Available in CSA approved, general purpose (LC4X) or isolation (LC9X) versions with built-in intrinsic safety barriers for use with associated apparatus, the level switch controller is offered in three configurations for pump and valve control. The LC40/90 accepts one level switch input and provides one 10A relay. The LC41 accepts two level switch inputs and provides one latching 10A relay for automatic fill or empty control. The LC42/92 accepts three level switch inputs with one latching 10A relay output for automatic fill or empty control, and a second non-latching 10A relay for high level alarm or low level alarm. Select the general purpose or isolation controller type and model based on your classification and control requirements. For field mount installation, add a single or double NEMA box with optional flash and/or audible alarm.


  • Fail-safe relay control of pumps or valves with 0-60 second delay
  • Optional built-in intrinsic safety barriers for hazardous applications
  • Easy setup with LED indicators for sensor, power and relay status
  • 35 mm DIN rail mount PP enclosure with removable terminal strips
  • Invert switch changes relay state from NO to NC without rewiring
  • Available with custom NEMA boxes and tank alarm accessories


P/N Description From
LC40-1001 General purpose, 1 relay, 1 sensor $275.00
LC41-1001 General purpose, 1 latching relay, 2 sensors $325.00
LC42-1001 General purpose, 2 relays (1 latching), 3 sensors $385.00
LC90-1001 Isolation, 1 relay, 1 sensor $455.00
LC92-1001 Isolation, 2 relays (1 latching), 3 sensors $585.00
LM92-1202 Single NEMA box, windowed, 35mm rail, PC $500.00
LM92-2202 Double NEMA box, windowed, 35mm rail, PC $530.00
LC09-2014 Red flash / audible alarm, 85 dB, IP65 $560.00
LC09-2034 Red, yellow & green flash / audible alarm, 85 dB, IP65 $840.00
LC09-2054 Selectable RGYBW flash / audible alarm, 85 dB, IP65 $700.00
LC09-0000 Flash / audible alarm reset button, NEMA 4X $160.00


Supply voltage: 120/240 VAC @ 50-60 Hz

Consumption: 5 watts maximum

Sensor inputs: LC40/90: (1) two wire level switch, LC41: (2) two wire level switches, LC42/92: (3) two wire level switches

Sensor supply: 13.5 VDC @ 27 mA

LED indication: Sensor, power & relay

Contact type: LC40/90: (1) SPDT relay, LC41: (1) SPDT latching relay, LC42/92: (2) SPDT relays (one latching)

Contact rating: 250 VAC @ 10A

Contact output: Selectable NO / NC

Contact latch: LC40/90: N/A, LC41: Selectable ON / OFF, LC42/92: Selectable ON / OFF

Contact delay: 0-60 seconds

Ambient temp.: F: -40° to 158°, C: -40° to 70°

Enclosure type: 35mm DIN rail

Enclosure mat.: PP, UL94VO

Classification: LC4X: General purpose, LC9X: Associated apparatus

Approvals: CSA, LR 79326

Safety: Class 1, Groups A, B, C (LC9X only) & D; Class II, Groups E, F & G; Class III

Parameters: Voc = 17.47 VDC; Isc = (LC9X only) 0.4597A; Ca = 0.494 μF; a = 0.119 mH