TEMP
Temperature indicator
A temperature indicator displays the temperature derived from its specified sensor or input.
SLD / Schematic
IEEE / ANSI · T
ANSI/IEEE thermometer symbol
IEEE-library thermometer instrument form for a local or panel temperature reading taken from a sensor input.
In plain English
What does ANSI/IEEE thermometer mean?
The thermometer form is an indicating instrument circle whose input is a temperature sensor rather than a power circuit. On control schematics it sits at the end of a thermocouple, RTD or transmitter loop, so the important connections are the sensor wiring and any compensation or lead-resistance arrangement.
A simple example
The symbol identifies indication only. Alarm and trip set points belong to separate switch or relay contacts, and the measuring range, sensor type and accuracy class must be read from the instrument schedule because the circle carries none of that information.
What the drawings help you do
Follow the input back to the sensor and note its type (thermocouple, RTD or transmitter). Look for separate contacts if the instrument also gives alarms. A thermometer indicates temperature; a temperature switch changes contact state at a set point and may have no display at all.
This particular reference
IEEE-library thermometer instrument form for a local or panel temperature reading taken from a sensor input. A thermometer indicates temperature; a temperature switch changes contact state at a set point and may have no display at all.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Coil
- A wound conductor that can produce a magnetic field when energised.
- Terminal
- An identified point where a conductor connects.
Read the source: Autodesk IEEE Symbol Preview — Instrumentation and Sensors · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
IEEE / ANSI · Autodesk IEEE-oriented Instrumentation and Sensors form: Thermometer
Autodesk publishes this block under its IEEE Symbol Preview. The counterpart is the matching functional concept in the library; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · T
What it represents
The thermometer form is an indicating instrument circle whose input is a temperature sensor rather than a power circuit. On control schematics it sits at the end of a thermocouple, RTD or transmitter loop, so the important connections are the sensor wiring and any compensation or lead-resistance arrangement.
The symbol identifies indication only. Alarm and trip set points belong to separate switch or relay contacts, and the measuring range, sensor type and accuracy class must be read from the instrument schedule because the circle carries none of that information.
How to read it
- Follow the input back to the sensor and note its type (thermocouple, RTD or transmitter).
- Look for separate contacts if the instrument also gives alarms.
Information to show or reference
- Name the sensor and its location
- State the range and units
- Reference any alarm or trip contacts
A distinction that matters
A thermometer indicates temperature; a temperature switch changes contact state at a set point and may have no display at all.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Instrumentation and Sensors
Public IEEE-oriented Instrumentation and Sensors preview listing the Thermometer block and its vendor identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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