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| Description |
Series 8421 resistance thermometer can be combined with a variety of thermowells. Use without thermowell is recommended only for specific applications.
This series of resistance thermometers can replace measuring elements.The process connection, connection method and sensor insertion length can be used with thermowells, which are suitable for the size and application of various thermowell.
The resistance thermometer can be equipped with its own temperature transmitter. |
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| Technical Specification |
| Type |
8421 |
| Name |
Resistance Thermometer |
| Measuring range |
-50 ... +200°C |
| Measuring element |
Pt100 |
| Measuring element tolerance value per IEC 60751 |
Class B、Class A |
| Accuracy @ 100°C |
~ 1 Kelvin |
| Response time |
t50 < 25 S、t90 < 75 S（for sensor diameter 11 mm） |
| Sensor diameter |
9mm、11mm |
| Sensor insertion length |
50mm、100mm、150mm、200mm（Max. 500mm） |
| Fitting thread |
G1/2"、1/2"NPT |
| Tightening torque, recommended |
20 Nm |
| Measuring insert |
Replaceable |
| Material of process connection |
Stainless Steel 316 |
| Material of sensor tube |
Stainless Steel 316 |
| Output signal |
Pt100 |
| Connection method |
2-wire、3-wire、4-wire |
| Measuring current |
0.1 ... 1.0 mA |
| Storage temperature |
-40 ... +125°C |
| Ambient temperature |
-40 ... +125°C |
| Electrical connection |
Type B to DIN 43729 |
| Protection degree |
IP65 |
| Applications |
Machinery Industry |
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Equipment and Tank Manufacturing |
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Energy and Power Plant Technology |
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Chemical Industry |
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Food and Beverage Industry |
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Health Industry |
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Heating and Air Conditioning Technology |
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Features |
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• Measuring ranges from -50°C to 200°C |
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• Output signal: Pt100 in 2-, 3-, 4-wire circuit |
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• Compact dimensions |
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• Short delivery times |
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• Process connection and sensor tube from 316 |
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• Process connection G1/2 ", 1/2NPT and others |
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