• LPU-2127
  • Usually ships in 2-3 weeks



  • 1 to 25 ft. (0.3 to 7.6 m) detection range on liquids; 1 to 10 ft. (0.3 to 3 m) on solids
  • Accuracy: ±0.25% of detected range
  • Resolution: 0.1 in. (2.5 mm)
  • Loop powered 4-20 mA output
  • Integrated keypad and LCD display
  • 2-inch NPT mount
  • Beam Pattern: 9˚ off axis
  • Internal Temperature Compensation
  • Frequency: 69 kHz
  • IP65 environmental rating
  • Certifications:
    • CSA C/US
    • Class 1, Div. 2, Groups C & D
    • Class 1, Zone 2, AEx nA IIB T6


The APG LPU-2127 Level Sensor is a loop-powered ultrasonic level sensor with a range from 1 to 25 feet and Class 1, Div 2 certification. Designed for easy set-up, the LPU-2127 is loop-powered for faster, more efficient wiring and programming is done entirely through the integrated keypad, providing an easy interface eliminating the need for a computer. The sensor is virtually maintenance-free.

The LPU-2127 provides continuous level/distance measurements that are accurate to ±0.25% of detected range. Its durability, range, and simplicity make it a great sensor for many applications. With CSA hazardous location certification, and a durable housing with high chemical compatibility, the LPU-2127 ultrasonic sensor performs well under stress.


This product can be used in the following applications:

Here's how some of our customers use this product...

Treatment Plant Retrofit

The Background: Our customer is an automation company working on a project at a wastewater treatment plant which requires the replacement of an older ultrasonic level sensor.

The Problem: The application is a wet well for a lift station. A pressure sensor inside the wet well is used for primary measurement, with the current ultrasonic level sensor used as secondary confirmation. It’s important to have two readings because overflow/leakage would be a violation of the operating permit for the treatment plant resulting in fines.

The Solution: The customer chose the APG LPU-2127, a US-made ultrasonic level sensor which has the reliability, range and accuracy for the application while offering Class 1, Div 1 certification.