Describe the following terms, pressure indicator, flow indicator, level indicator, temperature indicators.
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A pressure indicator is typically a gauge that is used to indicate pressure. These gauges have a variety of designs including; bourdon tube, helical, spiral, and bellows. Flow control primary instruments include; orifice plates, flow nozzles, pitot tubes, annubar pitot, magmeters, turbine meters, mass flow meters, nutating disks, oval gear, venturi tubes, vortex meters, target flow meters, and integral orifice flow meters. Level instruments include floats and float gauges, displacers, tapes and tape gauges, differential pressure transmitters, bubblers, load cells, capacitance probes, electromagnetic measuring device, and nuclear measuring instruments. Temperature indicators include:
• thermocouple
• thermistors
• Bimetallic temperature gauge
• Resistance Temperature Device RTD
• Thermometer
• Thermal filled bulbs
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