Assembled RTD

Key Features

• Operating Principle
• Main Technical Specifications
• Insulation Resistance at Room Temperature
• Typical terminal head types
• Typical mounting types
• Assembled RTDModel designation method
• Sensing element
• RTD (Resistance Thermometer)Element
• Thin-film surface platinum RTD element
• Inner-wound platinum RTD element
• Wiring method
• Sensing element
• Without fixing devicePlatinumRTD (Resistance Thermometer)
• : 1) Models 130 and 131 are waterproof, degree of protection IP55;
• Fixed-thread platinum RTD
• : 1) Models 230 and 231 are waterproof, degree of protection IP55;
• Loose-flange platinum RTD
• : 1) Models 330 and 331 are waterproof, degree of protection IP55;
• Fixed-flange platinum RTD
• : 1) Models 430 and 431 are waterproof, degree of protection IP55;
• : Flanges can be supplied as agreed with the user
• Fixed threadTaperedPlatinumRTD (Resistance Thermometer)
• : 1) Models 630 and 631 are waterproof, degree of protection IP55;
• Swivel unionPlatinumRTD (Resistance Thermometer)
• : 1) Models 53 and 53A are waterproof, degree of protection IP55;
• Straight unionPlatinumRTD (Resistance Thermometer)
• : 1) Models 73 and 73A are waterproof, degree of protection IP55;

Technical Specifications

The RTD is designed and manufactured on the principle that the resistance of a substance changes with temperature. The sensing part of an RTD is made of metal wire with a large temperature coefficient of resistance (such as platinum, nickel or copper wire) uniformly double-wound on a frame made of insulating material, or sprayed or printed with metal paste onto an insulating base plate. When a temperature gradient exists in the measured medium,

The measured temperature is the average temperature within the range where the sensing element is located.

Main features: wide measuring range, high measuring accuracy, long service life and convenient installation and use.

The types and tolerance classes of the assembled RTD are listed in Table 1

Table 1

● The outer diameter, length, material and thermal response time of the assembled RTD protection tube are listed in Table 2

Table 2

The insulation resistance of the assembled platinum RTD at room temperature shall be not less than 100 MΩ

The insulation resistance of the assembled platinum RTD at room temperature shall be not less than 10 MΩ, with a test voltage of 100±50 V DC

Simplified type (without terminal head) Waterproof terminal head Flameproof terminal head

The RTD element is one of the basic structures of a temperature measuring instrument and is divided into two categories: copper RTD elements and platinum RTD elements. Copper RTD elements cover a lower measuring range, while platinum RTDs cover a higher range with high accuracy and sensitivity.

The RTD element is a temperature sensor whose operating principle is that the resistance of the resistance wire changes under the effect of temperature. It can be used to measure temperatures in the range of -200 to 500 °C. Compared with thermocouples, its advantages include good electrical performance, a nearly linear temperature-resistance relationship, small deviation, and a deviation that remains negligible as service time increases.

The WZP series platinum RTD elements offer high accuracy, sensitivity and stability, with a compact structure, good reliability and short thermal response time. They are available as a series of products in multiple types and specifications, providing a new generation of quality products for the petroleum, chemical, power, light industry, machinery and scientific research sectors.

WZP-010、WZP-011

WZC-010A

WZP-035S、WZC-001

Note: ① Graduation numbers marked with “*” are supplied as special specifications,

②WZP-035S adopts the imported element WZP-014S, accuracy class: B.

WZPM-018

WZPM-0110

WZPM-2012

WZP-013S

WZP-014S

WZP-015S

WZP-203S

WZPM-205S

Single element wiring Dual element wiring

2) The protection tube material is 1Cr18Ni9Ti; other materials are supplied per agreement.

Waterproof, type 130 / 131 Waterproof, type 130G / 131G

2) The protection tube material is 1Cr18Ni9Ti; other materials are supplied per agreement

3) The nominal pressure is 10 MPa

Waterproof, type 230 / 231

Waterproof, type 230G / 231G

2) The protection tube material is 1Cr18Ni9Ti; other materials are supplied per agreement.

Waterproof, type 330G / 331G

2) The protection tube material is 1Cr18Ni9Ti; other materials are supplied per agreement,

3) The nominal pressure is 2.5 MPa.

Waterproof, type 430 / 431

Waterproof, type 430G / 431G

2) The protection tube material is 1Cr18Ni9Ti; other materials are supplied per agreement,

3) The protection tube bore adopts blind-hole technology,

4) The nominal pressure is ≤ 30 MPa.

Waterproof, type 630 / 630A

Waterproof, type 630 / 630A

2) Unless otherwise agreed, L is for reference only; the insertion length of the thermocouple shall equal the U dimension of the thermowell,

3) See page 123 for thermowell types.

2) Unless otherwise agreed, L is for reference only; the insertion length of the thermocouple shall equal the U dimension of the thermowell,

3) See page 123 for thermowell types.

Waterproof, type 53 / 53A

RTD installation diagram

Vertical pipe installation

Curved pipe installation

Inclined pipe installation method

Flange installation method

Straight connection head specification

Ordering & Inquiry

For selection guidance, specification confirmation or quotation, please call 0512-57892201, Mobile 13451695112, or submit an online order. Suzhou Dingluxuan Sensor Technology Co., Ltd. provides a complete matching service from temperature sensing elements to complementary ceramic insulation parts.

To order this product or get selection guidance, please call +86 512-57892201 or submit an online order.