The compact Testo 510 Draught Guage, which comes with a silicone connection hose and other useful accessories, helps heating engineers measure static gas and gas flow pressure to help them diagnose problems with ventilation systems.
The Stainless Steel Test Kit contains everything you need to test straight from the box so you can start taking measurements straightaway. 
Main Features:
A compact design that is easy to operate with just 3 buttons. 
Differential pressure measurements from 0 to 100 hPa. 
Magnets on the rear that allow you to work hands-free. 
An illuminated display makes working in areas with poor visibility easy. 
10 units to choose from including pascals. 
The Stainless Steel Test Kit contains everything you need to test straight from the box so you can start taking measurements straightaway. I
Included in the box: 
Differential Pressure Meter 
Protection Cap 
Belt Holder 
2 x Connection Hoses 
Wrist Strap
Calibration Protocol