Chronic pain affects 25% of adults in the United States. The key to improving chronic pain management may be found by identifying a patient’s unique pain mechanisms, but there is limited testing available to achieve this. Studies have found a patient’s response to a chronic centralized pain phenomenon known as the thermal grill illusion (TGI) may provide insight on pain mechanisms. However, there are no clinically suitable prototypes capable of producing the TGI. To solve this problem, we created a device that produces the TGI for a temperature range of 5°C to 50°C using thermoelectric devices and temperature sensors within a feedback control system; the device also measures a patient’s contact time using force sensors. It is small, portable, time efficient, cost efficient, simple to setup, easy to operate, and accurate. Therefore, it provides a viable method for measuring chronic pain in a clinic to optimize therapy and treatment options.