NAGANO KEIKI KH55 KH55-244X Product Description

Overview

NAGANO KEIKI KH55 KH55-244X is a Nagano Keiki KH55 series pressure transmitter, also described in distributor records as a pressure sensor or transmitter-gauge combination for industrial pressure measurement. The KH55 family converts measured process pressure into a standard analog electrical signal for transmission to PLC, DCS, indicator, recorder or monitoring equipment. The KH55-244X suffix encodes the specific pressure range, process connection, electrical connection, material or option configuration for the unit; public Nagano Keiki catalog data for this exact suffix was not available, so pressure range, connection thread and accuracy should be verified against the transmitter nameplate or original calibration record before replacement.

Features

The public distributor records for KH55 units identify the product family as a pressure transmitter powered by 24 V DC, with a standard 4 to 20 mA DC output and a maximum connected load of 500 Ω. KH55 units are listed in several pressure ranges, including 0 to 1.5 MPa, 0 to 2 MPa, 0 to 35 kgf/cm², 0 to 10 MPa, and a compound range of -76 cmHg to 2 kgf/cm², depending on the ordered suffix. The KH55-244X suffix itself is not matched to one confirmed range in public sources; the exact range and maximum pressure for this unit must be read from the device label.

Based on the KH55 family and similar Nagano Keiki pressure transmitters, the transmitter uses a semiconductor pressure sensing element to convert pressure into an analog signal, typically in a two-wire DC loop arrangement. The housing includes a pressure process port and electrical connection for the DC supply and 4 to 20 mA signal loop. Accuracy, wetted material, diaphragm material, ambient temperature range, vibration resistance, enclosure protection and cable or connector type for KH55-244X require confirmation from the original Nagano Keiki nameplate, calibration certificate or equipment manual.

Specs

Brand: NAGANO KEIKI, Nagano Keiki Seisakusho Co., Ltd. Series: KH55Model: KH55-244XProduct type: Pressure transmitter, industrial pressure sensor Signal family: Standard 4 to 20 mA DC analog output on listed KH55 units Supply family: 24 V DC on listed KH55 units Maximum load: 500 Ω per distributor KH55 records Process connection: Unconfirmed for KH55-244X, verify nameplate or manual Pressure range: Unconfirmed for KH55-244X; KH55 family listings include 0 to 1.5 MPa, 0 to 2 MPa, 0 to 10 MPa and other ranges Maximum pressure: Unconfirmed for KH55-244X Accuracy: Unconfirmed for KH55-244X Wetted and diaphragm materials: Unconfirmed for KH55-244X Electrical connection: Unconfirmed for KH55-244X Ambient temperature and protection rating: Unconfirmed for KH55-244X Product status: Nagano Keiki KH55 replacement pressure transmitter spare for existing process instrumentation installations

Principle

A KH55 pressure transmitter measures the pressure applied to its process port through the sensing diaphragm or pressure element. The sensing element converts the pressure force into an electrical signal, which the transmitter electronics condition and scale into a standard 4 to 20 mA DC loop signal. A two-wire loop typically carries both the DC supply power and the analog current signal; the current level corresponds to the measured pressure, so a PLC or indicator can interpret the 4 mA and 20 mA endpoints as the calibrated low and high pressure range.

The receiver or PLC measures the loop current across a load resistor and converts it back to a pressure value. Correct replacement depends on matching the calibrated pressure range, supply voltage, load resistance, output signal, process connection, wetted material, electrical connection and mounting orientation to the original installation. If the suffix represents a special range, material or hazardous-area option, the original calibration data and nameplate should be used before installing the spare in a safety or process-control loop.

Applications

NAGANO KEIKI KH55 KH55-244X is intended for industrial pressure monitoring in hydraulic and pneumatic systems, pumps, compressors, pipelines, tanks, process equipment, machine tools, packaging machinery, water and wastewater, utilities, chemical processing, power systems, marine or auxiliary equipment, and general plant instrumentation. It transmits continuous pressure measurements to control or monitoring systems for process control, alarm indication, flow or level monitoring, equipment protection and maintenance supervision. In existing KH55 transmitter installations, the unit serves as a replacement pressure instrument spare when the original range, connection and loop configuration are verified.