Dwyer 659TH-1 is a push-button temperature transmitter designed for ambient temperatures ranging from -4 to 158°F (-20 to 70°C) with a maximum 80% RH. It offers high accuracy with ±0.04% full scale for T/C models, ±0.2°C or ±0.1% of reading for RTD models, and ±0.25°F (±0.1°C) for thermistors. The linearized 4 to 20 mA output is loop powered, and the loop resistance is 700 Ω for T/C, 800 Ω for RTD, and 24 VDC for thermistors. The input range is extensive, covering various temperature ranges for different types of sensors, including T/C, RTD, and thermistors. With zero thermal drift of 0.2µA/°C and span thermal drift of 0.5µA/°C, accurate readings are maintained. Burnout protection is provided with upscale 22 mA. The sample rate is 500 ms, ensuring fast and reliable temperature measurements.