The Testo 805i Smart Probe is your go-to infrared thermometer for quick, non-contact temperature checks. Perfect for electricians and HVAC techs needing to scan breakers, motors, ductwork, and registers without getting too close.

Out on a dusty rooftop in Australian summer, you don't always want to be up close and personal with hot equipment. This probe lets you keep your distance while still getting accurate readings, logging it all via your smartphone.

Best For

• HVAC service and maintenance teams
• Electricians checking switchboards and motors
• Building commissioning and diagnostic work
• Competent DIY owners maintaining home systems

Compatibility

This probe connects wirelessly to your smart device via Bluetooth. You'll need the free Testo Smart App, which runs on iOS 13.0 or newer or Android 8.0 or newer. Make sure your device has Bluetooth 4.2 enabled for a stable connection.

If you're running a different model, check fittings and specs before ordering.

Features

• Non-contact infrared temperature measurement for quick scans.
• Circular laser pattern indicates the exact measurement area (10:1 optic ratio) for confident targeting.
• Seamless integration with the Testo Smart App for live data, logging, and professional reporting.
• Capture photos of objects with superimposed temperature readings and the laser pattern directly in the app.
• Easily adjust emissivity settings within the app to suit various surface types for improved accuracy.
• Up to 30 hours of continuous operation on 3x AAA batteries.

Technical Specifications

What's in the Box

• Testo 805i Bluetooth infrared thermometer
• 3 x AAA batteries
• Certificate of conformity

Using It on the Job

1. Unpack the probe and insert the supplied AAA batteries.
2. Download and install the free Testo Smart App onto your compatible iOS or Android smart device.
3. Power on the Testo 805i and pair it with your smart device via Bluetooth, following the app's prompts.
4. Point the probe at the surface you need to measure. Use the clear circular laser pattern to confirm your exact target area.
5. Read the real-time temperature on your smart device. Adjust emissivity in the app if necessary for different materials, and then log or photograph the reading for your job report.
6. After use, power off the probe and store it safely, perhaps in a Testo Smart Case (Climate), to protect it from knocks and dust.

Limitations & Safety Notes

• This tool is for industrial temperature measurement, not for human body temperature.
• Ensure a clear line of sight to the target; dust, steam, or moisture can affect infrared reading accuracy.
• Always follow general site safety procedures when working around electrical or mechanical equipment.
• The laser is for targeting only; avoid directing the laser beam into eyes.
• Only compatible with mobile devices running iOS 13.0 or newer or Android 8.0 or newer, and Bluetooth 4.2.

Tradie Pro Tip

When you're checking ductwork, especially for airflow or stratification issues, a good IR thermometer like the 805i can quickly highlight hot or cold spots from a distance. This saves you time without needing to climb right into the plenum every time.

Pair With

Pair with other Testo Smart Probes like the Testo 405i hot wire anemometer or the Testo 410i vane anemometer for a complete airflow and temperature diagnostic kit. For organised storage, consider a Testo Smart Case (Climate) to keep your gear protected.