Review on HOWHI Manifold Diagnose Refrigerant Charging by Tony Basler

These sensors are high quality just as I expected! Works very well, is hermetically sealed and will not enter the system during testing. I can control both the high and low pressure so I can put the right amount (correct working pressure) back into the system. Has worked great diagnosing cars with air conditioning issues 6-7 times. It is intended for professional all-day use or for those who want to repair their air conditioner. Highly recommended.