# Spot Size Calculator — IR sensors / thermal imagers

> IR sensors / thermal imagers (iPhone/iPad app by Fluke Process Instruments GmbH.)

- Source: https://appshunter.io/ios/app/spot-size-calculator/id1401963715 (this page in markdown: same URL + `.md`)
- Developer: [Fluke Process Instruments GmbH](https://appshunter.io/developer/1401963714)
- Category: Business, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 11.0 · 3 MB
- Languages: American English
- Released: 2018-07-26
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/spot-size-calculator/id1401963715/reviews.md

## What is Spot Size Calculator?

The spot size calculator computes the spot size for non-contact temperature sensors such as infrared pyrometers, infrared line scanners and thermal imagers. So it provides conservative estimates of the resulting measurement spot diameter depending on the sensor model selected and as a function of its mounting distance to the measurement target. 
Values displayed are intended to be estimates to help you get the best measurement and may differ in some cases from the exact values.


## Version history (last 5 releases)

### 2.9.0.2 — 2023-06-02

Thermoview: adding new series TV30 thermal imagers 
Bug: mitigating readability problems for the title bar due to an overlapping with the notch for selected iPhone models (iPhone X, 11, 12, 13, 14)

### 2.7 — 2022-09-07

•	Thermalert 4.0: adding new flame models CO, NOX, CO2
•	MP150 linescanner: models 1M and 2M removed (migrated into FPI branded MP linescanner)
•	ScanIR3 linescanner: models 310 and 320 removed (migrated into FPI branded MP linescanner)
•	TX, XR, MM, and Mod 7 series moved to the new generated archive
•	MI3100: effective lens diameter corrected to 10.3 mm
•	MP linescanner: effective lens diameter adapted in accordance with the selected spectral model

### 2.6 — 2021-08-31

- TV43: revised pixel size calculation due to correction of pixel pitch to 24 µm
- TV40 series: corrected conversion when selecting "ft" as length unit
- Rectified user interface for pyrometers with variable focus distances

### 2.5 — 2021-04-28

Adding new MP linescanner series with up to 300 Hz scan speed

### 2.4 — 2021-02-27

• Thermalert 4.0: adding new model LTD (for very dusty environments)
• Endurance Compact: user interface for video size calculation improved

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## More apps by Fluke Process Instruments GmbH

- [Paqfile Viewer](https://appshunter.io/ios/app/paqfile-viewer/id1504770558)
- [Datapaq Insight Mobile](https://appshunter.io/ios/app/datapaq-insight-mobile/id1505347269)

All apps by Fluke Process Instruments GmbH: https://appshunter.io/developer/1401963714

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*