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HVAC
Balometers

Testo 420 Balometer Flow Hood Review

By:
Brady
•
13 August 2026

Hello everyone. Today we're going to take a look at an exciting new Testo testing device, the Testo 420 Balometer Flow Hood with Portable Soft Case. Testo has recently begun creating high-tech wireless-enabled devices that take much of the time, and nearly all the guesswork, out of HVAC work and this balancing instrument is leading the pack with innovative, lightweight design and a wide range of great new features.

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Testo 420 Balometer Capture Hood for Air Flow Balancing

Testo 770-3 Hook-Clamp Power Meter with Bluetooth/App Review

By Max | 10:23 AM MST, Thu April 20, 2017

The Testo 770-3 Hook-Clamp Power Meter is a very unique hook style clamp meter that has many different features that help separate it from the traditional clamp meters you usually see on the market. The Testo 770-3’s most prominent characteristic is how exactly its hook retracts. The problem with traditional clamp meters is the hook opens outwards making it harder to use in tight spaces and increases the difficulty of grabbing onto wires.

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testo 770-3 review
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testo 770-3 trms clamp meter
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testo 770 clamp meter
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testo 770-3 hook clamp meter review
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Testo 760-1/760-2/760-3 Digital Multimeters with New Auto Range Detection Technology Reviews

By Sam | 11:35 AM MST, Tue October 04, 2016

     Hello, this week we will be discussing two new offerings from Testo. The first is the Testo 760 Digital Multimeter and the second will be the Testo 770 Hook-Clamp Digital Multimeter. Electrical test meters are a new market for Testo but it makes sense why they have decided to enter it; to meet the specific needs of the HVAC technicians who are using their other products.

Testo 760
Testo 760 TRMS Digital Multimeter
Testo 760 Multimeter
Testo Digital Multimeter
Testo multimeter
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Testo 330i Combustion Analyzer with Bluetooth Review

By Max | 11:53 AM MST, Fri August 26, 2016

The Testo 330i Combustion Analyzer is a truly unique combustion analyzer because it does not follow your typical combustion analyzer design. The Testo 330i surprisingly has no screen, but instead focuses purely on Bluetooth communication with your smartphone or tablet device. The Testo 330i has already been on the market in Europe for over a year, and due to its success, Testo decided to bring it to North America as well.

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testo 330i wireless combustion analyzer
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testo 330i bluetooth flue gas analyzer
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testo 330i wireless combustion gas analyzer
testo 330i bluetooth combustion gas analzyer
Testo Combustion Analyzer
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Testo 330-1G LL - Review - This Combustion Analyzer has more features for more jobs

By Max | 10:15 AM MST, Tue September 29, 2015

Today I am reviewing the 330-1G LL Combustion Analyzer with Color Graphics from Testo. The Testo 330-1G LL is designed to measure O2, CO, (NOx option), draft & temperature (ambient & flue) in addition to calculations of CO2, efficiency, excess air, and CO air free.

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Testo Combustion Analyzer
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Testo 435-2 HVAC Ventilation System Analyzer Review

By:
Sam
•
22 August 2024

Today I will be reviewing Testo 435-2 HVAC Ventilation Analyzer. This meter is designed to be used for measuring room climates, inspecting and maintaining vent and air conditioning installations, and assessing the quality of room air. There are many options to choose from for the base model of Testo 435. This particular analyzer is a customizable handheld meter that can store up to 10,000 measurements and comes with PC software for report creation and analysis. Since this is a customizable meter, the unit does not come standard with a probe as there are a plethora of probes to fit your specific needs. This allows Testo to focus on the main meter itself to give it superior quality.

This quality is seen in not only the look and feel of the instrument, but also in the ease of operation. The Testo 435-2 is ruggedly built with a combination of ABS, TPE, and Metal components and has an IP54 protection class. The feel is also very ergonomic and weighs in at just under 1lb, striking a great balance between being too heavy or too light. The menu system is great as well and has preprogrammed profiles depending on what measurements you are taking. These preprogrammed settings influence what is displayed on screen, the assignment of the function buttons and also changes the structure of the menu making it more intuitive. While the unit is slender and sleek the display does a great job of maximizing its space. The screen is backlit with the light blue Testo normally defaults too. The LCD is very easy to read with the readings being large.

Testo does offer a kit for this version - Testo 435-2 (400563 4356). This kit comes with the 435-2 Unit as well as the 0632 1535 IAQ Probe, 0635 1025 Hot Wire Anemometer Probe, and a carrying case. The IAQ Probe measures CO2 (0 – 10,000 ppm), Humidity (0-100%), Temperature (0-122 F), and Pressure (+600 - +1150 hPa) while the Anemometer probe will give you a measurement for Temperature (-4 – 158 F) and Air Velocity (0-20 m/s).

When it comes to HVAC and Air Quality what parameters are most important to you?

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Testo 550 Digital Manifold with Bluetooth 0563 1550 Review

By:
Brady
•
15 August 2026

Greetings all. Today we’re going to take a look at the new and improved Testo 550 Digital Manifold with Bluetooth that retains the excellent features of the old version 550 but now includes wireless connectivity and comes at a reduced price. This new version of the 550 is a great deal for customers that want to get into digital manifolds and improves upon the old model in nearly every way.

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Testo 550 Digital Manifold with Bluetooth 0563 1550

Testo 316-3 Refrigerant Leak Detector Review

By:
Brady
•
15 August 2026

Greetings everyone. Today’s post will take a quick but detailed look at the Testo 316-3 Refrigerant Leak Detector which offers all the quality and features one has come to expect from a Testo product along with a couple unique qualities like great accuracy and superior sensitivity.

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Testo 316-3 Refrigerant Leak Detector

Testo 320 Combustion Analyzer Review – Accurate Results, NOx Filters and more

By:
Sam
•
15 August 2026

Combustion testing is an important part of many heating contractors businesses. Having an instrument that they are confident in and can trust is very important. Testo is one of the leading brands when it comes to combustion analysis. The Testo 320 Combustion Analyzer is the premier residential combustion analyzer that they offer and it has many features that are important to technicians.

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Testo 320 Combustion Analyzer
Testo
HVAC
Combustion Analyzer

Testo 310, 320, 330 Combustion Analyzers Review

By:
Brady
•
18 August 2026

Updated June 2024

Testo 320 - discontinued

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Testo 310, 320, 330 Combustion Analyzers
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