Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Civacon · Probes & Sensors
5650U-18
In stock · ships from Knoxville
This is an 18-inch CivaStar optical overfill sensor probe for tank trucks.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Designed for tank trailers and trucks carrying gasoline and similar fuels. While not tied to one truck make/model, it is specific to 2-wire overfill probe systems; verify your vehicle's probe wiring and tank mounting before purchase.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 2 of 2.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It uses a two-wire gray/gray connection to detect liquid levels and prevent overfilling when loading or unloading petroleum products like gasoline. The probe includes built-in LED diagnostics for quick troubleshooting and serves as a direct replacement for older-style probes without requiring height resets. It’s built with an aluminum shaft, silicone seals, and a plated steel locking nut for durability in hazardous environments.
Part Number: 5650U-18
18 PROBE
Category: Probes
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more