产品介绍：
GFM系列 气体质量流量计将节流装置和直管传感器结合在一起，能够精确可靠地测量流量。它不受温度和压力变化的影响。采用3位半数显显示气体流量，可90度旋转的LCD显示。可和GFT悉尼流量积算器配合使用。GFM带有NIST溯源证书。
Service: Clean gases compatible with wetted parts.
Wetted Materials: GFM-1XXX: anodized aluminum, brass, 316 SS and fluoroelastomer o-rings; GFM-2XXX: 316 SS and fluoroelastomer o-rings.
Accuracy: ±1% FS including linearity over 59 to 77°F (5 to 25°C) and 5 to 60 psia (0.34 to 4 bar); Series X143, X144, X145, ±1.5% FS.
Repeatability: ±0.5% of full scale.
Response Time: 2 seconds to within ±2% of actual flow.
Output: Linear 0-5 VDC and 4-20 mA.
Maximum Particulate Size: 5 microns.
Temperature Limits: 32 to 122°F (0 to 50°C).
Power Supply: 12-26 VDC.
Process Connections: 1/4" compression fitting for flow rates ≤50 L/m; 3/8" for 100 and 200 L/m; 1/2" for 500 L/min; 3/4" for 1000 L/min.
Pressure Limits: 1000 psig (68.9 bar); Series GFM-X143, X144, X145, 500 psig (34.5 bar).
Leak Integrity: 1 x 10-9 sccs of Helium.
Display: 90° tiltable, 3-1/2 digit.
Agency Approvals: CE.
Model 264 传感器在全球的安装数量已高达上百万只，是HVAC 楼宇自动化、高精度医药和卫生保健设施中低压差测量应用的“标准”产品。Model 264 型超低差压传感器使用闭端不锈钢焊接电容感应元件，仅要求极小的放大倍率，可为各类关键安装应用提供出色的精度和长期可靠性。Model 264 采用稳固设计，使用黄铜倒钩接头、卡轨安装架、以及可选的导管盖，可实现简单、稳定的安装。特性·**支持10 PSI 超压·安装方便·0~5VDC 或4~20mA 模拟输出·误接线全保护·使用非调整直流电源供电·满足CE 标准应用·暖通空调（HVAC）·能源管理系统·VAV 及风扇控制·洁净工程·OEM·实验室及通风橱控制·烘箱增压及炉通风控制·医疗仪器及设备