The general purpose level controller displays engineering units with four 4-20 mA continuous level sensor inputs and 6 programmable relays. Select from one of three run configurations including multi-tank with 4 level sensor inputs and 4 relays; or pump control with 1 level sensor input and 6 relays for lift stations in simplex (one pump) or duplex (two pumps) level control modes; or differential level with 2 level sensor inputs and 4 relays for municipal screen or rake control. Relays can be configured on a single set point (high or low level alarm) or latched on two set points for automatic fill or empty pump or valve control with selectable time delay. The graphic LCD display indicates span and relay status for each input channel. The optional MicroSD card enables data-logging storage and retrieval.


  • Multi-tank controller with three run mode configurations
  • Graphic LCD display indicates channel span and relay status
  • Easy user configuration via the push button display module
  • DIN enclosure with NEMA 4X faceplate and shallow case
  • Simulation for configuration testing and troubleshooting
  • Data logging and retrieval via the optional MicroSD card


P/N Description From
LI90-1001 Multi-tank level controller Consult Factory


Display type: LCD, graphic

Display pixels: 128 x 64

Display units: Engineering

Display output: 0 to 999999

LCD indication: Relay status

Configuration: Push button

Backlight: Yes

Memory: Non-volatile

Opt. memory: MicroSD card (up to 1 GB)

Linearization: Tank shapes

Sensor inputs: -1001: (4) 4-20 mA, -2001: (2) 4-20 mA

Supply voltage: 10-30 VDC

Contact type: -1001: 6 SPST relays, -2001: No relays

Consumption: 130 @ 24 VDC

Contact rating: 3A @ 30 VDC or 250 VAC resistance load (-1001 only)

Repeater output: (2) 4-20 mA, 24 VDC (-2001 only)

Ambient temp.: F: 32° to 122°, C: 0° to 50°

Weight: 12.5 oz (0.354 kg)

Enclosure type: 1/4 DIN, panel mount with 35mm DIN rail

Enclosure rating: NEMA 4X (IP65) faceplate

Enclosure mat.: Polycarbonate

Classification: General purpose

Compliance: CE

Approvals: cULus