Testo 557 Digital Refrigeration Gauge with Vacuum Probe – 0563 1557
The Testo 557 is a Bluetooth-enabled digital 4-way manifold built for commissioning, service and maintenance on refrigeration systems and heat pumps. It combines pressure and temperature measurement, real-time superheat and subcooling, and precise external vacuum measurement in one field-ready kit.
Compare it with our full refrigerant gauges range, browse the wider Testo collection, or contact the team via our support page if you need help choosing the right digital manifold for your workflow.
Quick summary
The Testo 557 suits HVAC-R technicians who want faster commissioning, evacuation and service diagnostics without juggling separate gauges, temperature probes and a standalone micron gauge.
Best for
- Refrigeration and air conditioning service technicians
- Heat pump commissioning and maintenance
- Techs who want app-based reporting and refrigerant updates
- Workflows where accurate vacuum measurement matters during evacuation
Why tradies choose the Testo 557
- 4-way digital manifold: built for faster, cleaner service and charging workflows.
- External Pirani vacuum probe: gives more precise vacuum measurement during evacuation than relying on a rough gauge estimate.
- Real-time superheat and subcooling: calculated automatically using the included clamp probes.
- Bluetooth app connection: monitor readings, save results and generate documentation on site.
- Heat pump mode: helps reduce hose swapping during reversible-system work.
- Refrigerant library with updates via app: keeps the instrument more useful as refrigerant choices evolve.
Key specs
| Brand | Testo |
| Model | 557 |
| Part number | 0563 1557 |
| Type | Bluetooth digital 4-way manifold |
| Pressure range | -1 to 60 bar |
| Pressure accuracy | ±0.5% fs |
| Temperature range | -50 to +150 °C |
| Temperature accuracy | ±0.5 °C |
| Vacuum range | 0 to 20,000 micron |
| Connections | 3 x 7/16" UNF + 1 x 5/8" UNF |
| Battery life | Up to 250 hours |
| Operating temperature | -20 to +50 °C |
| Protection class | IP42 |
| Dimensions | 220 x 125 x 70 mm |
| Weight | 1200 g |
Compatibility and setup notes
The Testo 557 is designed for refrigeration systems and heat pumps where accurate pressure, temperature and evacuation data are important. It is a strong fit for technicians who want one instrument for commissioning, service and maintenance rather than switching between separate gauges and vacuum tools.
For better evacuation performance, pair it with a suitable vacuum pump and quality refrigerant hoses. If you also charge by weight regularly, a dedicated refrigerant scale is still recommended.
What’s included
- Testo 557 digital manifold
- 2 x clamp temperature probes
- External vacuum probe
- Batteries
- Carry case
- Calibration certificate
What you may also need
- Refrigerant hoses – for charging, testing and evacuation setups.
- Vacuum pumps – to build a faster, more reliable evacuation workflow.
- Refrigerant scales – for accurate charging and recovery by weight.
- Testo 557 compliance and logging guide – practical AU context for reporting and documentation workflows.
Official references
- Testo 557 official product page
- Testo 557 official data sheet
- ARCtick refrigerant handling licence information
- ACCC consumer guarantees guidance
Frequently asked questions
Is the Testo 557 suitable for heat pumps as well as refrigeration systems?
Yes. Testo positions the 557 for commissioning and maintenance on refrigeration systems and heat pumps, and its automatic heat pump mode is useful on reversible systems.
Does the Testo 557 include a vacuum probe?
Yes. This set includes an external vacuum probe for precise vacuum measurement during evacuation.
Can I generate reports from the Testo 557?
Yes. The Bluetooth connection to the Testo Smart App allows monitoring, saving and documenting measurements on a smartphone or tablet.
Does this replace a refrigerant scale?
No. The 557 is excellent for pressure, temperature, vacuum and calculated values like superheat and subcooling, but charging by weight still calls for a dedicated refrigerant scale.
How many refrigerants are stored in the instrument?
The instrument stores 60 common refrigerants, and updates can be made via the app.
Is this a DIY tool?
It is a professional HVAC-R instrument. Work that involves refrigerant handling or service on RAC equipment in Australia requires the appropriate licence and should be carried out by competent, properly authorised persons.
Why buy from HVACShop?
- Australian support: Phone support is available Mon–Fri, 9:00am–5:00pm AEST on 0412 333 115.
- Email support: support@hvacshop.com.au
- Shipping carriers: Australia Post, TNT, Hunter Express and Toll Priority, depending on item and location.
- Dispatch and delivery: In-stock orders are generally shipped within a few business days; metro deliveries are usually quicker than regional or remote areas.
- Returns and warranty: HVACShop states products are backed by manufacturer warranty, with faulty items assessed on inspection. See Shipping & Returns.
- Secure payments: Amex, Apple Pay, Google Pay, Mastercard, PayPal, Shop Pay, UnionPay and Visa.
- Compliance note: Refrigerant handling and certain RAC work in Australia requires the appropriate ARCtick licensing.
- ABN: 98 351 143 900 – verify via ABN Lookup.
Author: HVACShop Content Team
Reviewer: Licensed refrigeration & air-conditioning technician (ARCtick)
Last updated: 2026-03-09 AEST