This study proposes an SPR-based temperature sensor using E7 liquid crystal with angle interrogation. The sensor consists of a gold (Au) film and liquid crystal (LC) film. The resonance angle is analyzed to detect temperature differences between 15 and 85 °C. The results show that temperature variations cause significant fluctuations in the SPR sensor's values, highlighting the sensitivity of different LC types. Simulations revealed slight differences in the resonance angles of various LCs, posing challenges for their use as accurate temperature sensors. However, E7 LC showed promise as an efficient temperature sensor within the given range when 633 nm and 656 nm wavelengths were considered. The study found that LCs had different sensitivities, with the highest at 0.249 deg/°C and the lowest at 0.002 deg/°C. The results highlight the potential of SPR-based LCs, particularly E7, as reliable temperature sensors within the given temperature ranges, providing information about their possible use in temperature-sensitive settings. SPR is a label-free detection technique with high sensitivity, selectivity, and short response time, making it suitable for various applications. However, conventional thermometers have limitations in terms of contact and response time. Optical temperature sensors offer a non-contact advantage, making SPR-based sensors suitable for remote temperature sensing. SPR-based temperature sensors require a thermos-optic material, whose refractive index (RI) varies with temperature. Liquid crystals have shown excellent thermo- and electro-optic properties and are used in temperature sensing. The RI of liquid crystal depends on temperature, and any change in temperature affects the RI of the liquid crystal, which in turn affects the SPR response. The proposed sensor uses E7 liquid crystal as a temperature sensing element in the 25–85 °C range. Numerical investigations were conducted using the transfer matrix method (TMM) to improve the design parameters. The optimized parameters provide high performance in terms of figure of merit (FOM). The sensor's sensitivity, quality factor, and FOM were analyzed in relation to temperature. The proposed sensor uses a three-layer structure consisting of a prism/Au film/LC. The E7 liquid crystal film sandwiched between the BK7 glass superstrate and Au film is used as a temperature sensing element. The RI of the glass prism (BK7) is calculated using a specific formula. The RI of the Au layer is calculated using the Drude model. The proposed sensor uses liquid crystal as a transducer element for temperature sensing. The refractive indices of liquid crystal are taken from a reference. The wave vector matching condition for SPR in Kretschmann configuration is written as a specific equation. The RI at any temperature is given by a specific equation.This study proposes an SPR-based temperature sensor using E7 liquid crystal with angle interrogation. The sensor consists of a gold (Au) film and liquid crystal (LC) film. The resonance angle is analyzed to detect temperature differences between 15 and 85 °C. The results show that temperature variations cause significant fluctuations in the SPR sensor's values, highlighting the sensitivity of different LC types. Simulations revealed slight differences in the resonance angles of various LCs, posing challenges for their use as accurate temperature sensors. However, E7 LC showed promise as an efficient temperature sensor within the given range when 633 nm and 656 nm wavelengths were considered. The study found that LCs had different sensitivities, with the highest at 0.249 deg/°C and the lowest at 0.002 deg/°C. The results highlight the potential of SPR-based LCs, particularly E7, as reliable temperature sensors within the given temperature ranges, providing information about their possible use in temperature-sensitive settings. SPR is a label-free detection technique with high sensitivity, selectivity, and short response time, making it suitable for various applications. However, conventional thermometers have limitations in terms of contact and response time. Optical temperature sensors offer a non-contact advantage, making SPR-based sensors suitable for remote temperature sensing. SPR-based temperature sensors require a thermos-optic material, whose refractive index (RI) varies with temperature. Liquid crystals have shown excellent thermo- and electro-optic properties and are used in temperature sensing. The RI of liquid crystal depends on temperature, and any change in temperature affects the RI of the liquid crystal, which in turn affects the SPR response. The proposed sensor uses E7 liquid crystal as a temperature sensing element in the 25–85 °C range. Numerical investigations were conducted using the transfer matrix method (TMM) to improve the design parameters. The optimized parameters provide high performance in terms of figure of merit (FOM). The sensor's sensitivity, quality factor, and FOM were analyzed in relation to temperature. The proposed sensor uses a three-layer structure consisting of a prism/Au film/LC. The E7 liquid crystal film sandwiched between the BK7 glass superstrate and Au film is used as a temperature sensing element. The RI of the glass prism (BK7) is calculated using a specific formula. The RI of the Au layer is calculated using the Drude model. The proposed sensor uses liquid crystal as a transducer element for temperature sensing. The refractive indices of liquid crystal are taken from a reference. The wave vector matching condition for SPR in Kretschmann configuration is written as a specific equation. The RI at any temperature is given by a specific equation.