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(cè)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(cè)量精度和穩(wěn)定性能。CRF2系列測(cè)量料位高度的原理是通過(guò)測(cè)量槽罐壁和變送器探頭之間的電容的變化來(lái)導(dǎo)出它們之間的料位。對(duì)于非金屬的槽罐或這槽罐的側(cè)壁和探頭不平行的場(chǎng)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(chǎng)合。零點(diǎn)和量程是直接按鍵校準(zhǔn)。訂購(gòu)時(shí)可按需要定制探頭的長(zhǎng)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(huì)受到象手機(jī)，對(duì)講機(jī)或其它無(wú)線發(fā)射裝置等其它電磁信號(hào)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).