# SensorLogger Sensor Monitor — Bluetooth Sensor Monitor

> Bluetooth Sensor Monitor (iPhone/iPad app by Hydrotechnik UK Test Engineering Ltd.)

- Source: https://appshunter.io/ios/app/sensorlogger-sensor-monitor/id6736585953 (this page in markdown: same URL + `.md`)
- Developer: [Hydrotechnik UK Test Engineering Ltd](https://appshunter.io/developer/1515531717)
- Category: Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 13.0 · 25 MB
- Languages: American English
- Released: 2025-01-07
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/sensorlogger-sensor-monitor/id6736585953/reviews.md

## What is SensorLogger Sensor Monitor?

Sensor Logger allows users to connect to up to 4 compatible local pressure and/or temperature sensors to view and record live data and share saved data directly from their mobile device.


## Version history (last 5 releases)

### 4.4.0 — 2026-04-08

Calculation channels

Two new calculation channels are now available from the Calc button in the live screen.

- A-B Differential — shows the real-time difference between two connected pressure sensors
Power (PWR) — calculates hydraulic power (kW) from a pressure and flow sensor pair, with configurable efficiency
- Both channels can be given a custom name and colour, edited after creation, and removed. Your configuration is saved and automatically restored the next time you open the app with the same sensors connected.

Independent Y-axis per sensor

Each sensor tile (and calc channel tile) in both the devices and live screens now has a Y button. Tapping it gives that sensor its own independent Y axis on the graph, preventing a wide-range sensor (such as temperature) from compressing the graph line of a narrow-range one (such as pressure). The Y button is hidden when only one sensor is connected.

Edit sensor settings from the live screen

Sensor tiles in the live screen can now be tapped to open the sensor settings (name, unit, colour) directly, without having to navigate back to the devices screen.

Improvements

- The Live button is now always visible on the devices screen, greyed out when no sensors are connected, so it's clear the feature exists
- The record button flashes red on the graph screen while a recording is in progress
- After completing sensor setup, the app now automatically connects to the sensor
- Tapping Cancel during a recording now asks for confirmation before discarding the data
- PDF reports now show a place name (e.g. "Birmingham, UK") instead of raw GPS coordinates

Bug fixes

- Pressure values below zero (e.g. -0.5 bar) now display correctly on the graph — previously the graph line would never go below 0
- File export (CSV and PDF) on Android now works correctly across all Android versions
- Sensors with the MD prefix are now recognised and connectable

### 4.3.0 — 2026-04-01

Minor bug-fixes:
- Some sensors were not being found
- Auto-connect after initial sensor configuration
- Flash record button when recording
- Cancel button when recording was not discarding recorded data

### 4.2.0 — 2026-03-23

This is a major update, including several must-have new features:

- Flow measurement using Frequency to Bluetooth transmitters
- Multi-Y-axis display, per device
- Power calculation (using pressure and flow readings)
- Alarm threshold and indications
- Auto-record triggering, based on sensor conditions
- PDF test report generation

### 4.0 — 2026-03-04

Improved user experience.

### 2.6 — 2025-10-29

Improved data accuracy.

## Apps similar to SensorLogger Sensor Monitor

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sykes-Pickavant Pressure Pro](https://appshunter.io/ios/app/sykes-pickavant-pressure-pro/id6756418667) | — | Free | Utilities |
| [Oleotec DataPressure](https://appshunter.io/ios/app/oleotec-datapressure/id6738282085) | — | Free | Utilities |
| [BLE Scanner - Rapid BT connect](https://appshunter.io/ios/app/ble-scanner-rapid-bt-connect/id1515893845) | 4.2 (5) | $5.99 | Utilities |
| [SECA](https://appshunter.io/ios/app/seca/id6502897162) | 2.0 (4) | Free | Utilities |
| [SM Gauge](https://appshunter.io/ios/app/sm-gauge/id6752399677) | — | Free | Utilities |
| [Spradow Logger](https://appshunter.io/ios/app/spradow-logger/id6744066209) | — | Free | Utilities |

## More apps by Hydrotechnik UK Test Engineering Ltd

- [Watchlog](https://appshunter.io/ios/app/watchlog/id1520386269)
- [Watchlog Bluetooth](https://appshunter.io/ios/app/watchlog-bluetooth/id6479214506)
- [Watchlog Pro Configurator](https://appshunter.io/ios/app/watchlog-pro-configurator/id6783477053)

All apps by Hydrotechnik UK Test Engineering Ltd: https://appshunter.io/developer/1515531717

## Related topics

[sensor logger](https://appshunter.io/ios/topics/sensor-logger)

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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 2026-08-31.*