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Introduction
Thank you for purchasing a LPU-2127 ultrasonic sensor from APG. We appreciate your business! Please take
a few minutes to familiarize yourself with your LPU-2127 and this manual.
The LPU-2127 loop-powered ultrasonic sensor provides a low-power, non-contact level measurement
solution rated for hazardous locations and suitable for harsh chemical environments. It offers a built-in
keypad and four digit LCD display for easy setup, and a NEMA 4X cover for outdoor applications.
Reading your label
Every APG instrument comes with a label that includes the instrument’s model number, part number, serial
number, and a wiring pinout table. Please ensure that the part number and pinout table on your label
match your order. The following electrical ratings and approvals are also listed on the label. Please refer to
the Certificate of Compliance at the back of this manual for further details.
Electrical ratings
Input: 12 to 28 Volts DC; Output: 4-20mA
Class I Division 2; Groups C, D T6
Class I, Zone 2, Group IIB
AEx nA IIB T6: Ta: -40°C to 60°C; IP65
Ex nA IIB T6: Ta: -40°C to 60°C; IP65
IMPORTANT
: The LPU-2127 must be installed as shown on drawing 9002745 to meet
listed approvals. Faulty installation will invalidate all safety approvals and ratings.
