Sierra Oil Pressure Switch OP22891, 15 PSI Normal Closed, 1/8 Inch - 27 Thread

The Sierra OP22891 is an optional oil pressure switch rated at 15 PSI with a normal closed contact design, built for marine engine oil pressure monitoring applications. It uses a 1/8 inch - 27 thread for installation into the engine oil galley or block port. As a normal closed switch, it maintains a closed circuit under normal operating oil pressure and opens (or changes state) when the set pressure point is reached, which is used to trigger a warning light, buzzer, or gauge circuit in the boat's engine monitoring system.

This switch is designed as an alternative pressure setting option alongside other Sierra oil pressure switches, giving boat builders and engine rebuilders a choice of trip point to match the monitoring requirements of a given engine setup. It is a compact, direct-replacement style component intended for straightforward installation into an existing threaded oil pressure port.

Specifications

• Brand: Sierra
• Manufacturer Part Number: OP22891
• Product Name: Oil Pressure Switch
• Pressure Rating: 15 PSI
• Switch Type: Normal closed
• Thread Size: 1/8 inch - 27
• Weight: 0.31 pounds
• Category: Engine Parts

Frequently Asked Questions

What pressure does the Sierra OP22891 oil pressure switch trigger at? The Sierra OP22891 is rated for 15 PSI, meaning it responds at that oil pressure point.

Is the OP22891 a normal open or normal closed switch? It is a normal closed switch, so the circuit stays closed under normal oil pressure conditions.

What thread size does this oil pressure switch use? The OP22891 uses a 1/8 inch - 27 thread for installation into the engine's oil pressure port.

How much does the Sierra OP22891 weigh? This oil pressure switch weighs 0.31 pounds.

What is the OP22891 used for? It functions as an oil pressure switch that monitors engine oil pressure and can trigger a warning light, buzzer, or gauge circuit when the 15 PSI set point is reached.

Is the OP22891 described as an optional switch? Yes, the Sierra OP22891 is designated as an optional oil pressure switch, offering a 15 PSI setting as an alternative to other available pressure ratings.

What category of part is the OP22891? The OP22891 is categorized as an engine part, specifically an oil pressure switch.

Does the OP22891 come with mounting hardware or wiring? The available specifications for the OP22891 cover the switch itself, its 15 PSI rating, normal closed operation, and 1/8 inch - 27 thread; no additional included hardware is specified.

Can the OP22891 be used with a warning buzzer or light? As a normal closed oil pressure switch, the OP22891 is designed to work in circuits such as warning lights or buzzers that respond to a change in oil pressure state.