Product Overview
The Nakakita NS-290 is a mechanical pressure switch used to initiate an electrical alarm, shutdown or control command when system pressure reaches its adjusted setpoint.
The photographed unit is identified as the exact NS-290 model and is intended for high-pressure marine or industrial hydraulic service.
Technical Specifications
| Product information | Details |
|---|---|
| Manufacturer | Nakakita Seisakusho Co., Ltd. |
| Model | NS-290 |
| Product type | Mechanical high-pressure switch |
| Maximum pressure | 300 kgf/cm² |
| Approximate equivalent | 294 bar |
| Scale marking | 0–30 kgf/cm² with ×10 multiplier |
| Maximum switching voltage | 220 V |
| Pressure sensing | Mechanical pressure element |
| Electrical function | Opens or closes contacts at the adjusted pressure |
| Local adjustment | Internal setpoint mechanism |
| Approximate weight | 3.06 kg |
| Typical medium | Hydraulic oil or another compatible pressure fluid |
| Typical applications | Hydraulic power units, pumps and marine machinery |
| Electrical supply | Not required for pressure sensing |
| Replacement checks | Setpoint range, contact action, rating, connection and fluid compatibility |
Product Description
Process pressure acts on the switch’s internal sensing mechanism. When pressure reaches the selected setting, the electrical contacts change state, producing an alarm or controlling connected machinery.
The published 300 kgf/cm² value is the unit’s maximum-pressure marking, while its adjustment scale is marked 0–30 with a ×10 multiplier. The precise operating setpoint and contact action should be confirmed from the original unit before replacement.
