Assembly Thermal Resistance WZP-420 WZP-421

 

Assembly Thermal Resistance WZP-420 WZP-421 Brief Description

WZP series Assembly Thermal Resistance WZP-420 WZP-421 is PT100, Fixed flange,splash proof type,Assembly Thermal Resistance WZP-420 WZP-421 is used as a sensor to measure temperature, usually matched with display instruments, recording meter and electronic computer. Assembly Thermal Resistance WZP-420 WZP-421 can directly measure temperature from -200℃ to 500℃ of liquid, vapor, gas medium and solid surface during various production processes. Our factory product two categories assembly-type, unified design type thermal resistance: Pt100 as per IEC and Cu50 as per Professional norm degree. In addition, Assembly Thermal Resistance WZP-420 WZP-421 has the advantages of simple assembly, convenient replacement, pressure spring type temperature sensing element, good anti-vibration, wide measuring range, high mechanical strength, good pressure durability.

 

Assembly Thermal Resistance WZP-420 WZP-421 Working principle

Assembly Thermal Resistance WZP-420 WZP-421 measures temperature using the property that its resistance value changes with temperature. Temperature sensing element of Assembly Thermal Resistance WZP-420 WZP-421 is made of metal wire twining insulation in pairs equably. When there is temperature gradient in measured medium, the measured temperature is average temperature of the medium where the scope of sensing element in.

Junction box, protective tube, insulated casing, termals and thermal electodes form a basic structure of assembly-type thermocouple, with a variety of installation of fixtures.

 

Assembly Thermal Resistance WZP-420 WZP-421 Main technical parameter

Product standard

IEC751JB/T8622-1997JB/T8623-1997

 

Normal temp insulating resistance

When environment temperature is 15～35℃, relative humidity is no more than 80%, testing voltage is 10～100V(DC), the insulating resistance of electrode and outer tube is ≥100MΩ.

 

Assembly Thermal Resistance WZP-420 WZP-421 Range and accuracy

Thermal resistance type	Range℃	Graduation	Tolerance△t　℃
WZP type Pt resistance	Max Temp.-200～500 Measure Temp:-200～420	Pt100	Class B tolerance±（0.3/+0.005︱t︱）
			Class A tolerance±（0.15/+0.002︱t︱）

Note: “t” is absolute value of measured temperature of temperature-sensing element.

 

Assembly Thermal Resistance WZP-420 WZP-421 Resistance value

Ratio of resistance value of thermal resistance’s sensing element when in 100℃（R100）

and when in 0℃(R0):（R100/ R0）

DegreePt100：

Class A　R0=100±0.06Ω

Class B　R0=100±0.12Ω

 

Assembly Thermal Resistance WZP-420 WZP-421 Thermal response time

When the temperature appear step change, the thermocouple output variation is to the equivalent of 50% of the change, The time required is called the thermal response time “T”

 

The nominal pressure of the thermocouple

Generally speaking, it is the static outside pressure which the protection tube can withstand without being broken in the room temperature. In fact, allowing working pressure is not only related to the protection tube material, the diameter and wall thickness, it is also related to its structure, the installation method, the into depth, the measured flow rate to its structure, the installation method, the into depth, the measured flow rate and the type of media.
 

Assembly Thermal Resistance WZP-420 WZP-421 Model

W	Z	Spec					Content
		P					Pt resistance
		C					Cu resistance
		Thermal resistance material	-	１			Without fixed device
				2			Fixed threaded
				3			Movable flange
				4			Fixed flange
				5			Loose coupling type
				6			Fixed thread conical
				7			Direct coupling type
				8			Fixed threaded pipe joint type
				9			Movable threaded pipe joint type
				Fixed installation form	2		Splash proof
					3		Waterproof type
					4		Explosive-proof type
					Junction box form	0	Φ16mm protection tube
						1	Φ12mm protection tube
						Protection tube diameter	No unified design：All kinds of protection tube
W	Z	P	-	4	2	0 1

 

If the wzp series Assembly Thermal Resistance WZP-420 WZP-421 for sale caters to your requirement, welcome to buy with us. As one of the leading such manufacturers and suppliers in China, we will offer you cheap price and excellent services.