德國(guó)flucon公司LAMBDA系統(tǒng)能快速、方便而準(zhǔn)確地測(cè)定液體的導(dǎo)熱系數(shù)
LAMBDA系統(tǒng)導(dǎo)熱系數(shù)儀產(chǎn)品介紹
LAMBDA系統(tǒng)是一個(gè)緊湊的,界面友好的儀器,通過(guò)根據(jù)ASTM D2717熱線法,可以在一個(gè)非常寬的溫度和壓力范圍內(nèi)測(cè)定導(dǎo)熱系數(shù),適用于實(shí)驗(yàn)室和現(xiàn)場(chǎng)的流體分析連接操作,包括納米顆粒分散流體的熱導(dǎo)率測(cè)量,LAMBDA可以獨(dú)立操作或者和計(jì)算機(jī),配備RS232接口。
主要特點(diǎn)
- 測(cè)量快速:2 s內(nèi)獲得數(shù)據(jù),最大程度避免自然對(duì)流的影響;
- 測(cè)量準(zhǔn)確:高重現(xiàn)性99%
- 適用廣泛:可用于-30~250 ℃、0.1~15 MPa內(nèi)各種極性和非極性流體;
- 樣品用量少:只需要30 mL就可以獲得可靠的測(cè)量結(jié)果;
- 操作簡(jiǎn)單:自動(dòng)化程度高,無(wú)需專業(yè)人員即可操作設(shè)備; 符合ASTM D2717 ASTM D7896標(biāo)準(zhǔn)。
適應(yīng)樣品種類
廣泛適用于不同溫度條件下各種極性和非極性液體,可測(cè)試的樣品包括納米流體、液體燃料、制冷劑、冷凍液、潤(rùn)滑油、離子液體等。
? 可測(cè)量的液體種類包括各種極性和非極性流體的純質(zhì)及混合物:
? 納米流體:氧化鋁納米流體、石墨納米流體、Fe3O4納米流體、ZrO2納米流體;
? 冷凍液:乙二醇、丙三醇、四氯化碳、少數(shù)碳?xì)浠衔铮?br />
? 制冷劑:R134a、R12、R22、R123、二甲醚等;
? 油品:導(dǎo)熱油、汽油、煤油、柴油、潤(rùn)滑油、壓縮機(jī)油、冷凍機(jī)油、硅油等;
? 粘稠液體:粘稠溶劑、果汁、血液、牛奶等;
? 化學(xué)試劑:水、甲苯、醇類、離子液體等。
? 可測(cè)量的氣體包括各種純質(zhì)或者氣體混合物:
? 天然氣體:空氣、CH4、N2、CO2、CO;
? 新型推進(jìn)劑等。
如:測(cè)水溶性樣品(水溶液型注射液,比如水、氯化鈉注射液等)、能測(cè)醇溶性樣品;測(cè)試溫度最低要求25度~200度。
技術(shù)參數(shù)
Electronic unit LAMBDA
Instationary heat wire resistance measurement in accordance with ASTM D7896
Thermal conductivity 10 to 2.000 mW/mK
Accuracy +/- 2 % reading
Reproducibility +/- 1 % reading
Repeatability +/- 0.5 % reading
Temperature sensor PT100 +/- 0.1o C
Specific heat (computed) 0.1 to 1 cal/g o C
Measuring time approx. 30 s
Display: LC-Display
Digital interface: RS 232
Analog interface: 0…10 V or 4…20 mA
(thermal conductivity)
0…10 V or 4…20 mA
(temperature)
controller interface: RS232 ( heating unit)
Housing: Design electronic housing
Size/weight (approx.): 230*350*140 mm, 3 kg
Power supply: 110-230 VAC, 50/60 Hz
Ambient temperature: 10 to 40o C
Sensor unit LAMBDA
Heat wire element: Pt
Dimensions: designed to be screwed
into measuring chamber
(see 4.3)
Material: stainless steel
Temperature sensor PT100 +/- 0.1°C
(integrated)
Sensor cable: L = 1 m
Temperature range: -50°C to 300C
Measured medium: fluids, powders, gels &
pastes
Measuring chamber LAMBDA
Stainless steel chamber
Containment: D=36 mm, L=90 mm
Material: stainless steel
Temperature range: -50°C to 300°C
Pressure range: 0 to 35 bar
Interface cable RS232 (LAMBDA – PC)
Software LAMBDA System
(operating system WINDOWS XP and
higher versions)
恒溫配置:
Block thermostat for
EPSILON+ / LAMBDA
for the fully automatic determination of the dielectric
properties of fluids as a function of temperature
Type CL-355A-230
Temperature range Room temperature to 400
degree C (by use with the
EPSILON+ up to 180° C
& up to 300°C with the
LAMBDA) Temp. stability +/- 0,3 degree C
Temp. set manually & automatically
Power supply 230 VAC, 50/60 Hz
Controller interface RS232