Home Based Monitoring for Smart Health-Care Systems: A Survey

Table 1

Comparison of various temperature sensors [6].

Temp. Sensor type	Temp. Range	Advantages	Disadvantages
RTD Sensors [6]	-196°C +850°C	(i) Incredibly accurate; (ii) Stable; (iii) Reliability; (iv) Consistent; (v) High temperature ranges	(i) Costly; (ii) Less robust than thermocouple; (iii) Requires a constant power supply
Thermocouples [7]	95°C–1260°C	(i) Wide temperature range; (ii) Highly rugged; (iii) Best for high temperatures	(i) Nonlinear; (ii) Low voltage; (iii) Least stable
NTC Thermistors [8]	-40°C to 125°C	(i) Extremely sensitive; (ii) Ideal for tiny temperature variations; (iii) Simple to use; (iv) Quick reaction; (v) Standard two-wire interface	(i) Fragile; (ii) Current source required; (iii) Self-heating; (iv) Limited temperature range; (v) Nonlinear
IR sensors [9]	-20 to 350°C	(i) Hand-held and simple to use; (ii) Highly precise and accurate; (iii) Fast reaction time; (vi) No need to touch with target item	(i) Debris, pollutants, and blackbody radiation all have a negative impact on accuracy