Siemens 535-490-18 RIGID AVERAGING DUCT SENSOR, 20 TO 120 DEG F, 18-INCHSiemens 535 490 18 Rigid Averaging Duct Sensor, 20 to 120 Deg F, 18 InchRigid Averaging Duct Sensor with a 100 ohm platinum RTD sensing element. Temperature range is 20 to 120 degrees Fahrenheit ( 7 to 49 degrees Celsius). This unit has an 18 Inch (46 cm) probe. Additional Information Measuring range, temperature 749 C Sensing element100 ohm Platinum RTD Operating voltage18 to 36Vdc or 24Vac 20 % Analog outputs4 to 20 mA Measuring range20 to 120 F
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