# ANSI/IEEE thermometer/pyrometer symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-pyrometer-indication
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: PYR
Drawing use: Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Instrumentation and Sensors form: Thermometer/Pyrometer
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.
Related representation: [Pyrometer indication](https://eloragrid.ai/symbols/iec-pyrometer-indication)

IEEE-library thermometer/pyrometer form for high-temperature indication, often from thermocouples or radiation sensors.

## In plain English

### What does ANSI/IEEE thermometer/pyrometer mean?

Pyrometer indication is used where temperatures are too high for ordinary thermometers, such as furnaces, kilns and exhaust gas. The instrument is commonly fed from a thermocouple or an optical radiation sensor, so the input wiring and any cold-junction compensation must be shown with the instrument.

### A simple example

The form identifies the indicating instrument, not the sensing principle. A radiation pyrometer and a thermocouple pyrometer look the same at the instrument circle, and emissivity settings or sensor range limits must come from the instrument data.

### What the drawings help you do

Identify the sensing element feeding the pyrometer. Check for cold-junction compensation when a thermocouple is used. The pyrometer form signals a high-temperature indicator; the general thermometer form covers ordinary temperature indication.

### This particular reference

IEEE-library thermometer/pyrometer form for high-temperature indication, often from thermocouples or radiation sensors. The pyrometer form signals a high-temperature indicator; the general thermometer form covers ordinary temperature indication.

### Terms

- Signal: Electrical information passed between devices, rather than necessarily the main power supply.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [Autodesk IEEE Symbol Preview — Instrumentation and Sensors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F44D5059-4728-40BD-B9BA-0DE7CFDFAACF.htm)
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/)


## What it represents

Pyrometer indication is used where temperatures are too high for ordinary thermometers, such as furnaces, kilns and exhaust gas. The instrument is commonly fed from a thermocouple or an optical radiation sensor, so the input wiring and any cold-junction compensation must be shown with the instrument.
The form identifies the indicating instrument, not the sensing principle. A radiation pyrometer and a thermocouple pyrometer look the same at the instrument circle, and emissivity settings or sensor range limits must come from the instrument data.

## How to read it

- Identify the sensing element feeding the pyrometer.
- Check for cold-junction compensation when a thermocouple is used.

## Information to show or reference

- Name the sensing principle
- State the temperature range
- Reference compensation or emissivity setting

## Important distinction

The pyrometer form signals a high-temperature indicator; the general thermometer form covers ordinary temperature indication.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview, Instrumentation and Sensors
- Public vendor block name: HIN1P25 / VIN1P25 (Autodesk identifier; not an IEEE symbol number)
- Typical use: Furnace, kiln and exhaust temperature indication
- Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified

## Public references

- [Autodesk IEEE Symbol Preview — Instrumentation and Sensors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F44D5059-4728-40BD-B9BA-0DE7CFDFAACF.htm) — Autodesk. Public IEEE-oriented Instrumentation and Sensors preview listing the Thermometer/Pyrometer block and its vendor identifier.
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.