Introduction: It uses the phenomenon of heat conduction to measure the pressure of the gas. It consists of a power supply system, a measuring circuit, a V/F conversion circuit and a single-chip microcomputer. The power supply system makes the temperature of the resistance gauge heating wire constant, that is, the resistance value of the heating wire is constant. Due to different gas pressures, the heat loss caused by the gas is different. The higher the gas pressure, the more heat is conducted. Since the automatic power supply compensation of the power supply system makes its heating wire temperature constant, the pressure of the gas can be obtained by testing the change of the power supply voltage. After the operation is amplified, it is processed by the single-chip microcomputer and displayed on the display board. At the same time, it outputs 0-10V (0-5V) standard voltage analog output or 4-20 mA standard current output through digital-to-analog conversion, and RS232 interface output. Features: 1. The instrument has an integrated design of display and vacuum sensor. 2. Small size. 3. Comes with display and vacuum gauge, 4. Easy to install and easy to use Technical parameter: Volume: 76X45 mm (equivalent to the size of a mobile phone) Equipped with sensor: ZJ-52T vacuum gauge tube (ZJ-54D thermocouple gauge can be used) Measuring range: 100000 to 0.1 Pa, measuring accuracy of ±15% (within the effective measuring range). Sensor interface can be used: 15.5 straight pipe, KF16 flange, KF25 flange, KF40 flange, etc.
Introduction: It uses the phenomenon of heat conduction to measure the pressure of the gas. It consists of a power supply system, a measuring circuit, a V/F conversion circuit and a single-chip microcomputer. The power supply system makes the temperature of the resistance gauge heating wire constant, that is, the resistance value of the heating wire is constant. Due to different gas pressures, the heat loss caused by the gas is different. The higher the gas pressure, the more heat is conducted. Since the automatic power supply compensation of the power supply system makes its heating wire temperature constant, the pressure of the gas can be obtained by testing the change of the power supply voltage. After the operation is amplified, it is processed by the single-chip microcomputer and displayed on the display board. At the same time, it outputs 0-10V (0-5V) standard voltage analog output or 4-20 mA standard current output through digital-to-analog conversion, and RS232 interface output.
