The Penile Hardness Tester is suitable for the measurement of a patient’s penile erection at night, and can also be used to induce an erection in an outpatient examination, and is generally effective. The method of using the penile hardness tester is by the doctor at about 8:30 p.m., the Holter will be placed on the patient’s abdomen to fix, the sensor cuff wrapped around the root of the penis moderately, in order to no strangulation, change the position will not be loose to fall off as appropriate. Turn on the power supply, the patient can sleep into the detection state, the next morning at 7:00 a.m. to remove the sensor and Holter, do not turn off the power supply, and then back to the results. The relevant judgment standards are as follows: 1. Normal: intensity ≥100; duration ≥10min; number of erections ≥6. 2. Mildly abnormal: intensity 80~100; duration ≥10min; number of erections ≥6. 3. Moderate abnormality: intensity 40~80; duration <10min; number of erections <6. 4. Severe abnormality: intensity <40; duration <10min; number of erections <6. If the penile erection function is abnormal, you should go to the hospital in time for hospital-related examination, and actively cooperate with the doctor’s treatment.