LLC1 Series – Open Board Liquid Level Controls Series - Littelfuse LLC1 Open Board Liquid Level Controls Provide Superior Protection

Series: LLC1 Series – Open Board Liquid Level Controls
Questions? Contact Littelfuse Support
External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The LLC1 series is a single-probe, conductive liquid level control designed for OEM equipment and commercial appliance applications. This unit may be ordered with fixed-fill or fixed-drain operation. A time delay (1–60 s) prevents rapid cycling of the output relay. On adjustable units, the sensitivity adjustment allows accurate level sensing while ignoring foaming agents and floating debris. Isolated ac voltage is provided at the probe to prevent electrolysis. A trickle current of less than 1 mA determines the presence or absence of liquid between the probe and common. The LLC1 series printed circuit board is conformally coated to resist moisture and corrosion.

Operation
Drain (pump-down mode): When the liquid level rises and touches the probe, a fixed 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. The output relay then de-energizes and remains de-energized until the liquid again touches the probe.

Fill (pump-up mode): When the liquid level falls below the probe, a fixed 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.

Features

  • Isolated ac voltage on probe
  • Open PCB design
  • Conformally coated PCB
  • Sensitivity adjustment

Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Access specifications, certifications, check availability and order parts below

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
LLC14A1AX120 VacNon-isolated SPST and isolated SPDT contacts1 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
LLC14A5AX120 VacNon-isolated SPST and isolated SPDT contacts5 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
LLC14B15AX120 VacNon-isolated SPST and isolated SPDT contacts15 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
LLC14B1AX120 VacNon-isolated SPST and isolated SPDT contacts1 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
LLC14B60AX120 VacNon-isolated SPST and isolated SPDT contacts60 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
LLC16A25AX230 VacNon-isolated SPST and isolated SPDT contacts25 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
LLC16A3AX230 VacNon-isolated SPST and isolated SPDT contacts3 s fixed0.25 in. (6.3 mm) male quick connect terminals0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws (use terminal 5 for probe common)3.5 H x 2.75 W x 2 D in. (88.9 x 69.9 x 50.9 mm)0 KgON/OFF (single level) resistance sensor with built-in time delay to prevent rapid cycling50 / 60-0.310 A resistive @ 120/240 Vac and 28 Vdc; 1/3 hp @ 120/240 VacElectromechanical relayGuaranteed rangeAdjustable to 250Low voltage AC between probe and common; isolated from input and ouputCheckOrder
To request product environmental information, please complete the Product Environmental Information Request Form.


  • Showing 2 items