This 18" single pole hi-limit sensor (275-3148-00) is a genuine Robertshaw safety component designed for hot tubs and spas equipped with Eaton heating systems. The sensor features an 18-inch capillary tube with a 5/16-inch bulb, providing precise temperature monitoring to prevent overheating conditions that can damage your spa equipment or create unsafe water temperatures.
As an OEM replacement part, this hi-limit sensor delivers exact fit performance you can trust. We guarantee proper fitment and back every sensor with our comprehensive 1-year warranty. Most orders ship same day, getting your spa back to safe operation quickly. The single pole design simplifies wiring connections during installation. Verify your existing sensor's capillary length and bulb diameter before ordering to ensure proper replacement – this sensor's 18-inch reach and 5/16-inch bulb must match your spa's original specifications for safe, reliable operation.