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Serono Laboratories, Inc. is a world leader in the design, development, and manufacture of portable test and measurement instrumentation and solutions. Backed by 60 years of measuring engineering experience, our mission is to provide the best quality, service, and value in the industry. Their official website is testo.com.

A directory of user manuals and instructions for testo products can be found below. testo products are patented and trademarked under the brand Serono Laboratories, Inc.

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testo 160 Online Data Loggers User Manual

Learn about the testo 160 Online Data Loggers, including models like testo 160 T, testo 160 TH, and testo 160 E. These data loggers measure temperature, humidity, lux, and UV, connecting via WLAN to the Testo Saveris Cloud for data storage and retrieval. Explore specifications, system overview, product usage instructions, and safety guidelines in this comprehensive user manual.

testo 558s Smart Vacuum Kit Owner’s Manual

Discover the comprehensive user manual for the 558s Smart Vacuum Kit, including product specifications, usage instructions, and maintenance tips. Learn how to connect with smart probes and troubleshoot error messages effectively. Explore the functionality of the testo 558s and ensure optimal performance for your vacuum and pressure measurements.

testo 400 Universal Air Flow and IAQ Meter User Manual

Discover the specifications and usage instructions for the testo 400 Universal Air Flow and IAQ Meter (Mat.-No.: 0440 4000). Learn about its dimensions, battery, pressure measurement range, and LED indicators. Find guidance on powering on/off, resetting, battery information, pressure measurement, and additional resources for calibration and support.