Amphenol Rochester Sensors S28x Capacitance Coolant Level Switches
Amphenol Rochester Sensors S28x Capacitance Coolant Level Switches are active devices designed to give an alarm signal if liquid falls below or rises above a preset level. These can be specified with a delay to eliminate false alarms due to turbulence. Containing a factory-programmable microprocessor, the switches offer sink-to-ground, source-voltage, or both outputs on separate pins.
The Amphenol Rochester Sensors S28x Capacitance Coolant Level Switches have a small footprint with limited intrusion into the tank, which reduces the risk of damage, and a wide range of customer-specifiable options make it suitable for most applications.
Features
- Capacitance-type coolant switches are solid-state, so no moving parts to stick or jam
- Protect engines from damage due to a lack of coolant
- Designed, developed, tested, and approved for use in highly demanding OEM applications
Applications
- Engine coolant monitoring (protects engines by detecting low or high coolant levels)
- Commercial vehicles (approved for demanding OEM applications)
- Off‑highway and industrial engines (reliable coolant level protection in harsh environments)
- Generator sets and power equipment (coolant level alarms to prevent overheating damage)
- Systems with turbulence (optional delay reduces false alarms caused by fluid movement)
Additional Resources
Typical Applications
Dimensions
Published: 2026-02-06
| Updated: 2026-02-09