Differences Between Mechanical and Electronic Temperature Compensation in Gas Meters

Mechanical Temperature Compensation

Principle: Utilizes the thermal expansion and contraction effect of a thermistor bimetallic element. A mechanical structure adjusts the diaphragm's travel, changing the rotational volume to achieve standard temperature volume measurement.

Features: No external power supply required; extremely low power consumption.

• High requirements for manufacturing processes and thermistor elements; product consistency may be lower.

• Suitable for environments with small temperature fluctuations (e.g., indoors).

Electronic Temperature Compensation

Principle: Uses a microcontroller to collect ambient temperature in real time, combining it with the gas equation to calculate the conversion relationship between the operating volume and the standard volume, dynamically correcting the measurement value.

Features:

• Higher accuracy (error ≤ ±0.2%); adaptable to a wider temperature range (-20℃~85℃).

• Requires battery power; power consumption needs optimization (e.g., NST1001/NST1002 models have near-zero power consumption). • Flexible communication interfaces (such as digital pulse or single-bus protocols), suitable for complex environments.

• Suitable for outdoor or environments with drastic temperature fluctuations.

Comparison of Applicable Scenarios

• Mechanical temperature compensation: Suitable for indoor constant temperature environments, low cost but limited accuracy.

• Electronic temperature compensation: Suitable for outdoor or environments with large temperature differences, high accuracy but higher cost.