Professional HVACR Measuring Equipment You Can Trust
Accurate, Easy-to-Use Instruments for HVAC and Refrigeration Technicians

Looking for dependable HVACR measuring instruments that make your job easier?

Our HVACR Measuring Equipment Range is designed for simplicity, accuracy, and efficiency—so you can work faster and smarter.


Why Choose Our HVACR Measuring Tools?

Our collection features six precision instruments specifically engineered for HVAC and refrigeration system diagnostics. Whether you're checking airflow, temperature, pressure, or humidity, our tools provide reliable readings every time.


Our HVACR Instrument Range Includes:

  • Si-TT3 Dual Input Thermometer
    Simultaneously measure two temperature points with high precision.
  • Si-TI3 Infrared Thermometer
    Non-contact surface temperature readings—ideal for quick checks and safety.
  • Si-HH3 Thermo-Hygrometer
    Measure ambient temperature and humidity with accuracy.
  • Si-PM3 Digital Differential Pressure Manometer
    Perfect for testing air filters, duct pressure, and ventilation performance.
  • Si-VV3 Vane Thermo-Anemometer
    Ideal for measuring air velocity and temperature in ducts and HVAC systems.
  • Si-VH3 Hotwire Thermo-Anemometer
    High-sensitivity airflow and temperature readings for low-velocity applications.


Work Smarter with the Mobile App

Sync your measurements directly to your smartphone. Generate detailed reports on-site and share results instantly—no paperwork needed.


Built for HVAC Professionals

Whether you're performing routine maintenance or troubleshooting complex systems, our HVACR measuring tools deliver the performance and reliability you need.



Explore the range today and take the guesswork out of HVAC diagnostics.


hvac dual and infrared thermometer, thermo hygrometer, pressure manometer, vane thermo anemometer /hotwiere thermo anemometer

Key Features:

  • User-friendly design for fast, intuitive operation
  • Bright backlit display for visibility in low-light environments
  • Magnetic backing for hands-free use on metal surfaces
  • Bluetooth connectivity to sync data with our mobile app
  • Long battery life for extended field use
  • Auto-generated reports directly on your smartphone or tablet


Digital differential pressure meter manometer for air velocity and airflow

Si-PM3 Digital Differential Pressure Manometer

The Si-PM3 Digital Differential Pressure Manometer is a versatile and accurate tool for measuring differential pressure in HVAC systems, with a wide range from -150 to 150 hPa (-60 to 60 inH₂O). Designed for professional use, it offers up to 170 hours of battery life, ensuring dependable performance in the field. When paired with a Pitot tube (optional), it can also calculate air velocity and airflow, making it ideal for duct and ventilation testing. The Si-PM3 comes with two K-type thermocouple probes, adding extra functionality for simultaneous temperature measurement. Perfect for HVAC technicians seeking a reliable, multi-function digital manometer.

Click for full details on the Si-PM3 Digital Differential Pressure Manometer