Technical Specification Sheet Document No. 149-920 August 24, 2016 Siemens Industry, Inc. Page 1 of 2 Outdoor Temperature Sensors Metal Plastic (RTD/Thermistor) Plastic (0 to 10V/4 to 20 mA) Description Siemens Outdoor Temperature Sensors monitor and transmit changes in temperature to the HVAC control system. The sensor resistance varies proportionally to the actual temperature being measured. Units are offered in traditional metal housing as well as modern and aesthetically pleasing polycarbonate housings that blend into today’s architectural trends. All are ruggedly designed and built for years of weatherproof, outdoor service. Multiple output signals are available to ensure compatibility with most common HVAC control systems. Features Variety of sensing elements. Responsive to temperature changes. Accurate and reliable indication of temperature. Easy installation requires no special tools. Specifications Output Signals 100K Ω Thermistor 10K Ω Type 2 Thermistor 10K Ω Type 3 Thermistor 1K Ω @ 32°F Ni RTD 1K Ω @ 70°F Ni RTD 1K Ω Pt RTD (375a) 1K Ω Pt RTD (385a) 4 to 20 mA Accuracy See Table 1. Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. © 2016 Siemens Industry, Inc. Siemens Industry, Inc. Building Technologies Division 1000 Deerfield Parkway Buffalo Grove, IL 60089-4513 USA Tel. +1-847-215-1000 Your feedback is important to us. If you have comments about this document, please send them to SBT_technical.editor.us.sbt@siemens.com Document No. 149-920 Printed in the USA Page 2 of 2 Table 1. Product Ordering Information. Housing Material Output Signal Measuring Range Accuracy Product Number Metal 100K Ω Thermistor -40°F to 150°F (-40°C to 65°C) ±0.50°F (±0.28°C) @ 77°F (25°C) 536-778 10K Ω Type II Thermistor ±0.4°F (±0.2°C) @ 77°F (25°C) QAC2030U 10K Ω Type III Thermistor QAC2032U 1K Ω @ 32°F Ni RTD ±0.72°F (±0.4°C) @ 32°F (0°C) QAC2020U 1K Ω @ 70°F Ni RTD QAC2021U 1K Ω Pt RTD (375a) ±0.54°F (±0.3°C) @ 32°F (0°C) 544-578 1K Ω Pt RTD (385a) QAC2012U 4 to 20 mA -58°F to 122°F (-50°C to 50°C) 536-768 Polycarbonate 0 to 10V ±1.6°F (±0.89°C) QAC3161 10K Ω Type II Thermistor −40°F to 158°F (−40 to 70°C) ± 0.81°F (±0.45°C) @ 77°F (25°C) QAC2030 1K Ω @ 32°F Ni RTD –58°F to 158°F (–50°C to 70°C) ± 0.36°F (±0.2°C) @ 32°F (0°C) QAC22 1K Ω Pt RTD (385a) −40 to 158°F (−40 to 70°C) ± 0.54°F (0.3°C) @ 32°F (0°C) QAC2012 4 to 20 mA -58° to 122°F (-50° to 50°C) ±1.6°F (±0.9°C) QAC3171 Next >