Penelitian ini bertujuan menganalisis pengaruh tekanan panasterhadap fisiologis dan psikologis pekerja di PT XYZ Tahun 2016. Unitusaha utama PT XYZ yakni part otomotif dengan kegiatan press & welding.Respon fisiologis pekerja welding terhadap tekanan panas yakni peningkatansuhu, denyut nadi dan perubahan nilai berat jenis urine. Nilai Indeks tekananpanas dengan ISBB melebihi nilai ambang. Nilai Indeks Thermal Work Limitberada pada area tidak berbahaya. Analisis data dengan uji t dependent danindependent, didapatkan nilai p < 0,005. Keluhan subyektif pekerja weldingsebagai respon psikologis. Yakni adanya rasa haus, kulit berkeringat/lembab,adanya biang keringat, kejang/kram otot selaras dengan hasil pengukuranyakni adanya peningkatan denyut nadi, suhu dan berat jenis urin.

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This study aimed to analyze the effect of heat stress on thephysiological and psychological workers at PT XYZ Year 2016. The businessunit of PT XYZ namely automotive parts with the activities of the press andwelding. Welding worker's physiological response to heat stress that anincrease in temperature, pulse and urine specific gravity value changes. Heatstress index value with WBGT exceeds the threshold value. Thermal WorkLimit Value Index is in the area is not dangerous. Data were analyzed bydependent and independent t test, p value < 0.005. Subjective complaints ofworkers welding as a psychological response. Namely their thirst, skin sweat/ moisture, their prickly heat, cramps / muscle cramps in tune with themeasurement results to an increase in pulse rate, temperature and specificgravity of urine.