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Overviews
Wzp-621 assembled thermal resistance with fixed cone protection tube is usually used together with display instrument, recording instrument and electronic computer. It can directly measure the surface temperature of liquid, vapor, gas medium and solid in the range
of - 200 ~ 500 ℃. In addition, it has the advantages of simple assembly, convenient replacement, pressure spring type temperature sensing element, good anti vibration performance, large measurement range, high mechanical strength and good pressure resistance.
Specification
working principle
The thermal resistance measures the temperature by using the characteristic that the resistance of the substance changes with the change of temperature. The heated part of a thermal resistance.(Temperature sensing element)When there is a temperature gradient in the measured medium, the measured temperature is the average temperature in the dielectric layer in the range of the temperature sensor.
The assembled thermal resistance is mainly composed of junction box, protective pipe, terminal, insulation casing and temperature sensing element, and is composed of various installation and fixing devices.
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Thermoelectric resistance category |
Measuring range ℃ |
Dividing number
|
Allowable deviation t ℃ |
|
WZP platinum resistance
|
-200～420 |
Pt100 |
Class B tolerance ±(0.3 or + 0.005 / t /) |
|
Class A tolerance ±(0.002 or + 0.002 / t /) |
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|
WZC copper resistance |
-150～100 |
Cu50 |
-50 ≤ 100 ℃ tolerance ±(0.30 × 6.0 × 10 ~ (- 3) t) |
Technical index
Temperature range and accuracy
|
Thermoelectric resistance category
|
Measuring range ℃
|
Dividing number
|
Allowable deviation t ℃
|
|
WZP platinum resistance
|
-200 / 420
|
Pt100
|
Class B tolerance ±(0.3 or + 0.005 / t /)
|
|
Class A tolerance ±(0.002 or + 0.002 / t /)
|
|||
|
WZC copper resistance
|
-150 / 100
|
Cu50
|
-50 ≤ 100 ℃ tolerance ±(0.30 × 6.0 × 10 ~ (- 3) t)
|
Thermoelectric resistance selection.
Fixed thread conical protection pipe
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Thermoelectric resistance category
|
Product model
|
Dividing number
|
Measuring range ℃
|
Protective pipe material
|
Specifications
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Thermal response time T0.5S
|
|
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Total length L
Mm
|
Depth l
Mm
|
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Single platinum thermal resistance
|
WZP-621
|
Pt100
|
-200 / 420
|
Stainless steel
1cr18Ni9Ti
|
300
350
450
550
|
150
200
300
400
|
≤ 90
|
|
WZP-621A
|
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WZP-631
|
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Double platinum thermal resistance
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WZP2-621
|
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WZP2-621A
|
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WZP2-631
|
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Note: nominal pressure:30MPa
Comparison table of model specification of fixed thread conical protection pipe
