How to select a Temperature sensor
** Performance Consideration**
1.Determine the range of temperature to be measured.
2.Identify the operating media that is being measured.
3.Determine the temperature accuracy (+ or - Degree ,+ or - % of reading)
4.Determine frequency response required.
5.Identify the temperature units you require
Fahrenheit Celsius Kelvin Rankine Reaumure
6.Determine over-temperature conditions? Will temperature ever exceed maximum of range? By how much?
Size constraints Probe length Location access
2.Process connection/pressure fitting
What is the maximum working pressure of the system?
- Characteristics of the media
Corrosive Viscosity Velocity On/Off cycling
mV /V 0-5 Vdc,0-10 Vdc,other Bipolar voltage Isolated or Non-isolated voltage 4-20 ma Current
Analog and Digital
Connector or integral cable Customer specified Need for mating connectors and cable assemblies Connector / Cable orientation Wiring codes / Pin-outs
5.External Zero and Span
6.Specify the type of power supply
1.Operating Temperature Range
3.IP or NEMA rating required
Intrinsic safe Explosion proof
5.Indoor or Outdoor use
Exposure to the element Dust dirt Temperature extreme Animal,critters,rodents etc.
6.Submersible or Subsea
Depth Case pressure
- Calibration requirement
2.Special approval / Certifications
3.Testing or Cleaning
4.Special Labeling requirement
5.Shock and Vibration resistance
How accessible must the unit be? How often will it be serviced?