Testo 635-1 Temperature & Humidity Measuring Instrument
What is the Testo 635-1?
The Testo 635-1 is a professional temperature and humidity measuring instrument designed for HVAC engineers, building services technicians and environmental monitoring professionals who need accurate climate measurement across multiple applications.
Built for versatility, it measures air humidity, temperature, dew point and absolute pressure when paired with compatible probes. With support for both wired and wireless probes, it’s ideal for HVAC commissioning, indoor air quality testing, compressed air systems and industrial climate monitoring.
How does the Testo 635-1 improve measurement efficiency?
The Testo 635-1 allows technicians to connect up to two plug-in probes and receive data from up to three wireless probes, reducing setup time and improving workflow on site. Wireless capability (up to 20 m) helps avoid cable damage and simplifies measurements in hard-to-reach areas.
Advanced functions such as dew point and dew point distance calculations, along with min, max and mean value display, make it easier to analyse environmental conditions quickly and accurately. Its intuitive interface and robust IP54 design ensure reliable performance in demanding HVAC and industrial environments.
Please note: probes are required for operation and are sold separately.
Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on all orders
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
