Dwyer产品 645系列液用差压变送器美国德威尔压差表流量计差压计差压开关差压变送器

645系列液用差压变送器
产品说明：
精度为±0.25%，响应速度快，两线制
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系列变送器最适用于过程控制，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。
产品规格：
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.