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Product
Ammonia Pressure Gauge
- Product details
-
Application Scope:
Mainly used in fertilizer production or refrigeration equipment to measure pressure of liquid ammonia, ammonia gas, or mixtures. Also for non-corrosive, non-crystallizing, non-solidifying media to carbon steel and stainless steel.
Main Technical Parameters:
Case diameter: 100, 150 mm
Accuracy: 2.5%, 1.6%
Connection thread: M20×1.5
Ambient condition: -40~70°C, relative humidity ≤90%
Temperature effect: ≤0.4%/10°C when deviating from 20±5°C
Range: 0~0.16…60 KPa; -0.1~0.06…2.4 MPa
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.
