Which Instruments Require Temperature and Pressure Compensation?

Temperature and pressure compensation refers to a technology where instrument measurement data is automatically corrected using calculation formulas based on on-site temperature and pressure measurements, with the reference standard set at 25℃ and one standard atmospheric pressure. Its core purpose is to convert measurement results obtained under non-standard operating conditions into corresponding values under standard conditions, ensuring that results from different measurement points are on the same scale for easy comparison and statistical analysis.

• Application Scenarios: Measuring the flow rate of gases, steam (saturated steam, superheated steam), and liquids
• Compensation Reason: Fluid density changes with temperature and pressure, affecting measurement accuracy
• Features: Built-in temperature probe and external pressure transmitter form an integrated temperature-pressure compensation system
• Applicable Media: Compressed air, steam, etc.

• Types: Orifice flow meter, Double D-bar flow meter, Annubar flow meter, etc.
• Compensation Reason: Measures volume flow under current operating conditions, which needs to be converted to mass flow under standard conditions

• Compensation Reason: Gas density is significantly affected by temperature and pressure; direct volume flow measurements require conversion to standard mass flow

• Function: Specialized measurement and totalization system for flow with temperature and pressure compensation
• Input Signals: Temperature, pressure, flow (current, voltage, pulse)
• Applications: Flow measurement of superheated steam, saturated steam, and general gases

Eliminates the impact of density changes caused by temperature and pressure fluctuations on flow measurement.

Converts all measurement results to standard conditions, facilitating system-wide comparison and statistical analysis.

Intelligent temperature and pressure compensation can achieve a turndown ratio of 1:15, three times higher than that of ordinary instruments.

Equipped with self-diagnostic functions for temperature and pressure faults, enhancing system reliability.

• Occasions with low requirements for temperature and pressure control
• Measurement of compressed air
• Internal metering scenarios

• High maintenance costs
• Data must be read from the flow meter's local display
• Not suitable for applications with suspended pipelines

• Temperature and pressure measurement points should be as close as possible to the flow measurement point
• Ensure synchronization of measurements

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