Temperature measuring and monitoring is widely used in medical equipment and industries. In MRI equipment, there needs to be several NTC to monitor liquid-helium temperature. In a ventilator, engineers need to monitor temperature of air and make sure the temperature of air is comfortable for the patient. In a CT system, the engineer needs to monitor temperature of DAS system for get best SNR and then high imaging quality. In an IVD system, engineers also need to monitor temperature of samples. In a hospital, the doctor also needs to monitor the temperature of the patient during surgical operations since this is a key parameter of humans. There are several methods based on different principles to measure temperature. However, most medical equipment prefers to use NTC or RTD for temperature measure since high precision, easy mounting, and inexpensive. This application note shows several designs to measure or monitor temperature with sensor of NTC or RTD. The methods proposed in this application note can also be used in other industry systems.
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Temperature is an important parameter for several medical systems and industry producing. In MRI equipment, there needs to be several NTC to monitor liquid-helium temperature. In a ventilator, engineers need to monitor temperature of air and make temperature of air is comfortable for patient. In a CT system, engineer need monitor temperature of DAS system for get best SNR and then high imaging quality. In an IVD system, engineers also need to monitor temperature of samples. In hospital, doctor also need monitor temperature of patient during surgical operations since this is a key parameter of humans. There are several methods based on different principles to measure or monitor temperature. This application note mainly focuses on NTC and RTD methods. The document proposes several designs to interface with NTC and RTD since NTC and RTD is ease of mounting, inexpensive, high-sensitive, high precision and then was widely used in medical systems and industry systems.