The Centroid Products CGFP-29-WS-12V-10/180 is a commercial-grade, capacitance-based liquid level sending unit engineered specifically for potable water tanks in marine, RV, and fleet applications. Driven by an integrated microcontroller, this 29-inch solid-state probe eliminates the mechanical floats, levers, and moving parts that traditionally jam or corrode in harsh mobile environments.Designed to seamlessly interface with industry-standard telemetry, it actively monitors water column height and converts the physical capacitance into a precise 10 to 180 Ohm electrical resistance output. It comes standard with a Teflon-jacketed sense wire housed inside a protective PVC tube to guarantee clean, accurate, and hygienic tracking of freshwater reserves.

• Brand: Centroid Products
• Part Number: CGFP-29-WS-12V-10/18
• Type: Programmable electronic liquid-level sending unit
• Application: Potable/fresh water
• Nominal probe length: 29 inches — your “28″” description may refer to the usable/sensing length or tank depth; I would not advertise it as exactly 28" without confirming the physical measurement.
• Supply voltage: 12 VDC
• Output: 10–180 Ω
• Water probe construction: PVC outer tube with an insulated sensing wire and an external ground wire
• Mounting: Centroid water senders are available with different mounting configurations; the exact mounting style should be confirmed from the physical unit/label.
• Water compatibility: Designed specifically for potable water. Centroid states that saltwater, wastewater, rusty water, and other non-potable liquids can leave deposits on the sensing wire and cause inaccurate readings.

We recently acquired a large inventory of overstock items. These items are missing the manufacturer's original packaging and may have minor cosmetic blemishes from storage.