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Product
Differential Remote Transmission Pressure Gauge
- Product details
-
Application:
Two-wire intrinsically safe explosion-proof instrument for pressure measurement of media non-corrosive to copper alloy. With damper: measures pulsating, impact, sudden unloading pressure. With diaphragm: measures high-viscosity, corrosive media. Provides local indication and 4~20mA DC linear output. Compatible with DDZ-III instruments for recording and control. Used in petrochemical, metallurgical, power, light industry.
Main Technical Indicators:
Measuring range: See model list
Output signal: 4~20mA DC, two-wire
Accuracy class: 1.6
Dial diameter: Φ150
Load resistance: 250~350 Ω
Ex marking: ibIICT5
Power supply: 24V DC
Ambient: -10~55°C, humidity ≤85%, external magnetic field ≤5 Oe
Contact us for detailed specifications, catalogs, and customized selection.
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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.
