Bimetallic flowmeter | Doppler water flow meter

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1. Main types of instruments

There are many types of instruments, mainly including the following: temperature instruments: glass thermometers, bimetallic thermometers, pressure thermometers, and other contact thermometers. Non contact thermometers, temperature controllers, transmitters, etc. are used to accurately measure and regulate temperature. Medical instruments: human body thermometer: used for measuring the temperature of human skin and body. Blood pressure monitor: used to measure human blood pressure. Pressure instruments: pressure gauges, pressure gauges, differential pressure transmitters, pressure reducers, tire pressure gauges, etc., to ensure stable system pressure. Flow meters: flow meters, water meters, gas meters, etc., used to measure fluid flow. Liquid level control equipment such as level transmitters and level controllers. Electrical instruments and meters: ammeter, voltmeter, current power frequency meter, etc. Circuit breakers, switches, contactors and other protective and control equipment. Electronic measuring instruments: LCR measuring instruments, oscilloscopes, signal generators, etc., used for precision measurement of electronic components. Analytical instruments: chromatograph, fiber optic spectrophotometer, balance, etc., used for the analysis of chemical composition and physical properties. Optical instruments: microscopes, telescopes, photometers, etc., provide precise visual measurements and observations. Industrial automation instruments: control systems, regulating valves, intelligent instruments, etc., are the core components of contemporary industrial automation. Experimental instruments: scales, constant temperature equipment, corrosion test chambers, etc., meet the needs

of scientific research and laboratory work. Measuring tools and instruments: Vernier calipers, micrometers, and other measuring tools. Roundness meter, coordinate measuring machine, and other measuring instruments are used for accurate measurement of dimensions. Actuators: electric actuators, pneumatic actuators, etc., control the accurate movement of equipment. Display instrument: Using a digital display instrument as the main display, it clearly and intuitively displays various data. Supply instruments: electricity meters, thermostats, etc., serving energy management and environmental control in daily life. In addition, there are various types of instruments such as general experimental equipment, mechanical measuring instruments, scales, and industry-specific testing instruments and experimental equipment, which are widely used in various fields.

2. National standard for instrument calibration cycle

The national standard for instrument calibration cycle is as follows: Spring tube precision pressure gauge: Maximum calibration cycle: 1 year, according to JJG4 "Verification Regulations for Elastic Element Precision Pressure Gauge and Vacuum Gauge".

. Spring tube general pressure gauge: The longest calibration cycle is six months, according to JJG522013 "Verification Regulations for Spring tube General Pressure Gauge, Pressure Gauge Vacuum Gauge and Vacuum Gauge Reading Wheel". Automatic balanced display instrument: Maximum calibration cycle: six months, according to JJG742005 "Calibration Regulations for Industrial Process Measurement Recorders". Working glass liquid thermometer: Maximum calibration cycle: 1 year, according to JJG1302011 "Verification Regulations for Working Glass Liquid Level Thermome

Bimetallic flowmeter | Doppler water flow meter

1. Main types of instruments

2. National standard for instrument calibration cycle

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