Fixed-flange thermoresistors

Fixed-flange thermoresistors are mounted directly to equipment via flange welding or bolted connections, ensuring secure attachment and excellent sealing. They are ideally suited for temperature measurement in medium-pressure pipelines, reaction vessels, and internal container applications.

Classification:

Thermal resistor

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Fixed-flange thermoresistors

1. Overview of Fixed-Flange Thermistors

Typically used in conjunction with indicating instruments, recording instruments, electronic controllers, and the like. It directly measures the temperature of liquid, steam, and gaseous media, as well as solid surfaces, within the range of -200°C to 500°C in various industrial processes.

2. Working Principle of Fixed Flange Thermoresistors
A thermoresistance measures temperature by exploiting the property that the electrical resistance of a material changes with temperature. When the resistance value varies, the measuring instrument displays the corresponding temperature.
3. Applications of Fixed Flange Thermoresistors
Assembly-type resistance thermometers are typically used together with indicating instruments, recording instruments, electronic controllers, and similar devices. They directly measure the temperature of liquids, steam, and gaseous media, as well as solid surfaces, within the range of -200°C to 500°C in a variety of production processes.

4. Features of Fixed Flange-Type Thermal Resistances
a. Spring-loaded temperature-sensing element, offering excellent vibration resistance;
b. No compensation leads required, reducing costs;
c. High measurement accuracy;
d. High mechanical strength and excellent pressure resistance;
e. Uses imported thin-film resistor elements, ensuring reliable and stable performance.
5. Main Technical Parameters of Fixed Flange-Type Thermal Resistances
Product Compliance Standards
     IEC751
     JB/T18622-1997
     JB/T8623-1997
6. Insulation Resistance of Fixed Flange Thermocouples at Room Temperature
The thermal resistance shall have an insulation resistance of >100 MΩ between the electrode and the outer sheath when tested at an ambient temperature of 15–35°C, with relative humidity not exceeding 80%, and under a test voltage of 10–100 V (DC).
7. Measurement Range and Tolerance of Fixed Flange Thermocouples

Model Number	Temperature Scale	Temperature Measurement Range	Accuracy Class	Permissible Error
WZP	Pt100	-200-+500	A grade	±（0.15+0.002） ltl
WZP	Pt100	-200-+500	B grade	±（0.30+0.005） ltl
WZC	Cu50 Cu100	-50-+100	---	±（0.30+0.005） ltl

8. Selection Table for Flanged Thermoresistors

Product Model	Thermocouple Type	Temperature Range ℃	Thermal Response Time	Dimensions (mm)
				d	L x l
WZP-420 WZP2-420	Pt100	-200—500	<90S	φ16	300x150 350x200 400x250 450x300 500x350 650x500 900x750 1150x1000 1650x1500 2150x2000
WZP-420G WZP2-420G			<24S
WZP-421 WZP2-421			<45S	φ12
WZP-421G WZP2-421G			<24S
WZP-430 WZP2-430			<90S	φ16
WZP-430G WZP2-430G			<24S
WZP-431 WZP2-431			<45S	φ12
WZP-431G WZP2-431G			<24S
WZC-420G	Cu50 Cu100	-50—100	<120S	φ16
WZC-420			<40S
WZC-430			<120S
WZC-430G			<40S
WZC-421			<120S	φ12
WZC-421G			<40S
WZC-431			<120S
WZC-431G			<40S

Other relevant technical parameters can be customized according to the user’s specifications, such as length, connection type, single-element or dual-element configuration, etc.

Fixed Threaded Conical Thermoresistor

Active threaded pipe joint type thermistor