Comparison of advantages, disadvantages and applicable conditions of thermal gas mass flow meters
Thermal gas mass flow meters feature fast response and high precision for clean small and medium gas flow, needing no temperature and pressure compensation. But they are vulnerable to contamination and limited in large flow measurement, suitable for precise industrial gas control rather than dirty gas or large-bore pipeline scenarios.
Dedicated Thermal Gas Mass Flow Meter Solution for the Marine Industry
Customized for harsh marine environments with vibration, salt fog and wide temperature variation, this upgraded thermal mass flow meter adopts anti-corrosion and shockproof design. It realizes stable gas mass flow monitoring for ship engines, exhaust treatment and compressed air systems, complying with marine industry operation standards.
Thermostatic mass flow meter with constant temperature difference
Brief Summary
Adopting fixed temperature difference control, this flow meter features fast response and high measuring accuracy without temperature and pressure compensation. It dominates mainstream MFC applications, yet it is vulnerable to pipeline contamination and is not fit for ultra-large gas flow conditions.
What is a thermal gas mass flow meter? — Principles, characteristics, and applications
A thermal gas mass flow meter (also the core sensing unit of MFC, Mass Flow Controller) is an instrument that directly measures the mass flow rate of gas by detecting heat transfer between a heating element and flowing gas. It outputs mass flow signals without complex temperature and pressure compensation, dominating small-to-medium gas flow measurement in precision industries.
The three main principles involved in mainstream gas mass flow meters and mass flow controllers
Thermal MFC: Standard for low & medium flow semiconductor, coating and laboratory processes
Coriolis meter: High-precision large-flow measurement of rare or corrosive specialty gases
Laminar differential pressure meter: Heavy industrial large-flow, high-temperature crude process gas measurement
Application of capacitive level gauges in small nitrogen fertilizer plants
Small nitrogen fertilizer plants mainly produce urea, ammonium bicarbonate and other common agricultural fertilizers, involving gasification, carbonization, ammonia recovery, wastewater treatment and other complex production processes. The production environment features corrosive ammonia liquid, circulating desulfurization solution, high humidity, flammable and explosive ammonia gas, as well as medium adhesion and foam interference. Traditional level measuring instruments such as float level gauges and ultrasonic level gauges are prone to failure, stuck movement and inaccurate readings under such harsh working conditions
How to select a probe for a capacitive level gauge
Probe selection for capacitive level gauges should consider medium type, anti-corrosion materials, measuring range, temperature and pressure resistance, special medium interference and actual installation methods to match proper probe styles and guarantee stable measurement.
Application scenarios of capacitive level gauges
Capacitive level gauges detect liquid, paste, powder and granular materials by capacitance variation, featuring corrosion resistance, wide temperature and pressure adaptability, explosion-proof options and compact structure. Their main application scenarios are classified by industry as follows.
Capacitive level gauges can measure highly corrosive media in operating conditions.
Capacitive level gauges are indeed capable of measuring highly corrosive media, relying on protective coating materials for anti-corrosion performance.
