美國(guó)FLOWLINE LG10 LG-1 LG11導(dǎo)波雷達(dá)料位計(jì)是依據(jù)時(shí)域反射原理(TDR Time Domain Reflectometry)為基礎(chǔ)的雷達(dá)料位計(jì)，時(shí)域反射原理首先是用于通訊電纜的故障檢測(cè)，今天我們將其成功應(yīng)用于工業(yè)測(cè)量，電磁脈沖以光速沿鋼纜或探棒傳播，當(dāng)遇到被測(cè)介質(zhì)表面時(shí)，部分脈沖被反射形成回波并沿相同路徑返回到脈沖發(fā)射裝置，發(fā)射裝置與被測(cè)介質(zhì)表面的距離同脈沖在其間的傳播時(shí)間成正比，回波的極性和振幅取決于上層介質(zhì)與下層介質(zhì)的介電常數(shù)εr。一般來(lái)講，上層的介質(zhì)通常為氣體，其介電常數(shù)接近εr1.0，下層被測(cè)介質(zhì)的介電常數(shù)較高。 調(diào)頻連續(xù)波雷達(dá)料位計(jì)是依據(jù)調(diào)頻連續(xù)波原理(FMCW Frequency Modulated ContinuousWave)為基礎(chǔ)的雷達(dá)料位計(jì)，這區(qū)別于脈沖式雷達(dá)，并因其優(yōu)越的性能而廣泛應(yīng)用于工業(yè)領(lǐng)域。使用線(xiàn)性調(diào)頻高頻信號(hào)，發(fā)射頻率隨一定時(shí)間間隔(掃描頻率)線(xiàn)性增加，頻率范圍為8.5G～9.9G，波長(zhǎng)約為3cm。由于發(fā)射頻率是隨著信號(hào)傳播的時(shí)間變化的，與反射物體距離成比例的低頻信號(hào)頻率f是由當(dāng)前發(fā)射頻率與接收的反射頻率的差值獲得的。雷達(dá)料位計(jì)適用于酸堿儲(chǔ)罐、漿料儲(chǔ)罐、固體顆粒、小型儲(chǔ)油罐。各類(lèi)導(dǎo)電、非導(dǎo)電介質(zhì)、腐蝕性介質(zhì)。如煤倉(cāng)、灰倉(cāng)、油罐、酸罐等雷達(dá)料位計(jì)的優(yōu)點(diǎn)
      ● 雷達(dá)料位計(jì)是非接觸式測(cè)量或TDR導(dǎo)波式測(cè)量 
      ● 雷達(dá)料位計(jì)應(yīng)用電磁脈沖進(jìn)行快速測(cè)量，精度高，抗干擾能力強(qiáng)  
      ● 耐腐蝕（探頭大多采用316不銹鋼或PVDP等材料） 
      ● 耐壓高（40Kg/cm2） 
      ● 耐溫高（200℃）

雷達(dá)料位計(jì)的注意事項(xiàng)
      ● 雷達(dá)料位計(jì)對(duì)于安裝空間有一定的要求 
      ● 注意介質(zhì)的介電常數(shù)，并依據(jù)介電常數(shù)的大小選擇適合的型號(hào)

EchoWave^® LG10-11 Guided Wave Liquid Level Transmitter

Range: Rod & coaxial: 9.8’ (3m), cable: 18’ (5.5m)

Accuracy: ± 3mm

Dead band: Top: 4” (10cm), bottom: 2” (5cm)

Repeatability: < 2mm

Resolution: < 2mm

Configuration: WebCal^? PC, Windows^®, USB 2.0

Supply voltage: 10-30 VDC

Max. consumption: < 50mA @ 24 VDC

Signal output: 4-20mA, 3-wire

Signal fail-safe: 4mA, 20mA, 21mA, 22mA or hold last

Dielectric: > 1.8

Process temp.: F: -40o to 302o, C: -40o to 150o

Ambient temp.: F: -40o to 185o, C: -40o to 85o

Pressure: -14.5 to 250 PSI, (-1 to 17 bar)

Enclosure rating: NEMA 4

Encl. material: Aluminum

Feed through mat.: 316L SS & PEEK

Conduit entrance: (1) 1/2” NPT connector

Probe material: Rod: & coaxial: 316L SS, cable: 316 SS

Process mount: 3/4” NPT (3/4” G)

Classification: General purpose

Certification: CSA, NRTL

Compliance: CE, CRN, RoHS

P/N	DESCRIPTION
LG10-0003-00-036	36″ (.9m) rod, 3/4″ NPT, w/o Fob
LG10-0003-01-036	36″ (.9m) rod, 3/4″ NPT, w/Fob
LG10-0013-00-036	36″ (.9m) rod, 3/4″ G, w/o Fob
LG10-0013-01-036	36″ (.9m) rod, 3/4″ G, w/Fob
LG10-0003-00-072	72″ (1.8m) rod, 3/4″ NPT, w/o Fob
LG10-0003-01-072	72″ (1.8m) rod, 3/4″ NPT, w/Fob
LG10-0013-00-072	72″ (1.8m) rod, 3/4″ G, w/o Fob
LG10-0013-01-072	72″ (1.8m) rod, 3/4″ G, w/Fob
LG10-0003-00-118	118″ (3m) rod, 3/4″ NPT, w/o Fob
LG10-0003-01-118	118″ (3m) rod, 3/4″ NPT, w/Fob
LG10-0013-00-118	118″ (3m) rod, 3/4″ G, w/o Fob
LG10-0013-01-118	118″ (3m) rod, 3/4″ G, w/Fob
LG10-1003-00-036	36″ (.9m) coaxial, 3/4″ NPT, w/o Fob
LG10-1003-01-036	36″ (.9m) coaxial, 3/4″ NPT, w/Fob
LG10-1013-00-036	36″ (.9m) coaxial, 3/4″ G, w/o Fob
LG10-1013-01-036	36″ (.9m) coaxial, 3/4″ G, w/Fob
LG10-1003-00-072	72″ (1.8m) coaxial, 3/4″ NPT, w/o Fob
LG10-1003-01-072	72″ (1.8m) coaxial, 3/4″ NPT, w/Fob
LG10-1013-00-072	72″ (1.8m) coaxial, 3/4″ G, w/o Fob
LG10-1013-01-072	72″ (1.8m) coaxial, 3/4″ G, w/Fob
LG10-1003-00-118	118″ (3m) coaxial, 3/4″ NPT, w/o Fob
LG10-1003-01-118	118″ (3m) coaxial, 3/4″ NPT, w/Fob
LG10-1013-00-118	118″ (3m) coaxial, 3/4″ G, w/o Fob
LG10-1013-01-118	118″ (3m) coaxial, 3/4″ G, w/Fob
LG11-2003-00-216	216″ (5.5m) cable, 3/4″ NPT, w/o Fob
LG11-2003-01-216	216″ (5.5m) cable, 3/4″ NPT, w/Fob
LG11-2013-00-216	216″ (5.5m) cable, 3/4″ G, w/o Fob
LG11-2013-01-216	216″ (5.5m) cable, 3/4″ G, w/Fob