Fixed Thread Conical Protective Tube Assembly Thermal Resistance WZP-621,WZP-621A,WZP-631
WZP series assembly-type therm al resistance Brief Description WZP series assembly-type thermal resistance is used as a sensor to measure temperature, usually matched with display instruments, recording meter and electronic computer. It can directly measure temperature from -200 o C to 500 o C...
WZP series assembly-type thermal resistance
WZP series assembly-type thermal resistance is used as a sensor to measure temperature, usually matched with display instruments, recording meter and electronic computer. It can directly measure temperature from -200oC to 500oC 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, the device 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.
Thermal resistance measures temperature using the property that its resistance value changes with temperature. Temperature sensing element of thermal resistance 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.
Main technical parameter
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.
Range and accuracy
Thermal resistance type
WZP type Pt resistance
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.
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
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.
Thermal resistance min inserting depth
︱min－min usable inserting depth
︱元－length of temperature sensing element
D－protection tube outer diameter
Thermal resistance material
Without fixed device
Loose coupling type
Fixed thread conical
Direct coupling type
Fixed threaded pipe joint type
Movable threaded pipe joint type
Fixed installation form
No unified design：Socket type，Small junction box type etc
Junction box form
Φ16mm protection tube
Φ12mm protection tube
Protection tube diameter
No unified design：All kinds of protection tube
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