Starting at $1,995.00

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  • Controls, transmits and displays level
  • For pump stations, wet wells & tank level control
  • Accuracy: ±0.25% of Range or 2mm (0.08in)
  • Non-contacting ultrasonic sensor
  • NEMA4X (IP67) polycarbonate enclosure
  • Accepts pressure sensor input for redundant monitoring
  • Isolated 4-20mA output & 6 relays
  • Built-in 5-key calibrator
  • Logs and displays relay run times
  • Large backlit LCD display
  • Optional plug and play data logger

What's in the Box

  • Level sensor
  • Coaxial sensor cable
  • Auxiliary sensor (accepts redundant 4-20mA)
  • Installation and operation manual
  • NIST certificate

The Greyline Instruments PSL 5.0 level controller uses a non-contacting ultrasonic sensor mounted above the liquid and is ideal for sewage pump stations, lift stations, wet wells and tank level control. The PSL 5.0 includes six independently programmable control relays for pump or valve control, level alarms, dialers, temperature alarm and echo-loss alarm.

Setting up and using the PSL 5.0 is easy. Simply 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. 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 unit's backlit LCD display.

The PSL 5.0 sets a new level of reliability. It operates with an ultrasonic level transducer as its primary sensor but also accepts connections from 4-20mA level sensors for redundancy. If the ultrasonic transducer loses signal from foam on the water surface for example, the redundant sensor will take over reading instantly. As soon as the ultrasonic sensor receives new echoes, it will resume function as the primary sensor. The PSL 5.0 will auto-calibrate the redundant sensor and monitor it continuously to ensure availability during primary sensor failure.


Greyline Instruments XC Sensor Cable
RG62AU coaxial cable available in lengths up to 500 feet


Greyline Instruments PZ15-LP Level Sensor
Low profile, non-contacting ultrasonic level sensor ideal for confined spaces and small flumes
Greyline Instruments PZ15 Level Sensor
Non-contacting ultrasonic level sensor is small enough for very small flumes and powerful enough for really large applications.
Greyline Instruments PZ34 Level Sensor
Non-contact, PVC level sensor with 32 foot range with liquids
Greyline Instruments PZ32T Level Sensor
Non-contact, PVC and Teflon level sensor with 32 foot range with liquids
Greyline Instruments PZ32TE Level Sensor
Non-contact, Teflon level sensor with 32 foot range in liquids
Greyline Instruments PS Series Pressure Sensors
Two wire, 4-20mA output, gauge type pressure sensor available in submersible or threaded models


Please consider these optional accessories.

Greyline Instruments JB2X Sensor Cable Junction Box
NEMA4X/IP66 polycarbonate junction box for extending sensor cable lengths
Greyline Instruments CHS Spare Electronics Set
Spare set electronics with mounting chassis (standard features)