LLC4 Series – Liquid Level Controller 系列 - Littelfuse LLC4 Liquid Level Controller Provides Superior Protection

系列: LLC4 Series – Liquid Level Controller
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The LLC4 series combines resistance-sensing circuitry with solid-state timing to provide single-probe level maintenance. On adjustable units, the sensitivity adjustment allows accurate level sensing while ignoring foaming agents and floating debris. Isolated 12 V ac is provided at the probe to prevent electrolysis. A trickle current of less than 1 mA determines the presence or absence of conductive liquid between the probe and common. The LLC4 series can be used with many types of low voltage (resistance changing) transducers to perform other control functions like temperature limit control, photo limit control, condensation sensing, and ice sensing. This unit features an industry standard, eight-pin octal plug connection.

工作原理

Drain (pump-down mode): When the liquid level rises and touches the probe, the time delay begins. This time delay prevents rapid cycling of the output relay and its load. At the end of the time delay, the output relay energizes and remains energized until the liquid level falls below the probe level. The output relay de-energizes and remains de-energized until the liquid rises and touches the probe.

Fill (pump-up mode): When the liquid level falls below the probe, the time delay begins. This time delay prevents rapid cycling of the output relay and its load. At the end of the time delay, the output relay energizes and remains energized until the liquid level rises and touches the probe. The output relay then de-energizes and remains de-energized until the liquid level again falls below the probe level.

功能与特色

  • Isolated 12 V ac voltage on probes
  • Industry standard 8-pin octal plug connection
  • Sensitivity adjustment

产品文献

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Catalog #Input
Voltage (V)		Output
Form		Time Delay RangeTermination TypeMounting MethodDimensionsWeight (lbs/g)Control TypeInput AC Line Frequency (Hz)Input Tolerance (%)Output Load Rating (VA)Output TypeSense Resistance ToleranceSense Resistance (Ohms)Sense VoltageStockSamplesCompare
产品号输入
电压（V）		输出
型式		延时范围端接类型安装方法尺寸规格重量（磅/克）Control TypeInput AC Line Frequency (Hz)Input Tolerance (%)Output Load Rating (VA)输出类型Sense Resistance Tolerance感应电阻（Ohms）Sense Voltage库存样品比较
LLC42A10A 24 Vac绝缘式SPDT10 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.354 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC42A1A 24 Vac绝缘式SPDT1 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.354 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC42B15A 24 Vac绝缘式SPDT15 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.354 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44A10A 120 Vac绝缘式SPDT10 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44A15A 120VAC绝缘式SPDT15s fixed八脚8引脚插入式Plug-in socket2.91 x 2.39 x 1.78 in. (73.9 x 60.7 x 45.2mm)≅6.0oz (170g)ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling-0.34A resistive @ 240VAC and 28VDC; 1/10hp @ 240VACElectromechanical relay1K ±500 Ω at low end; 250K ±25% at high endAdjustable to 250kΩ12VAC at probe terminals
LLC44A1A 120 Vac绝缘式SPDT1 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44A2A 120 Vac绝缘式SPDT2 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44A4A 120 Vac绝缘式SPDT4 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44A5A 120 Vac绝缘式SPDT5 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44A60A 120 Vac绝缘式SPDT60 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B1A 120 Vac绝缘式SPDT1 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B20A 120 Vac绝缘式SPDT20 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B2A 120 Vac绝缘式SPDT2 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B30A 120 Vac绝缘式SPDT30 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B4A 120 Vac绝缘式SPDT4 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B5A 120 Vac绝缘式SPDT5 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay1 kΩ ±500; at low end; 250 kΩ ±25% at high endAdjustable to 25012 Vac at probe terminals查看 Order
LLC44B5F100 120 Vac绝缘式SPDT5 s fixed八脚8引脚插入式Plug-in socket2.91 H x 2.39 W x 1.78 D in. (73.9 x 60.7 x 45.2 mm)0公斤ON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.34 A resistive @ 240 Vac and 28 Vdc; 1/10 hp @ 240 VacElectromechanical relay±10% or 500 Ω whichever is greater100 fixed12 Vac at probe terminals查看 Order
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