HLQZ Series IoT IC Card Gas Roots Flowmeter integrates the gas roots flowmeter (sensor), IC card flow compensation controller and control valve, and has wireless remote transmission, flow measuring and control functions. It is embedded with the NB-IoT/GPRS communication module to upload the temperature, pressure, transient standard condition, transient working condition, total gas consumption, cumulative gas volume/amount, valve status, battery level and other data of the IC card flowmeter to the cloud server through the data acquisition terminal (BRT-DTU100 wireless data collector) for the wireless data transmission, and achieve the wireless remote monitoring, meter reading, analysis and management of the IC card flowmeter through the server terminal. It is an ideal industrial prepaid metering device.

I. IoT correction controller

• Integrate flow compensation & calculation, IC card operation and valve control. Compact in structure and free of signal transmission error, with high reliability.

• The embedded NB-IoT/GPRS module can form a variety of wireless meter reading systems. Power supply by built-in batteries can achieve a limited number of wireless data transmission, which is easy to use. Besides, the external power supply is also available for online data transmission in real time.

• Adopt micro-power technical design, so that the power consumption of the entire machine is low, and the built-in battery can be used for three years or above.

• Adopt the high-performance microprocessor and modern digital filtering technology, with powerful software and superior performance.

• Adopt the high-precision temperature sensor and pressure sensor to automatically detect the temperature and pressure of the media, to correct the temperature, pressure and compressibility factor and convert the volume flow rate and total volume flow rate under working conditions into that under standard conditions.

• 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.

• With RS485 interface to match with a variety of collectors and form a remote data acquisition system.

• 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 the gas anti-theft function, it can detect and handle flowmeter wire cutting, malicious strong magnetic interference, valve closing and other abnormal conditions in real time.

• Adopt the high-capacity data memory to prevent data loss in case of battery replacement or sudden power outage, and have query function for historical operation data and incident records.

• Realize prepayment and automatic charging.

• Support recharging by sum (yuan)/gas volume (m3). The card or communication can be used for price adjustment in the sum mode. The conventional gas price, stepped gas price or duration gas price are supported.

• The management system issues user cards, acquisition cards, application transfer cards, valve opening cards, valve closing cards, zero clearing cards and price adjusting cards, etc. to facilitate management and use.

II. Basic gas meter

• 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.

• The straight pipe section is not required before and after the flowmeter. The measuring accuracy is not affected by change of pressure and flow rate. It can be installed in a narrow environment.

III. Control valve

• Matched with low pressure valve with optional cut-off structure or high pressure ball valve with close-to-zero pressure loss. The valve diameter is the same as that of the pipe.

• Adopt the valve opening card to control frequent valve opening/closing by the user, ensuring the safety of gas equipment.

• Well-designed circuit with anti-disassembly function. The valve will be closed automatically if disassembly occurs.

• When the battery is exhausted, the valve is automatically closed and the data information is automatically saved to protect the benefits of users.

• The valve can still work normally after it has been opened/closed for 1000 times.

VI. With explosion-proof function, the explosion-proof mark of Exib II BT4 Gb and the protection grade of IP65.