The H-Frame adjustable electromagnet has a magnetic field air gap adjustable bidirectionally and a double yoke structure that forms a closed magnetic circuit with good rigidity. The yoke is inclined at an angle of 45 degrees to facilitate the taking and placing of samples and other equipment.The H-frame adjustable electromagnet has a horizontal magnetic field direction. H-Frame adjustable electromagnets have a wide range of air gap adjustment and feature easy pole replacement. They are suitable for Hall effect research, magnetoresistance effect research, hysteresis retraction studies, torque magnetometers, force method magnetometers, vibration sample magnetometers, etc. In addition, H-frame adjustable electromagnets are also capable magnetic susceptibility and magnetic material measuring devices.