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[VIP第6年] 指数:4
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645系列 液用差压变送器 在高低压端口都能接受液体或气体，采用了灵敏的电容式传感器。它输出和差压成线性的4-20 mA的信号输出，精度达到0.25%。645系列变送器*适用于过程控制，过滤器清洁状态监测，冷冻设备，水泵多级控制，暖通空调设备，液位监测，等等。为了安装方便，可选择三阀组。它自带泄放口，可消除管线中的气室现象。
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Service: Compatible gases or liquids on both pressure and reference sides.
Wetted Materials: 17-4 PH stainless steel, 300 Series stainless steel, fluoroelastomer and silicone O-rings and bleed screw seals.
Accuracy: ±0.25% FS (RSS).
Temperature Limits: Operating: 0 to 175°F (-22 to 80°C); Storage: -65 to 260°F (-54 to 126°C).
Pressure Limits: (High side) 1 to 5 psi: 20 x FS, 10 to 25 psi: 10 x FS, 50 psi: 5 x FS, 100 psi: 2.5 x FS; (low side) 2.5 x FS.
Thermal Effects: (includes zero and span) ±0.02% FS/°F, 30 to 150°F (-1 to 65°C).
Power Requirements: 11 to 30 VDC.
Output Signal: 4 to 20 mA, 2-wire.
Zero and Span Adjustments: Adjustable, ±1 mA, non-interactive.
Response Time: 30 to 50 ms.
Loop Resistance: 0 to 1000Ω.
Electrical Connection: Barrier strip terminal block with conduit enclosure and .875" (22 mm) diameter conduit opening.
Process Connection: 1/4"-18 female NPT.
Housing: Stainless steel/aluminum, NEMA 4X (IP56).
Weight: 14.4 oz (0.4 kg).
Agency Approvals: CE.
3-Valve Manifold Assembly
Manifold: Brass.
Valve Type: 90° on/off.
Process Connection: 1/4"-18 female NPT.
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