Ranger Plus™ LTRP Ultrasonic Level Transmitter (up to 35ft)

The Ranger Plus™ Ultrasonic Level Sensor provides accurate non-contacting level measurement up to 35 feet and features (3) Analog Outputs and (2) Switches. The analog output modes are 0-10 VDC, 4-20mA Sinking, and 4-20mA Sourcing. The switches are configurable as either “PNP” or “NPN” type (sourcing or sinking). Each has an adjustable set point, hysteresis, window, initial conditions, ON delay, OFF delay, and loss of target response to easily create controls and alarms. The sensor is housed in a chemically inert PVDF sealed housing for durability and long life. The sensor is well suited for a wide range of corrosive, sticky, or dirty type media. The Ranger Plus™ applications include pump control, bulk inventory, batch processing, water management, high/low-level alarms, and much more. To configure, monitor and data log your application, download the freelancer Plus™ software and purchase one RS-485 communication tool.

Features and benefits

  • Unaffected by optical factors like color and transparency
  • Computer (PC) software allows remote adjustment
  • Standard RS-485 Serial Interface
  • Durable housing for long life
  • Threaded at both ends
  • Optional Threaded Jam Nut in applications where no threaded fitting is available
  • Short & Overload protected I/O
  • Adjustable filters compensate for tank mixers or turbulence
  • Temperature compensation for improved accuracy
  • Adjustable sensitivity
  • 4.0” to 12.0” headband


Active Measuring Range

LTRP-10: 4” - 120”

LTRP-35: 12” - 420”

Case MaterialPVDF
Temperature-40 to 158 F (-40 - 70 C)
Humidity0 to 100% operating



Temperature Compensated




Digital: 0.0034” (0.086mm); Analog: 4099 steps (over full 0-10 VDC or 0-20 mA)





Greater of 0.03” (0.76mm) or 0.1% of target distance in stable environment



Update Rate


50 ms, software adjustable; affected by software filter selections


Input Power

10-30 VDC, 50 mA

maximum (not including output currents)


Voltage Output

0-10, 0-5 VDC or PC

customized; 10mA max. (*)



Current Loop #1

Current sourcing 4-20mA or PC

customized, max. loop 500W (*)


Current Loop #2

Current sinking 4-20mA or PC customized, max. loop 500W (*)



Sinking Switch

150 mA max. @ 40 VDC max., teachable set point & polarity, fault indication


Sourcing Switch

150 mA max. @ input voltage, teachable set point & polarity, fault indication


Max. Range

LTRP-10: 10 feet

LTRP-35: 35 feet


Process Mount

LTRP-10: 1.5 inches

LTRP-35: 2 inches




Ranger Plus™ Software



Stored in non-volatile memory
TransducerRugged piezoelectric





Download Datasheet: Ranger Plus™ LTRP Ultrasonic Level Transmitter (up to 35ft), Flocorp-Level Switches

Ref: Flo-corp.com

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