Abstract: A gas flow meter comprises a meter body, a tube, and a sensing unit. The sensing unit includes a base connected with one end of the tube; a speed transducer penetrating the base; a temperature transducer penetrating the base; a temperature compensator penetrating the base; and a microcontroller accommodated inside the meter body. The microcontroller is electrically connected with the speed transducer, the temperature transducer and the temperature compensator. The temperature transducer only functions to detect the temperature of the surrounding gas. The temperature compensator only functions to compensate the speed transducer for the temperature drop thereof. Each of them functions independently. Once the temperature of the speed transducer lowers, the temperature compensator directly compensates for the temperature drop, whereby the statistic error value is effectively decreased.

Abstract: A gas flow meter comprises a meter body, a tube, and a sensing unit. The sensing unit includes a base connected with one end of the tube; a speed transducer penetrating the base; a temperature transducer penetrating the base; a temperature compensator penetrating the base; and a microcontroller accommodated inside the meter body. The microcontroller is electrically connected with the speed transducer, the temperature transducer and the temperature compensator. The temperature transducer only functions to detect the temperature of the surrounding gas. The temperature compensator only functions to compensate the speed transducer for the temperature drop thereof. Each of them functions independently. Once the temperature of the speed transducer lowers, the temperature compensator directly compensates for the temperature drop, whereby the statistic error value is effectively decreased.

Abstract: A flow meter regulation valve fastening structure includes a holder with one side coupled with a regulation valve by screwing. The regulation valve has a regulation shaft with a flange and a screw head located at an upper side. The screw head is coupled with an anchor member. The anchor member has a coupling plate at one end coupled on the screw head and an anchor plate at another end with two detent plates extended downwards from two sides to butt two sides of the frame edge of the holder for retaining. Thereby when the regulation valve is coupled with the holder and a pipe, the junction of the regulation valve and the holder can be prevented from generating fractures due to excessive turning forces.

Abstract: A flow meter comprises a flow tube, a magnetic switch and an adjustment assembly. The flow tube has two ends screwed respectively with a first fastening member and a second fastening member, and includes a jutting seat, a sleeve, a magnetic element and an elastic element inside. The magnetic switch is located on a lateral surface of the flow tube, and includes a magnetic induction member disposed inside to form magnetic induction with the magnetic element and a first gear rack. The adjustment assembly engages with the first gear rack for control. When the sleeve is pushed by liquid to generate displacement alteration, distance between the magnetic induction member and sleeve can be quickly adjusted by the adjustment assembly. In the event that the magnetic element in the sleeve exceeds the limit range of the magnetic induction member, a notice is sent to shut down electric power.

Abstract: A flow meter comprises a flow tube, a magnetic switch and an adjustment assembly. The flow tube has two ends screwed respectively with a first fastening member and a second fastening member, and includes a jutting seat, a sleeve, a magnetic element and an elastic element inside. The magnetic switch is located on a lateral surface of the flow tube, and includes a magnetic induction member disposed inside to form magnetic induction with the magnetic element and a first gear rack. The adjustment assembly engages with the first gear rack for control. When the sleeve is pushed by liquid to generate displacement alteration, distance between the magnetic induction member and sleeve can be quickly adjusted by the adjustment assembly. In the event that the magnetic element in the sleeve exceeds the limit range of the magnetic induction member, a notice is sent to shut down electric power.

Abstract: A flow meter regulation valve fastening structure includes a holder with one side coupled with a regulation valve by screwing. The regulation valve has a regulation shaft with a flange and a screw head located at an upper side. The screw head is coupled with an anchor member. The anchor member has a coupling plate at one end coupled on the screw head and an anchor plate at another end with two detent plates extended downwards from two sides to butt two sides of the frame edge of the holder for retaining. Thereby when the regulation valve is coupled with the holder and a pipe, the junction of the regulation valve and the holder can be prevented from generating fractures due to excessive turning forces.

Abstract: A fluid visual inspection device includes a fluid visual inspection portion and one set of fastening caps. The fluid visual inspection portion includes a vane holder which has a first flange and second flange, and is coupled with a transparent duct to allow users to see vane conditions and judge whether fluid is flowing. The vane holder further has a third flange and fourth flange that have respectively an external threaded portion formed thereon screwing with the fastening caps. One end of the vane holder holds a partition to form a passage opening. Each fastening cap has one end fastened to the third or fourth flange and another end screwed with a fluid pipe. The fastening caps and the duct are not integrally formed, hence fabrication is simpler and the cost is lower and production time is shorter, and coupling of the device and fluid pipe also is easier.

Abstract: A flow meter includes a transparent holder with an inlet and an outlet connected to a first, second and third fastening portions through a first, second, third and fourth connection ribs, a first and second fastening assemblies screwed respectively with the inlet and outlet, a butting member located at one end of the transparent holder, a flow scale plate located on a recess of the transparent holder, and a regulation member coupled to the inlet. The three fastening portions with respectively a first, second and third fastening hole are integrally formed with the inlet and outlet. Through the first and second fastening holes, the transparent holder is firmly fastened to a machine. Thus hydraulic pressure generated in the inlet and outlet does not cause loosening due to screw fastening of the three fastening portions. The structural strength of the transparent holder is increased and assembly is easier.

Abstract: A fluid visual inspection device includes a fluid visual inspection portion and one set of fastening caps. The fluid visual inspection portion includes a vane holder which has a first flange and second flange, and is coupled with a transparent duct to allow users to see vane conditions and judge whether fluid is flowing. The vane holder further has a third flange and fourth flange that have respectively an external threaded portion formed thereon screwing with the fastening caps. One end of the vane holder holds a partition to form a passage opening. Each fastening cap has one end fastened to the third or fourth flange and another end screwed with a fluid pipe. The fastening caps and the duct are not integrally formed, hence fabrication is simpler and the cost is lower and production time is shorter, and coupling of the device and fluid pipe also is easier.