gfc/gfm系列气体质量流量显示控制器将直管测量装置与限流元件结合起来提高了精度和重复性。 series gfc gas mass flow controllers combine a straight tube sensor with a restrictor flow element to provide high accuracy andrepeatability. flow rates are virtually unaffected by temperature and pressure variations. gas mass flow controllers utilize an electromagnetic valve and pid electronics to maintain continuouscontrol by comparing measured sensor signal set to flow rates. setpoints can be adjusted with local potentiometers or remotely via 0 to 5 vdc or 4 to 20 ma analog signal. actual gas flow is displayedin engineering units on a 3-1/2 digit, 90° tiltable lcd readout. units can be used with series gft flow totalizer for applications requiring totalization. series gfc includes a nist traceablecertificate. specificationsservice: clean gases compatible with wetted parts.wetted materials: gfc-1xxx: anodized aluminum, brass, 316 ss andfluoroelastomer o-rings; gfc-2xxx: 316 ss and fluoroelastomer o-rings.accuracy: ±1.5% fs including linearity over 59 to 77°f (5 to 25°c) and 5 to 60 psia (0.35 to 4bar).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.max.particulate size: 5 microns.temperature limits: 32 to 122°f (0 to 50°c).power supply: ±12 vdc.process connections: 1/4 compression fittingfor 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: 500 psig (34.5 bar).leak integrity: 1 x 10-7 sccs ofhelium.display: 90° tiltable, 3-1/2 digit.agency approvals: ce.

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成都广控仪表设备有限公司

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