HLQZ series intelligent Roots gas flowmeter is an intelligent flowmeter that integrates flow, temperature and pressure detection functions and automatically corrects temperature, pressure and compression factors. It is featured with low starting flow, wide range ratio, high precision, small size, easy installation and maintenance, and long service life. It is widely used in the flow metering of non-corrosive gases such as natural gas, coal gas, and industrial inert gas. In addition, it is also an ideal instrument for gas metering in urban gas, petroleum, chemical, electric power, metallurgy, and scientific research sectors etc. Roots gas meters with different levels of accuracy and performance are available, depending on the specific user's needs.

• With wide measuring range, low starting flow rate, high measuring accuracy, low pressure loss, and good repeatability.

• The spindle and bearing of surface structure are solid and durable with good mechanical rigidity.

• The shell and rotor surface are treated through special process with high hardness and good corrosion resistance.

• Strict dynamic balance test to ensure working stability and service life of the product.

• Adopting bearings for exclusive use of instruments imported from Europe, with flexible rotation and high durability.

• Adopting single-end synchronous transmission to minimize the meter length and saves installation space.

• Adopting high-performance CPU and modern digital filtering technology, with powerful software and superior performance.

• The circuit system adopts micro power consumption design, with built-in battery for power supply; in addition, an external power supply can also be adopted.

• Integrating the flowmeter sensor and the volume corrector, it can detect the temperature, pressure and compression factor of the measured gas for automatic tracking and correction, directly detecting or measuring the standard condition volume flow and total amount of the gas.

• The LCD screen displays the standard cumulative flow rate, standard volume flow rate, volume flow rate under working conditions, medium temperature, absolute pressure and battery capacity percentage, etc., with prompt in both Chinese and English.

• There are three kinds of historical data records: start and stop records, status records, and daily records, which are convenient for users to query and count the gas consumption.

• It has real-time data storage function to prevent data loss when battery is replaced or suddenly power-off; internal parameters and historical data records can be permanently saved in power-off state.

• It can be embedded with NB-IoT/GPRS wireless communication module, built-in battery or external power supply for data transmission and easy use.

• Provided with RS-485 communication interface for matching with a dedicated data acquisition box, forming a remote data acquisition and monitoring system via NB-IoT/GPRS, which realizes centralized data acquisition and real-time management.

• Configured with two-wire 4-20mA standard current signal output for easy connection with secondary instruments.

• With built-in lightning protection, anti-surge, pulse group suppression and other protection circuits, the external transmission interface is electrically isolated with strong anti-interference performance and high reliability.

• With data tamper prevention and automatic key data modification recording functions.

• Explosion-proof function, explosion-proof mark: Exib II BT4 Gb.