用于粉末，物料，液體

CRF2系列 電容式料位變送器是兩線制4-20mA輸出的能夠監(jiān)測液體，粉體和顆粒物料的料位。采用了*的脈沖射頻導(dǎo)納技術(shù)，具有很高的測量精度和穩(wěn)定性能。CRF2系列測量料位高度的原理是通過測量槽罐壁和變送器探頭之間的電容的變化來導(dǎo)出它們之間的料位。對于非金屬的槽罐或這槽罐的側(cè)壁和探頭不平行的場合，必須要有接地參考點(diǎn)。
CRF2系列料位變送器有固定桿式或撓性管纜式兩種探頭，用于不同的應(yīng)用場合。零點(diǎn)和量程是直接按鍵校準(zhǔn)。訂購時可按需要定制探頭的長度。聚全氟乙丙烯(FEP) 覆膜的探頭耐腐蝕性能強(qiáng)。這種技術(shù)不會受到象手機(jī)，對講機(jī)或其它無線發(fā)射裝置等其它電磁信號的干擾。

Service: Liquids, Powders, And Bulk Materials Compatible With Wetted Materials.
Wetted Materials: Standard: Rod/Cable: FEP; Connection: 316 SS. Ground Option: Rod/Cable And Connection: 316 SS; Cable Spacers: PVC. Flange Option: Material Of Flange.
Capacitance Range: 0 To 2000 PF.
Sensitivity: 0.15 PF.
Minimum Span: 8 PF.
Accuracy: ±0.5 PF Or ±0.25% Of Span, Whichever Is Greater.
Repeatability: ±0.25 PF Or ±0.1% Of Span, Whichever Is Greater.
Temperature Limits: Ambient: -40 To 185°F (-40 To 85°C); Process: -40 To 250°F (-40 To 121°C).
Pressure Limit: 100 Psi (6.9 Bar).
Power Requirements: 12 To 35 VDC.
Output Signal: 4 To 20 MA Or 20 To 4 MA, 2 Wire.
Response Time: 0.5 Seconds.
Electrical Connection: Screw Terminal.
Conduit Connection: 1/2" NPT Female.
Process Connection: Standard: 3/4" NPT Male. Optional: See Catalog Page.
Enclosure Rating: NEMA 4X (IP66) Weather-Tight/Corrosion Resistant.
Spark/Static Protection: 106 Ohm Dissipation Resistance With Spark Gap. Surge Current To 100A Max.
Calibration: Zero, Span, 4 MA, 20 MA.
Mounting Orientation: Vertical.
Weight: 6 Ft Rod Type: 3.6 Lb (1.63 Kg).