# GTG Device Manager

> GTG Device Manager (iPhone/iPad app by senko inc.,.)

- Source: https://appshunter.io/ios/app/gtg-device-manager/id6463708321 (this page in markdown: same URL + `.md`)
- Developer: [senko inc.,](https://appshunter.io/developer/1439414569)
- Category: Productivity, Business
- Price: Free
- Age rating: 17+
- Requires: iOS 16.4 · 11 MB
- Languages: American English
- Released: 2023-08-31
- Data updated: 2026-09-02
- User reviews in markdown: https://appshunter.io/ios/app/gtg-device-manager/id6463708321/reviews.md

## What is GTG Device Manager?

SENKO GTG Device Manager App.
SI-Series and SP-Series detectors was developed to prevent unfortunate accidents caused by gas explosions in hazardous places such as plants, gas storages, and factories.
When installed in hazardous area, Toxic gas detector SI-Series will regularly and continuously detect the gas leakage and display the data with FND and to supply 4-20mA standard output.


## Version history (last 5 releases)

### 2.52 — 2026-08-24

Improved Decimal Display for O₃ Measurement Values

### 2.51 — 2026-07-14

Added support for SI-100IM Firmware Version 3.0

### 2.5 — 2026-06-16

Added firmware upgrade support for SI-300 devices
Added support for Duo Devices using a single sensor

### 2.41 — 2026-04-22

Added CO range (2000 ppm) support to Duo Devices.

### 2.4 — 2026-04-13

Minor bug fixes and optimizations.

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## More apps by senko inc.,

- [Breeze](https://appshunter.io/ios/app/breeze/id1439414570)
- [Blow](https://appshunter.io/ios/app/blow/id1454341735)

All apps by senko inc.,: https://appshunter.io/developer/1439414569

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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 2026-09-02.*