LLC843F10P - LLC8 Series

Series: LLC8 Questions? Contact Littelfuse Support
Littelfuse Liquid Level Controllers
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The LLC8 Series is a low cost, single-probe conductive liquid level control designed for low liquid level cutoff protection. It offers a factory fixed time delay of 1 - 60s and is available for input voltages of 24, 120, or 230VAC. LED indicator illuminates whenever the LLC8’s isolated, 10A, SPDT output relay is energized. Sense resistance is fixed from 5K - 250K?. Available with manual/automatic reset or a special manual reset with a power outage feature that auto resets the unit when power is restored and the water level is acceptable. 24 and 120VAC units are UL recognized as limit switches under UL353 (230VAC units are UL 508) and CSA certified under Standard 14.


See datasheet for operation and reset details.

Property (Mouseover for details) Value
Input Voltage (V) 120VAC
Input Tolerance (%) -0.3
Input AC Line Frequency (Hz) 50/60Hz
Output Type Electromechanical relay
Output Form Isolated SPDT
Output Load Rating (VA) 10A resistive @ 240VAC; 1/4hp @ 125VAC; 1/2hp @ 250VAC
Time Delay Range 3s fixed
Time Delay Tolerance (%) ±20%
Reset Time (ms) Power outage manual reset delay ≤1s
Repeat Accuracy (%) ±10%
Setpoint vs Ambient Temperature and Operating Voltage (%) ±10%
Sense Voltage 12VAC at probe terminals
Sense Resistance (Ohms) 10 kΩ
Sense Resistance Tolerance ±10%
Control Type Resistance sensing for conductive liquids with time delay
Isolation Voltage (V) ≥2500V RMS between input and output terminals
Surge Protection IEEE C62.41-1991 Level A
Circuitry Printed circuit board is conformal coated to resist moisture and corrosion
Termination Type Electrical: 0.25 in. (6.35mm) male quick connect terminals; Reset switch and probes: 0.187 x 0.03 in (4.75 x 0.76 mm) male quick connect terminals
Mounting Method 0.50 in. (12.7mm) nylon standoffs with three #6 (M3.5 x 0.6) screws
Operating Temperature -40° to 60°C (-40°F to 140°F)
Storage Temperature (F/C) -40° to 80°C (-40°F to 176°F)
Humidity 95% relative non-condensing
Weight (lbs/g) ≅5.0oz (141.7g)