testo 300 / 300 LL NEXT LEVEL
July 2026 manualInstruments 0633 3002 / 0633 3004
Manual 0970 3010 en 15, July 2026. Check the full device identification and controls against this edition.
Testo device manuals
Operating manuals for the Testo instruments QRM customers use most often.
Match the exact model. Check the nameplate, product number and generation. 310 and 310 II, 557 and 557s, and the two generations of 535 use different manuals. English PDFs open on Testo’s website; use your browser’s download button to save them.
20 manual entries
No matching results
Try a shorter model number or choose All topics. You can also browse the manuals or ask QRM to assess the device.
Next-Gen testo 300
Next-Gen editionNext-Gen 300 family — manual 0970 3010 en 07
This is the source edition for the illustrated 300 condensate and modular-probe filter guides.
testo 300 / 300LL — earlier editions
Find exact editionOlder 300-family instruments
Use the exact product number to identify the matching manual. Do not assume a Next-Gen or NEXT LEVEL edition applies.
testo 310
First generationOriginal testo 310
Choose this manual for the original instrument; the 310 II has a separate entry.
testo 310 II / 310 (2nd Gen)
Second generationInstruments 0632 3104 / 0632 3106
Manual 0970 3102 en 08, June 2025; source for the 310 II walkthroughs.
testo 320
320 editionStandard testo 320
Check the product number and regional version. A 320 basic or newer reused model name may need a different edition.
testo 330-1 / 330-2 LL or LX
Find exact editionFull model suffix and product number required
Search Testo’s manual finder for your exact 330 variant. Do not substitute 330i or another generation.
testo 330G
Find exact editionConfirm 330G on instrument label
Use the full product number in Testo’s manual finder; contact QRM if the correct regional edition is unavailable.
testo 327-1
Find exact editionConfirm 327-1 and product number
Use the manufacturer’s manual finder to identify the matching legacy operating instructions.
testo 340
340 editionIndustrial flue gas analyser
Confirm the installed sensor configuration and matching accessories in the manual.
testo 350
350 edition — check generationControl unit / analyser box
Confirm both the control unit and analyser-box generation. Older versions may require a different manual.
testo 549 / testo 550
549 / 550 BT manualOriginal 549 and Bluetooth-era 550
Match the manual cover and product number. This is separate from the 550s and 550i.
testo 557
557 editionOriginal testo 557
Check the product generation and vacuum-probe arrangement; the 557s has a separate manual.
testo 550s / testo 557s
Smart manifoldsCombined 550s / 557s manual
Source for battery and Bluetooth walkthroughs. Not the original 550/557 or the 550i.
testo 570
Original 570570-1 / 570-2 kit family
Use the 570s entry for the newer smart-manifold generation.
testo 570s
Smart manifold570s family
Operating instructions for the smart manifold; match the named probes and accessories.
testo 435-1 / -2 / -3 / -4
435 familyMultifunction climate instruments
One family manual; available functions and probe compatibility depend on the variant.
testo 535 — legacy
Find exact editionOlder 535; confirm product number
Use Testo’s manual finder for the older instrument. The app-connected 535 manual below is a different generation.
testo 535 — app-connected
App-connected generationDevice 0560 0535 01; kit 0563 0535 01
US English operating manual. Source for the CO₂ reading walkthrough.
Testo Smart Probes
New-generation manualCheck each probe’s model number
Covers the models named on the manual cover; confirm your exact probe and generation.
Another Testo model or language?
Search the full manufacturer catalogue using the product number on your instrument. If the pictured instrument or controls differ, ask QRM to help identify the correct edition.
Open Testo’s manual finder ↗Links checked 7 September 2026. Sources, editions and link help.
Still need help with your device?
Include the model, serial number, exact error and checks already completed.