---
product_id: 281217597
title: "552i Wireless Digital Vacuum Probe - Vacuum Gauge for HVAC Systems with IP54 Protection – 45° Service-Port Design - HVAC Tool for AC/R System Evacuation with Bluetooth and App"
brand: "testo"
price: "VT67073"
currency: VUV
in_stock: true
reviews_count: 13
category: "Testo"
url: https://www.desertcart.vu/products/281217597-552i-wireless-digital-vacuum-probe-vacuum-gauge-for-hvac-systems
store_origin: VU
region: Vanuatu
---

# 45° angled service-port design Bluetooth wireless connectivity IP54 dust & splash protection 552i Wireless Digital Vacuum Probe - Vacuum Gauge for HVAC Systems with IP54 Protection – 45° Service-Port Design - HVAC Tool for AC/R System Evacuation with Bluetooth and App

**Brand:** testo
**Price:** VT67073
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your HVAC game with precision and wireless freedom!

## Quick Answers

- **What is this?** 552i Wireless Digital Vacuum Probe - Vacuum Gauge for HVAC Systems with IP54 Protection – 45° Service-Port Design - HVAC Tool for AC/R System Evacuation with Bluetooth and App by testo
- **How much does it cost?** VT67073 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/281217597-552i-wireless-digital-vacuum-probe-vacuum-gauge-for-hvac-systems)

## Best For

- testo enthusiasts

## Why This Product

- Trusted testo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart App Integration:** Document, control, and share your vacuum measurements instantly via the testo Smart App—stay connected and ahead of the curve.
- • **Built to Brave the Jobsite:** Rugged IP54-rated housing ensures reliable performance in harsh HVAC environments—work smarter, not harder.
- • **Seamless Wireless Workflow:** Bluetooth-enabled for real-time data streaming to your smartphone or digital manifold—cut setup time and refrigerant loss.
- • **Precision at Your Fingertips:** Achieve ultra-accurate vacuum readings down to 1 micron resolution—no guesswork, just confidence.
- • **Ergonomic 45° Service-Port Design:** Quick, stress-free installation with an angled probe that fits perfectly on any service port—maximize efficiency on every job.

## Overview

The testo 552i Wireless Digital Vacuum Probe is a cutting-edge HVAC tool designed for precise vacuum measurement with 1 micron resolution. Featuring Bluetooth connectivity, an ergonomic 45° angled service-port design, and robust IP54 protection, it streamlines evacuation tasks by wirelessly transmitting live data to the testo Smart App or digital manifolds. This lightweight, app-controlled gauge enhances workflow efficiency, reduces refrigerant loss, and supports professional HVAC technicians in delivering leak-free system evacuations with confidence.

## Description

testo 552i vacuum probe – Accurate, app-controlled vacuum measurementsThe testo 552i Micron Gauge measures vacuum via just one service port and with no loss of refrigerant. Its handy, robust and clever design support HVAC technicians with numerous intelligent features like the graphic display of measurement data in the testo Smart App or on the manifold’s display. Its smart Bluetooth integration allows for data to be stored and evaluated reliably and efficiently, thus saving precious time and resources.Technical data testo 552i:Measuring range: 0 to 0.39 psi; 0 to 26.66 mbar; 0 to 20000 micronAccuracy: ±(10 micron + 10 % of mv) (100 to 1000 micron)Protection class: IP54Resolution:1 micron (0 to 1000 micron) ; 10 micron (1000 to 2000 micron) ;100 micron (2000 to 5000 micron)Battery life: 39 hoursBattery type: 3 x AAA micro batteriesConnection: 7/16” UNFMeasuring range: 0.5 secWeight: 142 gDimensions: 150 x 32 x 31 mmOperating temperature: -10 to +50 °CStorage temperature: -20 to +50 °CSystem requirements: requires iOS 11 or higher; requires Android 6 or higher; requires mobile end device with Bluetooth 4.0Scope of delivery:1 x testo 552i vacuum gauge, banderole, instruction manuals and calibration protocols, 1 x Carton box packaging

Review: Good value. Keep it clean. - So overall this is a good unit. I was slightly hesitant to buy a gauge that was 100% Bluetooth with no built-in screen. So far that hasn't been an issue and I do like being able to monitor it from inside the building or my truck. I believe the gauge is accurate and effective. I did originally have one major issue while learning how to use it. You must not get any refrigerant or nylog inside the probe. Apparently I got some nylog inside the fitting and it gave some bizarre readings. Look at the screenshots. I cleaned the unit with 99% alcohol I connected it directly to the vacuum pump and cleaned it out. Afterwards it was good and reliable. One big note! Do not apply excessive pressure to this probe! 300 PSI will destroy the gauge. I usually apply 10 PSI of pressure to the system before disconnecting the vacuum gauge to prevent contamination. Once it's disconnected I then charge the system to the maximum.
Review: Testo - A complete HVAC testing system - The Testo High Pressure Gauge and Vacuum Gauge are vital tools in an HVAC kit. I recently installed a mini-split that required you to evac the linesets before releasing the refrigerant. I had decided on the Testo platform and already had their Digital Manifold, as well as their wireless probes. I decided to get their vacuum probe to add into the ecosystem. These connect very easily to the system, though I do recommend using them alongside with a core removal tool so you can easily isolate and disconnect them. Actually, the setup I used was: HVAC Port to Core Removal Tool. Once you remove the core, I connected that online to the Vacuum Pump. On the access port on the core removal tool, I had another core depressor (not remover) and then connected the vacuum gauge to the core depressor. This way, You can evac the system to the vacuum pump, and shut off to isolate the system to an evac standing test. I pumped the system down to 200-300 microns, and let it stand for 15-20 minutes. If the system doesn't rise past 500 microns within 10 minutes, its considered a 'leak-free' system, and ready to release refrigerant. At this time, I closed off the core depressor valve, so that everything was 'off' and the released the refrigerant. This is recommended so that refrigerant doesnt get into the vacuum gauge. Though I'm sure it would be fine, I wanted to take the extra precaution. I'm very happy with the testo tools, and that you can save all the data to the App for future review. Since these don't need to be connected with hoses, if you dont want to, you are also potentially losing less refrigerant when using them (talking about the high side pressure gauges, not the vacuum gauge).

## Features

- Accurate: The testo 552i vacuum gauge delivers precise deep-vacuum measurements down to single-digit resolution, giving you confidence that evacuation targets are reliably reached and verified—no guesswork, no unnecessary waiting
- Easy-to-use: The micron gauge features an integrated 45° angle for quick, stress-free installation at any service port, while the robust IP54 housing ensures dependable operation even in demanding HVAC environments
- Clever: For wireless vacuum measurement, the testo 552i vacuum gauge automatically connects to digital manifolds and operates via a single service port. Saving time, reducing setup complexity, and preventing refrigerant loss
- Efficient: The hvac tool enables fast vacuum assessment and displays live measurement data directly on the digital manifold and in the testo Smart App, so you can make informed decisions without interrupting your workflow
- Smart App: Use the Smart App to clearly document results on your smartphone or tablet, control service and maintenance tasks remotely, and send reports directly from the job site - saving time on documentation and follow-up

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08TZ3Z1S3 |
| Batteries | 3 AAA batteries required. (included) |
| Best Sellers Rank | #37,615 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #167 in Test Probes & Leads |
| Date First Available | January 25, 2021 |
| Item Weight | 2.82 ounces |
| Item model number | 552i |
| Manufacturer | Testo SE & Co. KGaA |
| Product Dimensions | 5.9 x 1.3 x 1.2 inches |

## Images

![552i Wireless Digital Vacuum Probe - Vacuum Gauge for HVAC Systems with IP54 Protection – 45° Service-Port Design - HVAC Tool for AC/R System Evacuation with Bluetooth and App - Image 1](https://m.media-amazon.com/images/I/81ek9QwPMyL.jpg)

## Questions & Answers

**Q: Can it be used individualy off Manifolds ?**
A: Yes, you can use the app to monitor, record, and review without any manifold.

**Q: Does this connect to a 1/4" SAE male flare fitting?**
A: Yes.

**Q: can this withstand positive pressure, say up to 100psi?**
A: It can take max 5bar or (72.51psi) or the amount of wind my ex can produce but no not 100psi

**Q: Is this purchase through an authorized distributor per the Testo warranty, and if so, who is the distributor?**
A: Purchased through Amazon.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value. Keep it clean.
*by T***I on February 9, 2025*

So overall this is a good unit. I was slightly hesitant to buy a gauge that was 100% Bluetooth with no built-in screen. So far that hasn't been an issue and I do like being able to monitor it from inside the building or my truck. I believe the gauge is accurate and effective. I did originally have one major issue while learning how to use it. You must not get any refrigerant or nylog inside the probe. Apparently I got some nylog inside the fitting and it gave some bizarre readings. Look at the screenshots. I cleaned the unit with 99% alcohol I connected it directly to the vacuum pump and cleaned it out. Afterwards it was good and reliable. One big note! Do not apply excessive pressure to this probe! 300 PSI will destroy the gauge. I usually apply 10 PSI of pressure to the system before disconnecting the vacuum gauge to prevent contamination. Once it's disconnected I then charge the system to the maximum.

### ⭐⭐⭐⭐⭐ Testo - A complete HVAC testing system
*by C***S on October 14, 2023*

The Testo High Pressure Gauge and Vacuum Gauge are vital tools in an HVAC kit. I recently installed a mini-split that required you to evac the linesets before releasing the refrigerant. I had decided on the Testo platform and already had their Digital Manifold, as well as their wireless probes. I decided to get their vacuum probe to add into the ecosystem. These connect very easily to the system, though I do recommend using them alongside with a core removal tool so you can easily isolate and disconnect them. Actually, the setup I used was: HVAC Port to Core Removal Tool. Once you remove the core, I connected that online to the Vacuum Pump. On the access port on the core removal tool, I had another core depressor (not remover) and then connected the vacuum gauge to the core depressor. This way, You can evac the system to the vacuum pump, and shut off to isolate the system to an evac standing test. I pumped the system down to 200-300 microns, and let it stand for 15-20 minutes. If the system doesn't rise past 500 microns within 10 minutes, its considered a 'leak-free' system, and ready to release refrigerant. At this time, I closed off the core depressor valve, so that everything was 'off' and the released the refrigerant. This is recommended so that refrigerant doesnt get into the vacuum gauge. Though I'm sure it would be fine, I wanted to take the extra precaution. I'm very happy with the testo tools, and that you can save all the data to the App for future review. Since these don't need to be connected with hoses, if you dont want to, you are also potentially losing less refrigerant when using them (talking about the high side pressure gauges, not the vacuum gauge).

### ⭐⭐⭐⭐⭐ It's PERFECT. A DIY mini-split installers best find.
*by D***Y on November 16, 2023*

This German designed Testo vacuum probe is amazing and at half the cost of the ones with a digital LCD screen, this uses your iPhone or android as the readout. It works well for mini split vacuum monitoring, select "evacuation" from the long list of devices that app supports. And fire it up. Piece of cake. IMPORTANT.... Watch the triple evacuation video on Youtube from HVAC Tips guy ... I used his simple setup with two Appion Core removal tools. I did lose an hour wondering if the thing was working then I found and removed a "3rd" schrader valve, one was in the 5/8 Appion core removal tool, one in the 1/4" Appion core removal tool, in addition to the schrader inside the minisplit port. Once all three were gone, the vacuum sucked down fast and this gauge worked amazing. Was wondering if I should have bought CPS or another larger unit but paired with my iPhone over bluetooth it works great. VERY HAPPY with this gauge and price, it made the vacuum part of the DIY install go smooth. BTW, if you're wondering what a schrader valve is, it's the same little screw in tiny valve that holds air in your tires. It works one way. No mystery to that thing. Those Appion core removal tools worked great.

## Frequently Bought Together

- Testo 552i App-Controlled Wireless Vacuum Probe I for HVAC Systems – with Bluetooth
- Appion MGAVCT 1/4" MegaFlow Vacuum-Rated Valve Core Removal Tool
- Appion MGAVCR Mega Flow Vacuum Rated Valve Core Removal Tool – 5/16" System Connection

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-21*