Meiyo Electric PTR-MB Platinum Resistance Bulb — Low-Temperature Bearing Measurement

Introduction

Meiyo Electric PTR-MB is a low-temperature platinum resistance bulb designed for bearing temperature measurement. The manufacturer identifies PTR-MB as a Pt100Ω, three-wire sensor with cable and terminal box, intended for bearing systems.

For replacement procurement, the model designation should be confirmed together with the resistance element, accuracy class, temperature range, protecting-tube diameter, mounting plug and installed configuration. These parameters are relevant when evaluating compatibility with an existing sensor installation.

Meiyo Electric PTR-MB Pt100 Platinum Resistance Bulb with Terminal Box and Cable, Ideal for Low-Temperature Bearing Measurements.

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Technical Overview: Meiyo Electric PTR-MB Platinum Resistance Bulb

The PTR-MB is part of Meiyo Electric's low-temperature platinum resistance bulb range. Its construction is intended to provide suitable thermal response for low-temperature monitoring applications, with the manufacturer emphasizing heat conductivity of the resistance element as an important design consideration.

Technical Item	Meiyo Electric PTR-MB Specification
Product Category	Low-temperature platinum resistance bulb
Model	PTR-MB
Primary Application	Bearing system
Nominal Resistance	Pt100Ω at 0°C
Current	2 mA
Accuracy Class	Class B
Operating Temperature	0 to 100°C
Standard Tube Material	SUS304
Connection	3-wire
Protecting Tube	Single
Terminal Type	Terminal box
Diameter φD	4.8, 10 or 12 mm
Attached Plug	G1/2, G3/4, M24 or M33
Configuration	Cable and terminal box

The applicable combination of diameter, mounting plug and installation details should be verified against the existing sensor specification or original drawing before replacement.

Industrial Application

Meiyo Electric identifies the PTR-MB specifically for bearing temperature measurement. More broadly, its low-temperature platinum resistance bulb range is used for monitoring lubricating oil, cooling water, ship-engine bearings and air temperature.

For an existing PTR-MB installation, the actual application and mounting arrangement should be confirmed rather than assuming interchangeability based only on the Pt100 element.

Identification / Replacement Considerations

When evaluating an existing Meiyo Electric PTR-MB for replacement, verify:

• Manufacturer and exact model: PTR-MB

• Existing nameplate or identification

• Copy of the original drawing, when available

• Pt100Ω resistance element

• Class B accuracy

• 3-wire configuration

• Protecting-tube diameter

• Insertion / installation dimensions

• Attached plug size and thread

• Cable and terminal-box arrangement

• Operating temperature

• Bearing measurement point / installation

• Quantity

A Pt100 sensor should not be considered a direct replacement solely because its nominal resistance is identical. Mechanical configuration, wiring, dimensions, mounting connection and temperature requirements must also correspond to the installed sensor.

Engineers evaluate the Meiyo Electric PTR-MB platinum resistance bulb for precise bearing temperature measurement.

Information Recommended for Quotation

For a Meiyo Electric PTR-MB RFQ, provide the exact model designation and a copy of the original drawing whenever available.

If complete identification is unavailable, provide clear photographs of the sensor, terminal box and identification markings together with the protecting-tube diameter, insertion dimensions, attached plug, cable arrangement, operating temperature, application and quantity.

This information allows the existing PTR-MB configuration to be reviewed before quotation feasibility is evaluated.

Nichiboku Support

Nichiboku supports international sourcing and supply of identifiable Japanese industrial and marine instrumentation, including Meiyo Electric temperature and measurement products for replacement requirements.

Technical evaluation is based on the installed equipment information and required configuration. Providing the exact model, copy of the original drawing, sensor dimensions, mounting details and operating conditions helps reduce identification uncertainty and supports a technically qualified RFQ.

Meiyo Electric — Nichiboku Tech https://www.nichiboku.com/japanese-industrial-products/meiyo-electric

For additional Japanese industrial manufacturers and product categories:

Nichiboku Tech — Virtual Product Catalogue https://www.nichiboku.com/japanese-industrial-products

For replacement or procurement evaluation, provide the manufacturer, exact model number, copy of the original drawing or nameplate, technical specifications, quantity and required quotation deadline.

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