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Product
Explosion-proof Electric Contact Pressure Gauge
- Product details
-
Instrument Principle:
Composed of flameproof enclosure, measuring system, electric contact group, adjusting device, and outlet box. The flameproof enclosure suppresses explosion pressure and prevents flame propagation. The Bourdon tube drives contacts to switch circuits for control and indication.
Features & Application:
Suitable for hazardous explosive areas to measure non-crystallizing, non-solidifying explosive mixtures or non-explosive media. Used with explosion-proof electrical devices for automatic control and alarm.
Main Technical Indicators:
Accuracy class: 1.6
Dial diameter: Φ160
Range: 0~0.16…60 MPa; -0.1~0.15…2.4 MPa
Control: Upper/lower slow-contact switch
Max voltage: DC220V or AC380V
Mounting: Vertical
Please contact us for detailed specifications, models and catalog selection. We will provide customized selection services！
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Q
What is a thermocouple?
A
Thermocouples are the preferred solution for extreme temperature applications. They consist of two dissimilar metal wires joined at the measuring end, generating a voltage proportional to the temperature difference.
Working Principle: When two different metals are connected, the thermoelectric effect produces a voltage at the junction. This voltage increases with rising temperature, allowing measurement via reference tables.
Key Advantages:
• Temperature Range: -270°C to 2300°C (depending on type)
• Fast Response Time (typically 0.1–10 seconds)
• Robust Construction, vibration-resistant
• Relatively Low Cost
• No External Power Required
Q
What is the difference between RTD and thermocouple?
A
• RTD (Resistance Temperature Detector): Based on the principle that a metal conductor's resistance increases with temperature, it converts resistance measurements into temperature readings.
• Thermocouple: Operates on the Seebeck effect, where two dissimilar metals in contact generate a thermoelectric voltage proportional to temperature differences.
Features
• RTD: High accuracy, stable signal, excellent linearity, ideal for low to medium temperatures.
• Thermocouple: Simple structure, fast response, high-temperature resistance, wide measurement range.
Pros & Cons
• RTD Pros: High precision, strong anti-interference, reliable low-temperature performance.
Cons: Limited upper temperature range, bulkier size, slightly slower response.
• Thermocouple Pros: Broad temperature range, high-temperature tolerance, rapid response, suitable for moving/surface measurements.
Cons: Lower accuracy at low temperatures, requires cold junction compensation, weaker signal prone to interference.
