1、 System overview

A, GPRS NB IOT wireless fire water pressure monitoring system pt500-990 is a high-performance intelligent low-power system based on GPRS weighing network and Nb IOT narrow-band Internet of things transmission, supporting IOT cloud platform to achieve remote data collection, monitoring, analysis, patrol, alarm, classification, geographical location, data report curve download, mobile device app software to monitor and alarm anytime and anywhere. Communication standard Modbus ttl-rtu, MODBUS Rs485-rtu digital signal, with 5-bit led on-site display, the display mode can be continuous display and trigger display. This product takes microprocessor as the core, which can reliably realize the collection and processing of pressure, liquid level, temperature, weight and other signals, the fastest collection frequency is 10s, the fastest inspection frequency is 3S, and can set the lower and upper limit pressure, liquid level, temperature, weight and other abnormal alarms.

B. System composition:

Fire box / Hydrant / fire water supply network: system monitoring object

GPRS, Nb IOT wireless pressure sensor: pressure acquisition

GPRS, Nb IOT wireless pressure sensor display meter (optional): field pressure display (continuous display requires external power supply, no display or trigger display can be battery powered)

GPRS, Nb IOT wireless module (integrated with sensor): data transmission

Flow card, Internet of things card: flow payment

Power module: 3.6vdc19000mah battery pack or 12-24vdc external power cord or 220vac-12vdc transformer power supply

ECS: data receiving and storage (maximum capacity of data throughput 100000 devices)

Internet of things equipment collection cloud platform www.puliangiot.com: user settings, data classification, analysis, judgment, curve formation, data download, collection frequency settings, alarm point pressure settings, patrol alarm frequency settings, collection point geographic location display, alarm mode selection (wechat, SMS, phone, email), etc

Mobile device app acquisition software: data synchronization with cloud platform

Audible and visual alarm module (optional): abnormal pressure alarm at acquisition point (too low pressure or too high opening water pressure and pressure), requiring external power supply

C. System structure flow chart:



2、 System features and functions

1). Low power GPRS weighing network or ultra-low power NB IOT narrowband Internet of things can be selected as networking mode.

2). Supporting free IOT Cloud Collection and monitoring platform.

3). Supporting free mobile device app acquisition and monitoring software.

4). Field low-power five digit display meter can be divided into continuous display and trigger display (optional).

5). Users are free to set collection frequency and patrol frequency.

6). The upper and lower limit abnormal alarm can be set, with various alarm forms.

7). The data communication protocol can be Modbus ttl-rtu or Modbus rs485-rtu.

8). 3.6-5vdc battery power supply, external 12-24vdc power supply, 220VAC + voltage regulator power supply.

9). High precision 24 bit ADC collects and digitizes the sensor signal.

10). Enhanced EMC anti-interference design, hardware watchdog, suitable for all kinds of electromagnetic environment harsh industrial environment.

11). Pure digital pressure, liquid level, temperature, weighing sensor signal processing algorithm, higher accuracy.

12). Special custom-made assic circuit, higher integration and better reliability.

13). Full digital calibration, no movable potentiometer, lower temperature drift to < 20ppm.

14). 24hx365 Days online monitoring, data server records data for several years.

15). Open cloud platform, seamless connection with user configuration system, customized software and special platform.

3、 Product operation environment:

1). The installation position of GPRS mobile network product must have 2G mobile signal.

2). NB IOT narrowband IOT products must have NB IOT base station signal at the installation location.

3). If the product needs to install IOT network card, it will generate a certain amount of traffic cost (the traffic size is directly proportional to the acquisition frequency).

4). When the on-site display mode is continuous, it is required to collect external power supply or solar energy to charge the battery.

5). During outdoor installation and application, lightning protection measures shall be added.

6). Address of the universal IOT device data cloud platform: http://www.puliangiot.com



4、 Product application:

Remote monitoring and control of pressure, temperature and liquid level of water supply pipes in cities, communities, industrial parks and villages.

Remote monitoring and control of pressure, temperature and liquid level of urban gas pipeline.

Remote monitoring and control of pressure, temperature and liquid level of fire pipeline in cities, communities, industrial parks and villages.

Remote monitoring and control of pressure, temperature and liquid level of urban heating pipeline.

Remote monitoring and control of pressure, temperature and liquid level of pipeline leakage detection system.

Remote monitoring and control of tank, tank pressure, temperature, liquid level, etc.

Remote monitoring and control of oil well / oil field pipeline pressure, temperature, liquid level, etc.

Remote monitoring and control of construction pipeline pressure, temperature, liquid level, etc.

Remote monitoring and control of pressure, temperature and liquid level in the process of chemical industry, electric power and food production.

Remote monitoring and control of pressure, temperature and liquid level of environmental pollution pool.

5、 Main technical parameters:

Tested medium: gas, liquid and vapor

Pressure type: gauge pressure, absolute pressure, differential pressure

Range:

Gauge positive pressure: 5kpa; 10KPA; 20KPa; 50kPa; 100KPA; 200KPa; 500kPa; 0.6MPa ~ 60MPa (any range)

Gauge negative pressure: - 100KPA ～ 0; - 50kPa ～ 0; - 20KPa ～ 0; - 10KPA ～ 0;

Gauge pressure positive and negative pressure: - 100KPA ～ 100KPA; - 100KPA ～ 600kpa; - 100KPA ～ 1000kPa; - 0.1MPa ～ 1.6Mpa;

-0.1MPa～2.5MPa；±10KPa；±50KPa；±100KPa；

Absolute pressure: 0.1MPa; 0.6MPa; 1MPa; 1.6Mpa; 2MPa; 3Mpa

Output: Standard MODB