Low Water Pressure Sensor for Keston Logic Combi Boiler 505.91512

The Low Water Pressure Sensor (Part 505.91512) is a premium‑grade replacement designed for Keston Logic Combi boilers and a wide range of Ideal models. This compact safety switch continuously monitors water pressure inside the heating circuit and automatically shuts the boiler down if pressure falls below safe limits, protecting the heat exchanger from overheating and preventing costly damage.

Key benefits
– Immediate shutdown when pressure drops below 0 bar, avoiding unsafe operation.
– Accurate detection across a 0‑4 bar (0‑400 kPa) range, with overload protection up to 8 bar (800 kPa).
– Easy installation – dimensions 68 mm × 35 mm fit the original mounting points.

Technical specifications
– Input voltage: 5 V DC
– Output signal: 0.5‑2.5 V
– Pressure range: 0‑4 bar (0‑400 kPa)
– Max overload: 8 bar (800 kPa)
– Length: 68 mm | Width: 35 mm

Compatible boiler series (selected):
Ideal C24, C30, C35, C26 Combi, C32 Combi, Logic + Combi 24/30, Logic Combi 35, Ultra System 15/30, and many other Ideal and Keston models listed in the full compatibility chart.

Replace the original sensor with confidence—this part meets OEM performance standards while offering a cost‑effective solution for maintaining boiler safety and efficiency.