Amazon.com: Siemens KTP400 SIMATIC HMI Basic Touch Panel for Industrial Communication, Automation Systems and Distributed Control Systems : Industrial & Scientific
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Siemens QBM3020-1D Air Duct Differential Pressure Sensor with Display for Air & Non-Aggressive Gases (Pressure Range: 0 to 100 Pa) by Instrukart: Amazon.com: Industrial & Scientific