD probes as well as environmentally sealed and vacuum tight feedthroughs to meet the specific requirements of your application. Our temperature sensors feature straight, bent, and flexible rugged metallic protection tubes in a variety of materials including 304SS, 316SS, 310SS, 446SS, Inconel, and HR160. Base metal thermocouple types (J, K, T, E) utilize beaded ceramic insulating elements for a standard cost effective, yet durable assembly. High temperature thermocouple assemblies utilize ceramic protection tubes with noble metal thermocouple types (S, R, B). Protection tube materials include mullite, high purity alumina, and recrystallized silicon carbide for custom multi-tube assemblies. Double and triple tube designs are available for protection against thermal and mechanical shock. These units provide optimum performance at temperatures ranging from 1500ºF to 3100ºF. Our wide variety of protection tube materials insure resistance to corrosion in the harshest of environments.

Thermocouples and RTDs

What is a Thermocouple?

A thermocouple is a simple, mechanically robust, electrically versatile and inexpensive temperature sensor. Thermocouples can be used over a wide range of temperatures for monitoring and process control applications. A thermocouple consists of two dissimilar metal wires, joined at one end. When the joined end is heated there is a continuous flow of current. The net open circuit voltage (Seebeck voltage) is a function of the junction temperature and the composition of the two metals. As a result this means that when the junction of the two metals is heated, or cooled, a voltage is produced that can be correlated back to the temperature.

What is an RTD?

A Resistance Temperature Detector (RTD) is a device that contains an electrical resistance element, referred to as a “sensing element”, which changes its resistance value as its temperature changes. This change in electrical resistance with temperature can be measured and used to determine the temperature of a process or of a material. RTD sensing elements come in two basic styles, wire wound and film. Wire wound elements contain a length of very small diameter wire which is either wound into a coil and packaged inside a ceramic mandrel, or wound around the outside of a ceramic housing and coated with an insulating material. The film type sensing elements are made from a metal coated substrate that has a resistance pattern cut into it. This pattern acts as a long, flat conductor which provides a known electrical resistance. Lead wires are bonded to the metal coated substrate.

Benefits of Thermocouples vs. RTDs

Both types of temperature sensor have a particular set of operational and environmental conditions for which their use is best suited.

CharacteristicThermocoupleRTD
Temperature RangeExcellentGreat
Temperature Low-210 °C-240 °C
Temperature High1760°C650°C
LinearityFairGood
SensitivityLowMedium
Response TimeMedium to FastMedium
StabilityFairGood
AccuracyMediumHigh
Susceptible to Self-Heating?NoYes, Minimal
DurabilityExcellentGood
Cost LowestHigh
Signal Conditioning RequirementsCold-Junction Compensation
Amplification
Open Thermocouple Detection
Scaling
Excitation
Lead Resistance Correction
Scaling

P: 1-215-872-1692    E: sales@aimtsystems.com

1309 Dogwood Lane Huntingdon Valley PA 19006

© 2009-2017 AIM