Gas roots flow meter
Gas roots flowmeter is a kind of gas monitoring and measuring instrument with high precision, high reliability and wide range.Intelligent gas roots flowmeter is a new type of flowmeter which integrates flow
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Product introduction
Gas roots flowmeter is a kind of gas monitoring and measuring instrument with high precision, high reliability and wide range.
Intelligent gas roots flowmeter is a new type of flowmeter which integrates flow, temperature, pressure sensors and intelligent instrument on the basis of roots flowmeter.
Intelligent gas roots flowmeter is an ideal instrument for measuring non-corrosive gases such as natural gas, city gas, propane, nitrogen, industrial inert gas, etc.
Technical Specification Table
| LLQ gas Roots flow meter |  |
| Material | Aluminum alloy |
| Accuracy | 1.5% |
| Measuring range | 1-450 m3/h |
| Diameter (MM) | DN25-DN100 |
| Output | 4-20mA / Pulse / RS485 |
| Press | 1.6Mpa |
| Power | 24VDC or 3.6V Lithium battery |
| Connection | Flange （DN25-DN100） |
| Conditions of use | A. ambient temperature:-25 ~+80 ℃ B. medium temperature:-20 ~+60 ℃ C. relative humidity: 5-95% D. atmospheric pressure: 86 kpa-106 kpa |
| Protection level | IP65 |
Technology Parameter
| Specifications | Diameter DN （mm） | Flow range (m3/h) | Initial flow (m3/h) | Max working pressure (MPa) | Nominal press (MPa) | Material | ||||
| LLQ-16 | 25 | 1-16 | 0.04 | <0.6 | 1.6 | Aluminum alloy | ||||
| LLQ-25 | 40 | 1-25 | 0.07 | <1.2 | ||||||
| LLQ-40 | 40 | 1-40 | 0.07 | |||||||
| LLQ-60 | 50 | 2-60 | 0.1 | |||||||
| LLQ-85 | 50 | 2-85 | 0.1 | |||||||
| LLQ-100 | 80 | 3-100 | 0.1 | |||||||
| LLQ-150 | 80 | 3-150 | 0.12 | |||||||
| LLQ-200 | 80 | 4-200 | 0.15 | |||||||
| LLQ-300 | 100 | 5-300 | 0.11 | |||||||
| LLQ-450 | 100 | 5-450 | 0.1 | |||||||
Selection codes of flow meter
| Selection codes of Flow meter | ||||||
| LLQ | Description | |||||
| Meter Style | A | 24VDC power, Temp. And press compensation | ||||
| B | Dual power (24VDC and 3.6V lithium battery） Temp. and press compensation | |||||
| Meter diameter | -XXX | DN25.40.50.80.100. | ||||
| Material | L | Aluminum alloy | ||||
| Single output | 0 | Pulse output | ||||
| 1 | 4-20mA | |||||
| 2 | RS485 | |||||
| 3 | Pulse, 4-20mA, RS485 | |||||
| Nominal Pressure | -016 | 1.6MPa | ||||
Note: 24VDC power and Dual power are same price.
Feature
-
Wide range:
According to different specifications, the highest range can reach 1: 216 -
Low initial flow:
According to different specifications, the minimum starting flow can reach 0.04m3/h. -
High precision and repeatability:
The long-term accuracy is not affected by the medium, and the long-term operation is stable. -
Low pressure loss:
According to different specifications, the pressure loss is 0.08kPa-0.58kPa. -
High integration and low power consumption
Adopting advanced microcomputer technology and high-performance integrated chip.The whole machine has powerful functions and superior performance. -
Compact structure:
Pressure sensor, temperature sensor and flow sensor are all built in, making the structure more compact. -
Digital pressure temperature sensor
Digital temperature sensor and digital pressure sensor are configured, calibrated and verified separately, and are convenient to replace, maintain and use. -
Segment correction
According to the flow frequency signal, the instrument coefficient can be automatically linearly corrected in six segments to improve the wide range accuracy of the instrument. -
Complete data storage function,
E2PROM data storage chip is used to store user parameters, manufacturer parameters and timely data storage function to prevent data loss in case of sudden power failure. In case of power failure, internal parameters can be stored permanently. -
The basic output is complete.
The intelligent flowmeter has a base meter pulse output, a working condition or standard temperature and pressure pulse signal output, and a calibration pulse output. RS485 interface can also output 4 ~ 20mA standard analog signals according to user's requirements. -
Data traceability management
Real-time database can be queried and analyzed through RS-485 communication interface. -
GPRS real-time management system
In this series, Type B meter has GPRS transmission function. It can realize transmission function online, with long timing and fixed point. It is extremely easy to set up GPRS wireless network system.
