This external probe connects to the hot plate stirrer and allows the user to control the temperature of the solution directly. When the probe is attached to the hot plate, the temperature display will give the actual temperature of the solution and allows for solution temperature adjustments from 86 °F to 482 °F / 30 °C to 250 °C. | It is recommended to use a clamp on a support rod to hold the probe in the solution | For accurate probe measurements, ensure the probe tip is dipped, about 1", into the solution | f the temperature probe is not dipped in solution, the top plate temperature will continue to rise, up to its maximum, due to the probe sensing a constant almost ambient temperature