1. Product Overview
YGM303 air flow transmitter is based on the principle of pitot tube to measure the velocity of flow, and uses the patented rhombus velocity averaging piece to accurately measure the air flow. On the windward side of the high pressure area of the test piece, the average number of openings is opposite to the round holes to measure the average wind speed of the section. On the back flow side of the test piece, there are several pairs of static pressure holes, and the diamond section is designed to make the air pressure in the steady flow area at the static pressure hole on the leeward side of the test piece less susceptible to the influence of turbulent air flow, the air flow is more stable, and the air volume is measured more accurately. It can be used to measure the air volume in harsh environments.
2. Technical parameters
Measuring range: selected according to the air flow  on site
Accuracy: ± 6% FS, ± 4% FS when the gas flow rate is stable
Signal output: current output type: 4 ～ 20mA (three wire system); Load resistance RL ≤ 500 Ω
Voltage output type: 0 ～ 10V (three wire system); Load resistance RL ≥ 10K Ω
485 output type: standard ModBus RTU
Response time: T90 ≤ 3s
Power supply: 20~28VDC
Electrical connection: M16 × 1.5, cable diameter: 4-8mm
Enclosure protection grade: IP65
Working pressure: less than 1 Bar
Working temperature: transmitter: - 40 ℃~+50 ℃; Probe rod: - 40 ℃～+80 ℃, - 40 ℃～+190 ℃ (optional)
Storage environment: temperature: - 20 ℃~+60 ℃; Humidity: 0 ～ 85% RH
3. Circuit connection

4. Installation dimension drawing

5. Model Selection Table