The Series KF100 Thermal Gas Mass Flowmeter - Ningbo KIO Flow Instruments Co.,Ltd.

From DN15 to DN3000, used for various industrial applications

The Series KF100 Thermal Gas Mass Flowmeter operates on the principle of thermal diffusion, determining the mass flow rate by measuring the heat transfer relationship between the fluid and a heat source. Its core components include two temperature sensors and a heating element: the reference sensor measures the fluid temperature, while the measurement sensor is heated to a constant temperature difference above the fluid temperature. When gas flows, the heat carried away is proportional to the mass flow rate; changes in heating power or temperature difference are converted into electrical signals, which are then used to calculate the mass flow rate. Thermal flow meters can directly measure mass flow without requiring temperature and pressure compensation, offering fast response and a wide measurement range. They are suitable for low-velocity and small-flow gas measurements and are widely used in various application fields such as industrial process control, environmental monitoring, and medical equipment.

Directly measures gas mass flow without requiring temperature and pressure compensation
Wide measurement range with a turndown ratio of up to 100:1
Stable operation at low flow velocities (e.g., 0.05 m/s)
Fast response time for real-time tracking of flow changes
High accuracy of ±1.5%
Simple structure, minimal pressure loss, easy installation and maintenance
Excellent repeatability and stability with strong anti-interference capability
Capable of measuring various gases, including certain corrosive gases

Semiconductor industry
Chemical industry
Pharmaceutical industry
Food and beverage industry

Electronics industry
Environmental protection industry
Energy industry
Scientific research field

SPECIFICATIONS
Service	Gases compatible with the selected material
Wetted Material	304 or 316 Stainless Steel
Housing Material	Die-cast aluminum
Accuracy	士1. 5%RS
Repeatability	土0.2%
Flow Velocity Range	0.05 m/s - 100 m/s
Pressure Rating	Flange: optional 1.6, 2.5, or 4MPa, Insertion: 1.6MPa
Temperature Rating	-10℃ - 200 °C
Power Supply	220VAC or 24VDC
Output	4-20mA + pulse + RS485
Display	16 digits X 4 lines
Switch output	2 Relays, 3A/250VAC, 3A/30VDC
Enclosure Rating	IP65
Electrical Connections	M20*1 5