NAGANO KE-22 Marine Pressure Transmitter Complete Assembly

Manufacturer

Nagano Keiki Co., Ltd.

Country of Origin

Japan

Product Type

Marine Pressure Transmitter / Pressure Sensor / Pressure Monitoring Assembly

Marine Application

• Main Engine
• Auxiliary Engine
• Boiler System
• Hydraulic System
• Fuel Oil System
• Lubricating Oil System
• Cooling Water System
• Marine Automation System
• Alarm & Monitoring System
• Engine Safety System

Product Introduction

Modern marine engines rely on highly accurate pressure monitoring to ensure safe and efficient operation. One of the most trusted solutions in marine automation is the NAGANO KE-22 Pressure Transmitter, designed by Nagano Keiki, Japan.

The KE-22 converts mechanical pressure into an electrical signal that can be transmitted to engine monitoring systems, alarm panels, automation controllers, or safety shutdown systems. It is widely installed on merchant ships, tankers, offshore vessels, LNG carriers, container ships, and bulk carriers because of its long-term stability, rugged construction, and high measurement accuracy.

Its stainless-steel sensing assembly, remote capillary connection, and durable marine-grade construction make it ideal for harsh engine-room environments where vibration, temperature, humidity, and pressure fluctuations are common.

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What is the NAGANO KE-22?

The NAGANO KE-22 is a precision pressure measuring device that continuously monitors fluid or gas pressure inside marine systems.

Instead of displaying pressure locally only, the transmitter converts the measured pressure into a standardized electrical output that can be read remotely by:

• AMS (Alarm Monitoring System)
• Engine Control System
• PLC
• Governor System
• Engine Safety System
• Data Logger
• Integrated Automation System (IAS)
• Remote Monitoring Panel

This allows engineers to monitor critical engine conditions from the Engine Control Room (ECR) or bridge without manually checking pressure gauges.

Working Principle

The KE-22 operates using a precision pressure sensing element.

The process pressure enters the sensing chamber through the pressure port. The sensing diaphragm deflects proportionally to the applied pressure. Internal electronics convert this movement into an electrical signal, typically a standard industrial output such as 4–20 mA or another configured signal depending on the installation.

The transmitted signal is continuously monitored by the vessel's automation system. If pressure exceeds safe limits or drops below preset thresholds, alarms or protective shutdown functions may be activated automatically.

Main Components

The complete NAGANO KE-22 assembly generally includes:

• Pressure transmitter
• Stainless steel sensing chamber
• Flexible armored capillary tube
• Pressure connection fittings
• Mounting bracket
• Electrical connection terminal
• Pressure isolation components
• Calibration adjustment mechanism
• Signal conditioning electronics

Each component is designed for long-term reliability in marine service conditions.

Key Features

• High measurement accuracy
• Marine-grade stainless steel construction
• Excellent vibration resistance
• Long service life
• Stable output signal
• Compact design
• Corrosion-resistant housing
• High temperature tolerance
• Low maintenance requirements
• Suitable for continuous operation
• Excellent long-term calibration stability
• Reliable performance in engine-room environments
• Compatible with most marine automation systems

Marine Applications

The NAGANO KE-22 is commonly used for monitoring:

• Fuel Oil Pressure
• Lubricating Oil Pressure
• Hydraulic Oil Pressure
• Cooling Water Pressure
• Jacket Water Pressure
• Control Air Pressure
• Boiler Steam Pressure
• Pump Discharge Pressure
• Compressor Pressure
• Turbocharger Systems
• Engine Safety Systems
• Alarm Monitoring Systems
• Automation Panels

It is suitable for installation on:

• Bulk Carriers
• Oil Tankers
• Chemical Tankers
• LNG Carriers
• LPG Ships
• Offshore Support Vessels
• Container Ships
• Ro-Ro Vessels
• Passenger Ships
• Naval Vessels

Compatible Marine Systems

The KE-22 transmitter can interface with many marine automation platforms, including:

• Nabtesco Governor Systems
• Nabco Engine Control Systems
• Kongsberg Automation
• Lyngsø Marine Systems
• JRCS Automation
• Yanmar Engine Monitoring
• MAN B&W Engine Systems
• Wärtsilä Automation
• Sulzer Engine Control
• Daihatsu Engine Monitoring
• Mitsubishi Marine Engine Systems
• Kawasaki Marine Equipment
• Various PLC- and IAS-based marine automation systems

Common Problems & Troubleshooting

Preventive Maintenance

To maximize service life:

• Inspect electrical connections regularly.
• Check capillary tubing for leaks or mechanical damage.
• Verify calibration during scheduled maintenance.
• Keep pressure ports clean.
• Protect against excessive vibration.
• Confirm insulation resistance.
• Replace worn sealing components.
• Record pressure trends for predictive maintenance.

Why Ships Still Use the NAGANO KE-22

Despite newer digital sensors entering the market, the KE-22 remains popular because of:

• Proven Japanese reliability
• Long operational life
• Accurate pressure measurement
• Excellent spare parts availability
• Compatibility with legacy automation systems
• Low maintenance costs
• Easy calibration
• High resistance to harsh marine environments

Frequently Asked Questions (FAQ)

Q1. What is the primary function of the NAGANO KE-22?
It measures process pressure and transmits an electrical signal to marine monitoring and automation systems.

Q2. Can it be recalibrated?
Yes. The KE-22 is designed for periodic calibration to maintain measurement accuracy.

Q3. Is it suitable for hydraulic systems?
Yes. It is commonly used for hydraulic, fuel oil, lubricating oil, and cooling water pressure monitoring.

Q4. Does SM MARINE SERVICE™ supply complete assemblies?
Yes. We can supply complete assemblies, replacement units, and selected spare parts subject to stock availability.

Q5. Can used or reconditioned units be supplied?
Yes. Depending on customer requirements and stock, both new and professionally reconditioned equipment may be available.

Short Product Description

The NAGANO KE-22 Marine Pressure Transmitter is a high-precision Japanese pressure sensing device used in marine engine monitoring and automation systems. It provides accurate and reliable pressure measurement for critical shipboard applications, ensuring safe engine operation and dependable alarm monitoring.

User Manual & Technical Resources

For installation instructions, wiring details, calibration procedures, and maintenance guidance, consult the original Nagano Keiki KE-22 technical manual, ship automation documentation, and engine manufacturer service manuals applicable to your vessel's installation.

SM MARINE SERVICE™

SM MARINE SERVICE™ supplies New, Reconditioned, and Tested marine automation equipment and spare parts for customers worldwide.

Our Services

• Worldwide Supply
• Marine Automation Spare Parts
• Sourcing & Procurement
• Repair & Overhaul
• Calibration Services
• Technical Support
• Replacement Components
• Emergency Marine Supply

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Samir Market, DT Road, Pahartali, Beside CDA Market, Chattogram, Bangladesh

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Website: www.smmarineservice.com
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