PSL 5.0 Hybrid Pump Station Level Controller

  • Maximum Range​ of Sensor
    32 ft (10m)
  • Accuracy​
    ±0.25% of Range
  • Output​
    Isolated 4-20mA, 1000 ohm load maximum
  • Options
    Plug and Play Optional Data Logger
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New Pump and Lift Station Level Controller

Ideal for sewage pump stations, lift stations, wet wells and tank level control with a non-contacting ultrasonic sensor mounted above the liquid. The new Greyline PSL 5.0 Level Controller has 6 independently programmable control relays for pump or valve control, level alarms, dialers, temperature alarm and echo-loss alarm.

Mount the non-contacting, ultrasonic sensor in the tank or wet well and install the watertight electronics in the control room or any location within 500 ft / 150 m. Use the simple menu system and built-in keypad to set up measurement range, relay set points and pump alternation sequence. A relay/pump run time report is updated and stored automatically for viewing on the PSL 5.0 backlit LCD display.

For hazardous locations, the ultrasonic sensor is rated Intrinsically Safe with an optional safety barrier. It is rated for measurement ranges up to 32 ft / 10 m, or use the optional PVC Sensor rated for 50 ft / 15.6 m measurement range.

New Dual-Technology Sensor Feature for Redundant Level Monitoring

Connect a submersible pressure sensor or other 4-20mA level transmitter to the PSL 5.0 for fail-safe hybrid sensing. The PSL 5.0 will auto-calibrate the redundant sensor and if signal is lost to the ultrasonic sensor, the redundant sensor will seamlessly take over monitoring until signal resumes from the ultrasonic. The redundant sensor is continuously monitored to ensure availability during primary sensor failure.

General Specification
Electronics Enclosure 

Watertight, dust tight NEMA4X (IP 66) polycarbonate with a clear, shatter-proof face 

Accuracy ±0.25% of Range or 2 mm (0.08") whichever is greater
Repeatability and Linearity ±0.1% 

White, backlit matrix - displays calibration menu, relay status, runtime reports and sensor status

Programming Built-in, 5-button keypad, password-protected
Power Input 100-240VAC 50-60Hz (see Options), 3.5 Watts maximum (with standard features)
Output Isolated 4-20mA, 1000 ohm
Control Relays 6 form 'C' dry contacts rated 5 amp SPDT; programmable level alarm, pump control, pump alternation, failsafe/echo-loss, air temperature alarm
Electrical Surge Protection  Sensor, 4-20mA and AC power input
Operating Temp. (electronics) -5° to 140°F (-20° to 60°C)
Sensor Specification
Maximum Range 

32 ft (10 m) with standard PZ34 sensor (Optional sensors for longer ranges) 

Deadband (Blanking) Programmable, Minimum 16"
Beam Angle

8°, Locate sensor 1 ft (300 mm) from tank sidewall for every 10 ft (3 m) depth

Operating Frequency

42 KHz

Exposed Materials PVC
Operating Temperature  40° to 150°F (-40° to 65°C) with automatic temperature compensation
Operating Pressure 20 psi (1.35 bar) maximum
Sensor Cable RG62AU coaxial

Sewage Lift Stations

Water Storage Tanks

Level Process Control C