NAGANO KE-21
NAGANO KEIKI Co., Ltd.
Refurbished
The NAGANO KE-21 / KE21 Pneumatic Pressure Transmitter, manufactured by Nagano Keiki, is a force-balanced pneumatic transmitter designed to detect process pressure and transmit a proportional pneumatic signal to a remote receiver or control system.
Official Nagano Keiki documentation describes the KE21 as capable of detecting pressure, liquid level or differential pressure and converting the measured value into a 20–100 kPa constant air-pressure signal. Its pneumatic operating principle also makes it suitable for applications involving explosive or corrosive atmospheres.
Manufacturer: NAGANO KEIKI
Model: KE21 / KE-21 / KE 21
Product Type: Pneumatic Pressure Transmitter
Country of Origin: Japan
Operating Principle: Force-Balanced Pneumatic Transmission
Standard Transmitted Air: 20–100 kPa
Typical Marine Application: Pressure monitoring, cargo pump systems, machinery instrumentation and pneumatic control systems
Nagano Keiki states that the force-balance construction minimizes movement of the pressure element and linkage, contributing to shock resistance, linearity, hysteresis performance and long-term accuracy. External zero adjustment is also provided.
The KE21 is particularly relevant to older and existing vessels that continue to use dependable pneumatic instrumentation.
Marine spare-parts documentation specifically identifies KE-21 applications for cargo pump suction and discharge pressure measurement, including vacuum/compound and positive-pressure ranges.
Typical applications can therefore include:
Published KE21 examples show different input ranges, including -76 cmHg to positive pressure ranges and 0–25 kg/cm² configurations, while the pneumatic output is commonly documented as 0.2–1 kg/cm² / 20–100 kPa. The exact nameplate range must always be matched when replacing a unit.
Many existing vessels were designed around pneumatic control and monitoring systems. Replacing a KE21 with the correct specification can preserve the original:
Pressure sensing → Pneumatic transmission → Remote receiver / control-room indication
without redesigning the complete instrumentation system.
For replacement, buyers should confirm:
Model • Pressure Range • Supply Air • Transmitted Air • Connection • Serial/Identification Number • Existing Installation
Check the supply-air pressure, pneumatic tubing, blocked fittings and internal transmitter condition.
Verify that the replacement unit has the correct input-pressure range. Zero adjustment and calibration should also be checked.
Inspect for air leakage, loose fittings, unstable supply pressure or mechanical problems within the pneumatic mechanism.
Check pneumatic tubing and pressure connections for restriction, contamination or blockage.
Inspect tubing, fittings, connections and sealing points before condemning the complete transmitter.
Because KE21 units exist with multiple measuring ranges, calibration should always be performed against the specification shown on the individual nameplate.
SM MARINE SERVICE™ supports marine customers searching for:
NAGANO KE21 Complete Pneumatic Pressure Transmitter • KE-21 Replacement Unit • Pressure Gauge/Indication Components • Pneumatic Fittings • Tubing • Pressure Connections • Related NAGANO Instrumentation • Marine Pressure Transmitters
Depending on stock and customer requirements, equipment may be available as:
New • Used • Tested Working • Refurbished • Reconditioned
For faster quotation, send the complete nameplate photograph, pressure range, required quantity and existing unit photographs.
SM MARINE SERVICE™ also lists the related NAGANO KE-22 Marine Pressure Transmitter.
KE21 and KE22 should not automatically be treated as interchangeable; the operating principle, range, connections and complete application specifications should be verified before replacement.
NAGANO KE-22 Marine Pressure Transmitter – SM MARINE SERVICE™
Your existing NAGANO KE-21 product page can also be internally linked from this article:
NAGANO KE-21 Pneumatic Pressure Transmitter – SM MARINE SERVICE™
This creates a useful KE21 ↔ KE22 pressure-instrumentation SEO cluster on the website.
Customers sourcing a NAGANO KE21 often also require other hard-to-find marine automation, pressure-control, safety and environmental monitoring equipment.
A marine oil-content monitoring and bilge-alarm system used with Oil Water Separator installations.
Fellow Kogyo FOCAS-1500C Bilge Alarm – SM MARINE SERVICE™
Sasakura SK-101 Salinity Indicator – SM MARINE SERVICE™
BilgMon 488 15 PPM Bilge Alarm – SM MARINE SERVICE™
JOWA SeaGuard 15 PPM Bilge Alarm – SM MARINE SERVICE™
TERASAKI WE300 Watch-Free System – SM MARINE SERVICE™
VISATRON VN116/87 Plus Oil Mist Detector System – SM MARINE SERVICE™
DECKMA OMD-2008 – SM MARINE SERVICE™
Nakakita NS-TB732 Temperature Controller – SM MARINE SERVICE™
These internal links connect the KE21 article with related marine instrumentation, automation, machinery monitoring, engine-room safety and environmental monitoring equipment already available on the SM MARINE SERVICE™ website.
The NAGANO KE21 is a force-balanced pneumatic transmitter used to detect pressure, liquid level or differential pressure and transmit a corresponding pneumatic signal.
It is manufactured by Nagano Keiki Co., Ltd. Nagano Keiki of Japan.
Nagano Keiki specifies a 20–100 kPa pneumatic transmitted signal for the KE21.
Yes. Marine spare-parts references document KE21 transmitters for shipboard applications including cargo-pump suction and discharge pressure monitoring.
No. Multiple pressure ranges are documented. The existing unit's nameplate must be checked before ordering a replacement.
SM MARINE SERVICE™ supports worldwide sourcing and supply of NAGANO KE21 pneumatic pressure transmitters and related marine instrumentation, subject to stock availability.
Depending on available stock, new, used, tested, refurbished or reconditioned marine equipment can be sourced.
The NAGANO KE-21 / KE21 Pneumatic Pressure Transmitter is a Japanese force-balanced pressure instrument designed to convert measured pressure into a proportional pneumatic output signal for remote monitoring and control. Used in marine and industrial installations including cargo-pump pressure monitoring and pneumatic control systems, the KE21 remains important for vessels maintaining legacy instrumentation. SM MARINE SERVICE™ supports worldwide supply of NAGANO KE21 transmitters and related marine spare parts.
NAGANO KEIKI KE21 Pneumatic Transmitter – Official Product Page
The official manufacturer page provides the KE21 working principle, features and access to catalog/outline-drawing resources.
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Stock Location:
• Bangladesh • China
Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
0
BDT 0
BDT 0
BDT 0
BDT 0
Marine Equipment Supplier