Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器
Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器
基本技術(shù)參數(shù):
適用于SF6氣體或是其它氣體
SF6氣體密度變送器應(yīng)用于高壓及中壓開(kāi)關(guān)柜
SF6氣體密度變送器測(cè)量原理:石英晶振測(cè)量
變送器測(cè)量精度:1.0
溫度信號(hào)精度:環(huán)境溫度下±2°C,在 -40...85°C: ±3°C
變送器輸出:數(shù)字信號(hào)或是模擬電流
Trafag,8774,SF6氣體密度變送器,SF6混合氣特高壓氣體密度傳感器
- Continuous measurement數(shù)字信號(hào)可連續(xù)輸出無(wú)飄移
- Protection IP65防護(hù)等級(jí)IP65
- No maintenance無(wú)需維護(hù)
- Compact緊湊型設(shè)計(jì)
- Vibration and shock-proof防振動(dòng)和抗沖擊
- Suitable for outdoor usage適合戶外使用
- Response time <10ms與密度變化時(shí)響應(yīng)時(shí)間<10ms
Application
High voltage switchgear
Medium voltage switchgear
Main characteristics
Density Sensor for SF6 and other gases
? Principle: Oscillating quartz measurement
? Measuring range: 0...60 kg SF6 /m3
? Output
Digital: current pulses onto supply current
Analogue: current loop
? Accuracy: ±1.8% FS max.
±1.0% FS typ.
The Trafag gas density sensor type 8774 was specifically designed for surveying insulation gases.
The gas density is measured with an oscillating quartz with excellent long term stability. The constant resonant frequency of a quartz oscillator
under vacuum is compared with the resonant frequency of an identical quartz situated in the sample gas. The difference in the resonant frequency is proportional to the density of the sample gas. The measured density is proportional to the pulse frequency or to the mA output.
With the digital variant additionally the temperature can be measured over the pulse width of the frequency signal.
Main features
Continuous measurement of density and temperature
? long term drift free output signal
? Protection IP65
? No maintenance
? Compact
? Vibration and shock proof
? Suitable for outdoor usage
? Response time <10ms (with density changes)
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