Abstract: An explosion-proof dust of electromechanical level measuring device includes: a explosion proof enclosure (100), formed with a safe chamber area (101) and a hazardous chamber area (102) and a power shaft sleeve (120) is provided for communicating the above two; a power unit (200) disposed inside the safe chamber area (101); a control module (300) disposed inside the safe chamber area (101) and electrically connected to the power unit (200); a capstan (400) disposed in the hazardous chamber area (102); a power shaft (500) sleeved in the power shaft sleeve (120) and two ends thereof are respectively connected to the power unit (200) and the capstan (400); and a pair of bearings (610, 620) disposed in the power shaft (120) and spaced with an interval thereby forming a fireproof path (601).

Abstract: An explosion-proof dust of electromechanical level measuring device includes: a explosion proof enclosure (100), formed with a safe chamber area (101) and a hazardous chamber area (102) and a power shaft sleeve (120) is provided for communicating the above two; a power unit (200) disposed inside the safe chamber area (101); a control module (300) disposed inside the safe chamber area (101) and electrically connected to the power unit (200); a capstan (400) disposed in the hazardous chamber area (102); a power shaft (500) sleeved in the power shaft sleeve (120) and two ends thereof are respectively connected to the power unit (200) and the capstan (400); and a pair of bearings (610, 620) disposed in the power shaft (120) and spaced with an interval thereby forming a fireproof path (601).

Abstract: A thermal mass flow meter includes a housing, a control module, a plurality of probes, a flow calculation circuit, and a heating module. The control module is installed in a containing space. The probes are connected to one terminal of the housing. The flow calculation circuit is connected to the control module, and has a plurality of circuit boards installed in the probes and a plurality of temperature sensing units connected to the circuit boards. The heating module is connected on one of the circuit boards, and connected to the control module. The control module controls the heating module to heat a working fluid in a pipeline; the flow calculation circuit senses the temperature inside the pipeline to acquire temperature change values, and transmits the temperature change values to the control module; and the control module measures the fluid velocity of the working fluid.