德國flucon公司LAMBDA系統能快速、方便而準確地測定液體的導熱系數
LAMBDA系統導熱系數儀產品介紹
LAMBDA系統是一個緊湊的,界面友好的儀器,通過根據ASTM D2717熱線法,可以在一個非常寬的溫度和壓力范圍內測定導熱系數,適用于實驗室和現場的流體分析連接操作,包括納米顆粒分散流體的熱導率測量,LAMBDA可以獨立操作或者和計算機,配備RS232接口。
主要特點
- 測量快速:2 s內獲得數據,最大程度避免自然對流的影響;
- 測量準確:高重現性99%
- 適用廣泛:可用于-30~250 ℃、0.1~15 MPa內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量結果;
- 操作簡單:自動化程度高,無需專業人員即可操作設備; 符合ASTM D2717 ASTM D7896標準。
適應樣品種類
? 可測量的液體種類包括各種極性和非極性流體的純質及混合物:
? 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、少數碳氫化合物;
? 制冷劑:R134a、R12、R22、R123、二甲醚等;
? 油品:導熱油、汽油、煤油、柴油、潤滑油、壓縮機油、冷凍機油、硅油等;
? 粘稠液體:粘稠溶劑、果汁、血液、牛奶等;
? 化學試劑:水、甲苯、醇類、離子液體等。
? 可測量的氣體包括各種純質或者氣體混合物:
? 天然氣體:空氣、CH4、N2、CO2、CO;
? 新型推進劑等。
如:測水溶性樣品(水溶液型注射液,比如水、氯化鈉注射液等)、能測醇溶性樣品;測試溫度最低要求25度~200度。
技術參數
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