Post Tagged with: "transmitter"

pH Measurement

pH Measurement

Basic, Instrumentations 23 Tháng Sáu, 2014 at 6:08 chiều

pH measurement has a wide variety of industrial applications in virtually every industry. These range from water conditioning to specific process related measurements to waste treatment. Bài viết này sẽ giới thiệu sơ lược về phương pháp điện hóa là phương pháp sử dụng công cụ mà chuyển đổi đại lượng pH (độ hoạt động của ion H+) thành tínRead More

Filling material level measurement.

Filling material level measurement.

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:57 chiều

The “classical approach” to measuring the filling level With ball mills this working point is linked directly to the level of the material being ground in the mill. A mill that is too empty, i.e. one that has been underfed, operates extremely uneconomically from the energy point of view while a mill that is too full, i.e. has been overfed,Read More

Ultrasonic Level Measurement

Ultrasonic Level Measurement

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:53 chiều

Ultrasonic level instruments operate on the basic principle of using sound waves to determine liquid/ solid/slurries level. In addition to standard level or volume measurement, they can monitor open channel flow, determine the actual volumetric throughput in lift stations, measure differential level and control the pumps. Ultrasonic Level Transmitters consist of two elements; 1) a high efficiency transducer and, 2)Read More

Venturi & Dall Tube Flow Detectors

Venturi & Dall Tube Flow Detectors

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:46 chiều

HEAD FLOW METERS Flow measurement is an important process measurement to be considered in operating a facility’s fluid systems. For efficient and economic operation of these fluid systems, flow measurement is necessary. Head flow meters operate on the principle of placing a restriction in the line to cause a differential pressure head. The differential pressure, which is caused by theRead More

Orifice Plate Flow Detectors

Orifice Plate Flow Detectors

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:43 chiều

HEAD FLOW METERS Flow measurement is an important process measurement to be considered in operating a facility’s fluid systems. For efficient and economic operation of these fluid systems, flow measurement is necessary. Head flow meters operate on the principle of placing a restriction in the line to cause a differential pressure head. The differential pressure, which is caused by theRead More

Differential Pressure Level Detectors

Differential Pressure Level Detectors

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:13 chiều

The differential pressure (ΔP) detector method of liquid level measurement uses a ΔP detector connected to the bottom of the tank being monitored. The higher pressure, caused by the fluid in the tank, is compared to a lower reference pressure (usually atmospheric). This comparison takes place in the ΔP detector. Figure 9 illustrates a typical differential pressure detector attached toRead More

Float Level Detector

Float Level Detector

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:08 chiều

Ball Float The ball float method is a direct reading liquid level mechanism. The most practical design for the float is a hollow metal ball or sphere. However, there are no restrictions to the size, shape, or material used. The design consists of a ball float attached to a rod, which in turn is connected to a rotating shaft whichRead More

Gauge Glass Level Detector

Gauge Glass Level Detector

Basic, Instrumentations 23 Tháng Sáu, 2014 at 5:01 chiều

Gauge Glass A very simple means by which liquid level is measured in a vessel is by the gauge glass method (Figure 1). In the gauge glass method, a transparent tube is attached to the bottom and top (top connection not needed in a tank open to atmosphere) of the tank that is monitored. The height of the liquid inRead More

Thermocouple

Thermocouple

Basic, Instrumentations 23 Tháng Sáu, 2014 at 4:56 chiều

Thermocouple Construction A thermocouple is constructed of two dissimilar metal wires joined at one end. When one end of each wire is connected to a measuring instrument, the thermocouple becomes a sensitive and highly accurate measuring device. Thermocouples may be constructed of several different combinations of materials. The performance of a thermocouple material is generally determined by using that materialRead More

Resistance Temperature Detector – RTD

Resistance Temperature Detector – RTD

Basic, Instrumentations 23 Tháng Sáu, 2014 at 4:48 chiều

Temperature The hotness or coldness of a piece of plastic, wood, metal, or other material depends upon the molecular activity of the material. Kinetic energy is a measure of the activity of the atoms which make up the molecules of any material. Therefore, temperature is a measure of the kinetic energy of the material in question. Whether you want toRead More