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更新时间：2024-12-20 浏览数：48
所属行业：电工电气> 电源> 开关电源
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产品规格：--
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包装说明：--
单 价：面议
PF3W740-F04-F-M，SMC系列
Note: Flow rate unit is based on standard conditions (20°C, 1 atm, 65% RH).
Model PFM510 PFM525 PFM550 PFM511
(Air quality grade is JIS B8392.1-1, 1.2 to 1.6.2 and ISO8573.1-1, 1.2 to 1.6.2.)
±1%F.S. or less (Fluid: Dry air)
电话：
传真：转8008
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..com
temperature measuring sensor (Rd), which are placed symmetrically from the center
of a platinum thin film coated heater (Rh) mounted on a membrane, and an ambient temperature
sensor (Ra) for measuring gas temperature.
The principle is as shown in the diagram on the right. (a) When the gas is static, the temperature
distribution of heated gas centered around Rh is uniform, and Ru and Rd have the same
resistance. (b) When the gas flows from the left side, it upsets the balance of the temperature
distribution of heated gas, and the resistance of Rd becomes greater than that of Ru.
The difference in resistance between Ru and Rd is proportional to the gas velocity, so measurement
and analysis of the resistance can show the flow direction and velocity of the gas.
Ra is used to compensate the gas and/or ambient temperature.
±5%F.S. or less (based on 0.35 MPa)
50 msec or 1 s (with response time selection function: 1 s at no-voltage input)
→ Refer to the internal circuits and wiring examples on page 921.
0 to 50°C (with no freezing and condensation)
Operating: 0 to 50°C Stored: –10 to 60°C (with no freezing and condensation)
Operating, Stored: 35 to 85%R.H. (with no condensation)
1000 VAC for 1 min. between external terminal and case
50 MΩ or more (500 VDC Mega) between external terminal and case
PF3W740-F04-F-M，SMC系列
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