Testo 535 Digital CO₂ Meter (0563 0535)

— a compact, highly accurate carbon dioxide measuring instrument that lets technicians quickly verify indoor air quality, assess workplace ventilation and document results with the Testo Smart App. It measures 0–10,000 ppm CO₂ using a long-term stable infrared sensor and sounds an audible alarm on threshold breaches. No dramas—fast, accurate, and built for Australian job sites.

Key Features & Trade Benefits

• 0–10,000 ppm range — capture precise indoor air quality (IAQ) metrics accurately, so your ventilation checks hold up.
• Long-term stable NDIR sensor — highly reproducible and comparable measurement results without the need for frequent recalibration.
• Highly accurate — ensures reliable indoor climate assessments and fewer call-backs.
• Smart App workflow — configure thresholds, view trends, store readings and export PDF/CSV reports straight from site—too easy.
• Timed & point averaging — document realistic IAQ performance over time, not just snapshots.
• Audible limit alarm — set max CO₂ targets and get a beep when levels drift—saves time during audits.
• Rugged, lightweight build (IP40 instrument) — easy to carry and tough enough for daily site work.

Why This Product Matters

On a Sydney office fit-out or a school HVAC upgrade, you’re checking ventilation effectiveness. With the 535, you’ll nail the target 800–1000 ppm brief in minutes, log averages, and export a clean report before the lift hits ground. Fair dinkum time-saver. If you’re comparing options, see our Environmental Testers to build out your test kit.

Tip: Many AU regulators reference AS 1668.2 for mechanical ventilation and acceptable indoor air quality—use a reliable meter and document it properly.

Tradie Pro Tip: Keep the sensor well-exposed in the breathing zone (e.g., desk height) and avoid breathing directly onto the probe. Then, log multi-point and timed averages for each room. Name locations in the Smart App as you go—she’ll be right when the report lands.

Compatibility & System Info

• Measured gases: Ambient carbon dioxide (CO₂).
• Smart App: iOS 13+ / Android 8.0+ via Bluetooth (BLE 4.2 or higher).
• Use cases: Offices, schools, commercial buildings, healthcare, retail, and facility maintenance.

Local Jobsite Note (AU)

From stuffy meeting rooms in Melbourne to crowded retail spaces in Brisbane, poor airflow can cause sudden CO₂ spikes. Use timed averaging and the alarm to track overall ventilation performance and keep it tidy—no worries.

What’s Included

• Testo 535 Digital CO₂ Meter (0563 0535)
• Transport bag
• Calibration protocol
• 3 × AA batteries

As per datasheet delivery scope.

Instructions / Manual:

• Testo 535 Datasheet (EN, PDF)
• Testo 535 Instruction Manual (PDF)

Specifications

Verified from Testo datasheet & manual.

Warranty & Returns

Testo AU warranty: instruments 24 months (typical), accessories 12 months. Register with Testo for possible extended coverage. HVAC Shop standard returns apply.