# AST UPAS — Access Sensor Technologies

> Access Sensor Technologies (iPhone/iPad app by Access Sensor Technologies.)

- Source: https://appshunter.io/ios/app/ast-upas/id1543735564 (this page in markdown: same URL + `.md`)
- Developer: [Access Sensor Technologies](https://appshunter.io/developer/1437331333)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 12.0 · 11 MB
- Languages: English
- Released: 2021-09-02
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/ast-upas/id1543735564/reviews.md

## What is AST UPAS?

Use this application to set sampling parameters for Access Sensor Technologies’ Ultrasonic Personal Aerosol Sampler (UPAS). Parameters that can be adjusted using this application include the name, cartridge id, start time, duration, flow rate, and duty cycle for each filter sample. Make sure any mobile device that you will use to program the UPAS is running iOS 12 or later.


## Version history (last 5 releases)

### 1.1.2 — 2025-05-22

Log interval toggle option has been removed and defaults to 30s for rev158 and earlier firmware.
Flow offset range adjusted to +/-9%.
CO2 calibration description indicates 5 minute calibration instead of 15 minutes to match rev200 and later firmware operation.
Description added to Filter Flow Duty Cycle menu option to explain the duty cycle options.
Descriptions added for each PM sensor mode.

### 1.0.4 — 2022-12-28

Bug fixes for v2.1 and app field availability

### 1.0.3 — 2022-09-30

Adds in sampler configuration option and replaces any special character in cartridge id and sample name with an "_".

### 1.0.2 — 2022-09-10

removed ability to use special characters in the sample name and cartridge id

### 1.0.1 — 2022-06-17

Bug fixes, minor layout changes, compatibility with latest hardware changes.

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## More apps by Access Sensor Technologies

- [Test Strip Analyzer](https://appshunter.io/ios/app/test-strip-analyzer/id1437331334)
- [AST ASPEN](https://appshunter.io/ios/app/ast-aspen/id1532575631)

All apps by Access Sensor Technologies: https://appshunter.io/developer/1437331333

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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 2026-05-16.*