Keystone Instruments

Keystone Instruments Keystone Instruments Corporation is the authorized distributor and service center for Testo measuring device

16/04/2026

Quick. Precise. Effortless outlet measurements.
With the testo 440, HVAC pros measure volume flow at air outlets with ease – guided menus and versatile probes ensure accurate results in no time.

👉 Simplify your airflow checks today.

For inquiry, you may message us on facebook or call us at (02)
8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

31/03/2026

One instrument. All IAQ parameters.

The testo 400 is the universal solution for climate and IAQ experts – precise measurements, smart assistants, and complete documentation on site.

👉 Discover your perfect partner for every IAQ job.

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

Essential in pharmaceutical and laboratory environments: When it comes to complete quality assurance and compliance, The...
27/03/2026

Essential in pharmaceutical and laboratory environments: When it comes to complete quality assurance and compliance, The new esto 162 wifi data loggers series are the perfect solution. They are: 100% reliable. 100% convenient. And 100% efficiency-boosting. 🔒 💯

How does that work? With the clever interaction of smart online data loggers, testo Saveris Cloud and testo Smart App. Monitoring, documentation and alarms are all automated. Achieving compliance has never been easier! 💡

Check out the functions here!👇🏼
https://keystone-instruments.com/the-new-testo-16x.../

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

26/03/2026

Find hidden energy losses before they become costly!

The testo 883-2 delivers sharp thermal images, flexible lens options and full connectivity – the perfect companion for professional building thermography.

✅ Detect every thermal bridge and weak spot
✅ Capture more with interchangeable wide-angle lenses
✅ Analyse and document with free IRSoft software
✅ Share results instantly via the testo Thermography App

👉 Discover the testo 883-2 for building thermography.

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

23/03/2026

Quick. Precise. Effortless outlet measurements.

With the testo 440, HVAC pros measure volume flow at air outlets with ease – guided menus and versatile probes ensure accurate results in no time.

👉 Simplify your airflow checks today.

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

22/03/2026

One manifold. Endless possibilities.

The testo 558s connects with testo Smart Probes, vacuum pumps, and scales – giving refrigeration technicians a complete system for every job.

👉 Explore the testo 558s now.

For inquiries, please call our authorized dealer: Uniform Refrigeration & AC Supply Inc. at 5310-2280/ 8733-8371 local 104/ 0917-834-0961 or send email to [email protected]"

21/03/2026

The testo 420 balometer is ideal for larger air supplies and returns and enables fast and precise testing and balancing of indoor environmental systems. It provides reliable data with precise calculations of the overall volume flow in HVAC systems. Equipped with Bluetooth all data can be saved on your smart device, and reports generated using the free testo app and sent via messaging apps.

✅ Lightweight. Quick set-up. Only 2.9kg
✅ Work efficiently with the testo 420 app
✅ Highest measurement accuracy even in turbulence
✅ Minimizes measurement errors
✅ Create and send reports directly on site
✅ Fits different outlet sizes perfectly

For inquiry, call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

The testo 860i – your go-to for fast and reliable thermal diagnostics.From quick spot checks to Delta T and mould detect...
09/03/2026

The testo 860i – your go-to for fast and reliable thermal diagnostics.

From quick spot checks to Delta T and mould detection – the testo 860i delivers sharp thermal images and seamless operation via the testo Smart App.
Ideal for fast diagnostics on the go.

✅ Compact and connected
✅ Sharp thermal images in seconds
✅ Simple reporting via the app

👉 Discover the testo 860i now

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

Spot humidity and mould risks in seconds!Thanks to the seamless connection between the testo 860i and testo 605i.Activat...
20/02/2026

Spot humidity and mould risks in seconds!

Thanks to the seamless connection between the testo 860i and testo 605i.
Activate humidity mode in the testo Smart App to visualise moisture levels directly in your thermal image for fast and reliable building assessments.

👉 Discover how connectivity makes the difference.

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

🌍 How pays off: The more precise the flue gas analysis, the more effectively you can optimize the combustion process.T...
19/02/2026

🌍 How pays off: The more precise the flue gas analysis, the more effectively you can optimize the combustion process.

The result:
✅ Lower CO₂ emissions
✅ Reduced fuel consumption
✅ Lower energy costs
✅ Reliable compliance with all emission limits

Even a 1% reduction in excess air increases efficiency by 1% – saving up to €3 million per year, depending on the plant size. 💡

With Testo 350, you can achieve efficiency, profitability, sustainability and full compliance – all in one step.

For inquiry, you may message us on facebook or call us at (02) 8831-5056/ (02) 8831-7606/ 0917-822-4194 or email us at [email protected]

Address

2130 Leveriza Street
Pasay City
1304

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm
Saturday 8am - 12pm

Telephone

+63288315056

Website

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