Description Overview 7 inch HMI touch screen makes parameter setting and operation easy and convenient for heat seal tester. PLC control and 7 inch touch screen operation. Five groups sealing temperature can be measured with one test. Proximity and pressure sensor for precise dwell time and sealing pressure control. P.I.D. temperature control. Foot pedal equipped. Uniform heating by aluminum encapsulated sealing jaws. Independent heating of upper and lower sealing jaws. Sealing jaws customization available. RS 232 port with professional software (optional).