- Phone
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Address
185 Haichuan Road, Shanghai
Shanghai Ziyi Automation Instrument Co., Ltd
185 Haichuan Road, Shanghai

industrialExplosion proof thermistorAs a sensor and display instrument for temperature measurement and control, it is used to directly measure and control the temperature of gases, liquids, and vapors in the production process.
Our company's chemical specific explosion-proof thermocouples and explosion-proof resistance products are designed and manufactured according to the national standard of "Explosion proof Electrical Equipment for Explosive Environments" for explosion-proof performance. Their thermoelectric characteristics comply with international IEC standards and have been tested and qualified by the National Instrument Explosion proof Safety Supervision StationThe structure, principle, and assembly method of explosion-proof thermocouples and explosion-proof thermistors are basically the same. The main difference is that the explosion-proof product junction box (housing) is designed with high-strength aluminum alloy die-casting, and has sufficient internal space, wall thickness, and mechanical strength. The thermal stability of the rubber sealing ring meets national explosion-proof standards. So when the explosive gas mixture inside the junction box explodes, its internal pressure will not damage the junction box, and the resulting heat energy cannot diffuse outward - the explosion cannot be transmitted As long as users strictly follow the product usage rules, explosion-proof thermistor products can achieve reliable explosion-proof effects.
| characteristic |
| Pressure spring type temperature sensing element with good anti vibration performance; |
| High measurement accuracy; |
| No need to compensate for wires, saving costs; |
| Imported thin film resistor components with reliable and stable performance. |
| Working principle |
| Explosion proof thermistorIt is based on the principle of gap explosion prevention to design junction boxes and other components with sufficient strength. All components that can generate sparks, arcs, and dangerous temperatures are sealed inside the junction box cavity. When an explosion occurs inside the cavity, it can be extinguished and cooled through the gap between the joint surfaces, so that the flame and temperature after the explosion cannot be transmitted outside the cavity, thus achieving explosion prevention. |
| Main technical parameters |
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Product execution standards IEC751 JB/T18622-1997 JB/T8623-1997 JB/T5518-91 |
| Room temperature insulation resistance |
| Explosion proof thermistorAt an ambient temperature of15—35°CThe relative humidity is not greater than80%The test voltage is10—100VInsulation resistance between (DC) electrode and outer sheath>100MΩ. |
| Measurement range and tolerance |
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model
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Graduation
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Measuring range
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accuracy class
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Allowable error
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WZP
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Pt100
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-200-+500
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Alevel
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±(0.15+0.002) ltl
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Blevel
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±(0.30+0.005) ltl
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WZC
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Cu50 Cu100
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-50-+100
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±(0.30+0.005) ltl
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| Model naming convention |
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