---
product_id: 28255978
title: "testo 557"
brand: "testo"
price: "$50419"
currency: MXN
in_stock: true
reviews_count: 8
url: https://www.desertcart.mx/products/28255978-testo-557
store_origin: MX
region: Mexico
---

# ±0.5% pressure accuracy 60 ft Bluetooth remote Temp range -58° to 302°F testo 557

**Brand:** testo
**Price:** $50419
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your HVAC game with testo 557 — precision, power, and connectivity in one compact tool!

## Quick Answers

- **What is this?** testo 557 by testo
- **How much does it cost?** $50419 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/28255978-testo-557)

## 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

- • **Precision You Can Trust:** Ultra-accurate pressure and temperature readings ensure flawless diagnostics every time.
- • **All-in-One HVAC Powerhouse:** Replace multiple tools with one sleek digital manifold—streamline your workflow and impress clients.
- • **Rugged & Ready for Any Job:** Weatherproof design and a protective hard case mean this tool thrives in any environment, rain or shine.
- • **Seamless Remote Monitoring:** Bluetooth connectivity lets you track and document measurements from up to 60 feet away—stay hands-free and efficient.
- • **Smart Automatic Calculations:** Instant superheating and subcooling values eliminate guesswork, boosting your confidence on every job.

## Overview

The testo 557 is a professional-grade digital manifold designed for HVAC/R technicians, combining high-precision pressure and temperature measurement with Bluetooth-enabled remote monitoring. It supports up to 60 refrigerants, features automatic superheat and subcooling calculations, and includes durable probes and a protective case. Engineered for efficiency and convenience, it replaces multiple tools and offers seamless job site documentation via a dedicated app.

## Description

testo 557 - Digital manifold for accurate measurement and documentation Installation and maintenance of air conditioning, refrigeration systems and heat pumps has never been more convenient. Store up to 60 refrigerants in just one instrument simply update them in the app and accurately measure high and low pressure along with evaporation and condensation temperature. Attached to the valve block inputs, the included pipe clamp probes reliably measure pipe temperature and provide simultaneous calculation of superheating and subcooling. The handy refrigeration app offers a variety of practical features. With a connection of up to 60 ft., the app offers remote monitoring of measurements in numeral form or graphical progression from a smartphone or tablet. Results can be quickly stored and sent directly from the job site via e-mail. Technical Data Temperature measuring range: -58° to +302°F / - 50° to +150°C Temperature measurement accuracy: ±0.9 °F / ±0.5 °C Pressure measuring range: -15 to 870 psi / -1 to 60 bar Pressure measurement accuracy: ±0.5 % of full-scale value Vacuum measuring range: 0 to 20000 micron Vacuum measurement accuracy: ± (10 micron + 10 % of mv) (100 to 1000 micron) Battery life: 250h (without illumination, without Bluetooth, without vacuum probe) Refrigerants in instruments: R114; R12; R123; R1233zd; R1234yf; R1234ze; R124; R125; R13; R134a; R22; R23; R290; R32; R401A; R401B; R402A; R402B; R404A; R407A; R407C; R407F; R407H; R408A; R409A; R410A; R414B; R416A; R420A; R421A; R421B; R422B; R422C; R422D; R424A; R427A; R438A; R437A; R442A; R444B; R448A; R450A; R449A; R453a; R452A; R454A; R454B; R455A; R454C; R458A; R502; R500; R503; R507; R718 (HO); R600a; R513A; R744 (CO) System requirements: requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0 Scope of Delivery: ✓ testo 557 digital 4-valve manifold including batteries ✓ 2 x clamp temperature probes ✓ Precise external Pirani probe for vacuum measurement ✓ Transport case ✓ Refrigeration app (free download)

Review: Bought one for Work and later bought one for myself - these units take the guess work out of superheat and subcooling, No need to have 3 or 4 instruments running just pop this unit on your line set and monitor what is going on. Some models have Bluetooth so you can monitor your Relative Humidity of the return Air (Saturated heat load) I bought the blue tooth add on. Fantastic system no guess work only way to mess this system up is to not pay attention.
Review: ease of use - can be used in rain without failing, can be used when stored in hot and cold weather, they are not effected by the extreme, easy to set up, small compared to most brands. Only issue is the hook, not good, will pop out of socket after about a years use but this to me is small compared to the work you will get out of them, hook does not effect operation.

## Features

- Efficient: The testo 557 is ideal for servicing air conditioners, refrigeration systems and heat pumps and replaces the multitude of tools needed by HVAC/R contractors and technicians
- Versatile: Accurately measure high and low pressure, evaporation and condensation temperature and take advantage of the automatic calculation of superheating and subcooling
- Convenient: Thanks to the 4-way valve and automatic heat pump mode, there is no need to switch over to different refrigerant hoses, which enables a quick and easy application
- Set: Includes two pipe clamp temperature probes, one external pirani probe for vacuum measurement as well as a protective hard case
- Refrigeration App: Follow all measurements remotely via Bluetooth from a smartphone or tablet. Send results directly from the job site for a more convenient documentation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0105Y3WI2 |
| Best Sellers Rank | #3,229,558 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6,081 in Multi Testers |
| Brand | Testo |
| Brand Name | Testo |
| Customer Reviews | 4.5 out of 5 stars 374 Reviews |
| Global Trade Identification Number | 04029547013409 |
| Included Components | instrument, case, batteries, vacuum gauge |
| Item Dimensions | 17.52 x 12.2 x 4.33 inches |
| Item Height | 11 centimeters |
| Item Weight | 1.2 Kilograms |
| Item dimensions L x W x H | 17.52 x 12.2 x 4.33 inches |
| Manufacturer | Testo, Inc. |
| Material | Polypropylene |
| Material Type | Polypropylene |
| Unit Count | 1.0 Count |
| Warranty Description | Testo offers a 2-year limited warranty from date of purchase on equipment or parts which fail in normal use because of defects in workmanship or materials. |

## Product Details

- **Brand:** Testo
- **Material:** Polypropylene
- **Item dimensions L x W x H:** 17.52 x 12.2 x 4.33 inches
- **Item Weight:** 1.2 Kilograms
- **Global Trade Identification Number:** 04029547013409

## Images

![testo 557 - Image 1](https://m.media-amazon.com/images/I/41LVrMypaXS.jpg)
![testo 557 - Image 2](https://m.media-amazon.com/images/I/512LlSG2qcS.jpg)
![testo 557 - Image 3](https://m.media-amazon.com/images/I/5196n9SxSqS.jpg)
![testo 557 - Image 4](https://m.media-amazon.com/images/I/51FufNxfj4S.jpg)
![testo 557 - Image 5](https://m.media-amazon.com/images/I/51Uv8n35nfS.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Does this have a micron gauge included**
A: Hello, yes micron gauge is included.

**Q: What type of battires and how long do they last?**
A: Hello, Battery life (4 x AA Alkaline) 250 h (less with use of Bluetooth, backlight and vacuum).

**Q: Hose sizes, are they all four 1/4"?**
A: This unit includes 4 hoses, each 5 ft long: 3 hoses (blue, red, yellow) with 7/16‘‘ UNF (straight and 45° angle), 1 Hose (yellow) with 5/8‘‘ UNF, (straight and 45° angle), suitable for all refrigerants.

**Q: Is their room in the case for the hose? Or would you need to disassemble every use to store in case?**
A: Thank you for your question. There is no separate room for the hose in the case.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bought one for Work and later bought one for myself
*by P***S on March 17, 2021*

these units take the guess work out of superheat and subcooling, No need to have 3 or 4 instruments running just pop this unit on your line set and monitor what is going on. Some models have Bluetooth so you can monitor your Relative Humidity of the return Air (Saturated heat load) I bought the blue tooth add on. Fantastic system no guess work only way to mess this system up is to not pay attention.

### ⭐⭐⭐⭐⭐ ease of use
*by F***E on July 2, 2021*

can be used in rain without failing, can be used when stored in hot and cold weather, they are not effected by the extreme, easy to set up, small compared to most brands. Only issue is the hook, not good, will pop out of socket after about a years use but this to me is small compared to the work you will get out of them, hook does not effect operation.

### ⭐⭐⭐⭐⭐ SUPERIOR QUALITY AND ACCURACY! Way better than ANYTHING the Chinese can produce!!!
*by S***F on October 30, 2020*

Awesome digital manifold set! Great German quality!!! The included calibration certificate for the manifold and the one for the vacuum sensor further add to the validity of this unit. I sent it to an independent lab upon receiving it and they arrived at results within .005% of what was shown on the calibration certificates included with the set. In short, this set beats the stuffing out of ANYTHING the Chinese try to produce.

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**Shop now:** [https://www.desertcart.mx/products/28255978-testo-557](https://www.desertcart.mx/products/28255978-testo-557)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-22*