Water level gauge series
Pluviometer series
Gate level gauge series
Evaporation station series
Display instrument series
Flow velocity series
Flood warning series
Groundwater monitoring equipment
Gate control system
Pumping station control system
Geological disaster prevention
Dam monitoring system
Water regime measuring and reporting system
Telemetry terminal products
Soil moisture monitoring system
Agricultural well irrigation control system
Groundwater level automatic monitoring system
Groundwater level automatic monitoring system
1. overview
3D-MEMS silicon capacitive pressure sensor is famous for its high precision, small size ↓and ultra low power consumption. The power consumption ♥of this kind of sensor is very low, which makes it↕ have incomparable advantages in the battery powered equipment.
The 3D-MEMS silicon capacitive pressure sensor, through t♥he differential operation and nonlinear correction and temperature comp≈ensation of the microprocessor, eliminates the effect of changes in atmospheric pΩressure, water pressure in order to achieve high precisi↕on measurement, temperature measurement and storage.
All stainless steel integral structure design, waterproof design 100% of the long-term use of wat"er, water pressure sensor, pressure sensor, battery and circuit are sealed in a stainless steel casing. 22mm is the international standard size, §can be installed in deep application and other application field, groundwater, rivers, lakes, reservoirs and other long-term monitoring and forecasting of geologi★cal disaster comprehensive utilization.
2. characteristics
A. silicon capacitive absolute pressure sensor based on 3D-MEMS tech>nology, long-term use without zero drift;
B. sensor has very low power consumption and consumes 25uA of total current at normal o✔peration;
C. integrates water level and temperature measuremenφt into one, which is suitable for water level monitoring and co mprehensive utilization of geological disasters;
Intelligent switching of D. internal and external power supply;
C. uses 16 bit microprocessor mixed signal technology, linear¥ and temperature error compensation for digital water level ♣sensor, high precision and high resolution d.64Mbi; large capacity flash memory, long-term reco rd data automatically;
E. water level range: 10 meters, 20 meters, 40 mete♠rs, 70 meters, 100 meters;
F. overload capacity: greater than 10 times full scale;
The working temperature range of G. is -40~125 centi'grade, resolution is 0.01, and the precision is 0.2.
3. working principle and process
Using a new type of silicon capacitive absolute pressure sensor to measure the de♥pth of water, pressure sensor and atmospheric pressure sensor pressure signal has a high ac₹curacy and resolution. Two pressure sensors and linear> temperature error of digital compensation, compensation parameters storeδd in the nonvolatile memory, to ensure the safety of data.
According to the user set the acquisition cycle, activation system from sleep modeδ, MCU began to work, the temperature and pressure signal through the signal conditioning part was sent to MCU for processing, and then stored φin the prescribed format to Flash. You can read the download to use these data reading device βthrough the RS485 interface, the data include: hydrostatic pressure, hydrostatic pressure value, v©alue, temperature, battery voltage, current time, hi♠storical data etc..
When the end of the water level, temperature data acquisition and recording system, o₹nce again into the sleep mode, MCU and peripheral module to stop wo&rking, only the clock module, battery power supply to maintain the accuracy of th≤e clock module, clock. The clock module is responsible f↕or activating the system and continuing to collect and record when the set sampling int↕erval arrives. Each time the reader reads the data from the interface, the' system clock is corrected once, to ensure the accuracy of time.
Part of the power management of power management, in order to prolong the battery life, and i×n the use of the reading device, is responsible for the external power switch in, disconnec&t the battery and then cut back. The protection circuit is responsible for εproviding overvoltage protection to the whole system.
4. performance parameters
Pressure sensor silicon capacitive pressure sensor
Baoding range 10, 20, 40, 70, 100 mH2O
Overload 10*FS
Accuracy 0.05%FS
Resolution 0.005%FS
Response time was less than 10 s
The working temperature range is -20~85 centigrade
Compensation temperature range 0~50
Digital temperature sensor based on temperature senso♥r
The range of temperature is -40~125 centigrade
Temperature accuracy is 0.2
Temperature resolution is 0.01
Clock accuracy is 1 minutes / year
Power supply 3.6V AA lithium battery or external 8~4'0V power supply V
Battery life 10 years (1 measurements / hours)
Output signal RS485 digital interface /MODBUS
Storage type Flash
The storage capacity is 50000
Acquisition frequency 1 ~99 hours set
Acquisition mode timing acquisition or command type acquisition
Atmospheric pressure compensated internal pressure sensor↕
Note: This product can be equipped with single wire or double wire gas cable, please specify the o×rder when the user orders.
3D-MEMS silicon capacitive pressure sensor is famous for its high precision, small size ↓and ultra low power consumption. The power consumption ♥of this kind of sensor is very low, which makes it↕ have incomparable advantages in the battery powered equipment.
The 3D-MEMS silicon capacitive pressure sensor, through t♥he differential operation and nonlinear correction and temperature comp≈ensation of the microprocessor, eliminates the effect of changes in atmospheric pΩressure, water pressure in order to achieve high precisi↕on measurement, temperature measurement and storage.
All stainless steel integral structure design, waterproof design 100% of the long-term use of wat"er, water pressure sensor, pressure sensor, battery and circuit are sealed in a stainless steel casing. 22mm is the international standard size, §can be installed in deep application and other application field, groundwater, rivers, lakes, reservoirs and other long-term monitoring and forecasting of geologi★cal disaster comprehensive utilization.
2. characteristics
A. silicon capacitive absolute pressure sensor based on 3D-MEMS tech>nology, long-term use without zero drift;
B. sensor has very low power consumption and consumes 25uA of total current at normal o✔peration;
C. integrates water level and temperature measuremenφt into one, which is suitable for water level monitoring and co mprehensive utilization of geological disasters;
Intelligent switching of D. internal and external power supply;
C. uses 16 bit microprocessor mixed signal technology, linear¥ and temperature error compensation for digital water level ♣sensor, high precision and high resolution d.64Mbi; large capacity flash memory, long-term reco rd data automatically;
E. water level range: 10 meters, 20 meters, 40 mete♠rs, 70 meters, 100 meters;
F. overload capacity: greater than 10 times full scale;
The working temperature range of G. is -40~125 centi'grade, resolution is 0.01, and the precision is 0.2.
3. working principle and process
Using a new type of silicon capacitive absolute pressure sensor to measure the de♥pth of water, pressure sensor and atmospheric pressure sensor pressure signal has a high ac₹curacy and resolution. Two pressure sensors and linear> temperature error of digital compensation, compensation parameters storeδd in the nonvolatile memory, to ensure the safety of data.
According to the user set the acquisition cycle, activation system from sleep modeδ, MCU began to work, the temperature and pressure signal through the signal conditioning part was sent to MCU for processing, and then stored φin the prescribed format to Flash. You can read the download to use these data reading device βthrough the RS485 interface, the data include: hydrostatic pressure, hydrostatic pressure value, v©alue, temperature, battery voltage, current time, hi♠storical data etc..
When the end of the water level, temperature data acquisition and recording system, o₹nce again into the sleep mode, MCU and peripheral module to stop wo&rking, only the clock module, battery power supply to maintain the accuracy of th≤e clock module, clock. The clock module is responsible f↕or activating the system and continuing to collect and record when the set sampling int↕erval arrives. Each time the reader reads the data from the interface, the' system clock is corrected once, to ensure the accuracy of time.
Part of the power management of power management, in order to prolong the battery life, and i×n the use of the reading device, is responsible for the external power switch in, disconnec&t the battery and then cut back. The protection circuit is responsible for εproviding overvoltage protection to the whole system.
4. performance parameters
Pressure sensor silicon capacitive pressure sensor
Baoding range 10, 20, 40, 70, 100 mH2O
Overload 10*FS
Accuracy 0.05%FS
Resolution 0.005%FS
Response time was less than 10 s
The working temperature range is -20~85 centigrade
Compensation temperature range 0~50
Digital temperature sensor based on temperature senso♥r
The range of temperature is -40~125 centigrade
Temperature accuracy is 0.2
Temperature resolution is 0.01
Clock accuracy is 1 minutes / year
Power supply 3.6V AA lithium battery or external 8~4'0V power supply V
Battery life 10 years (1 measurements / hours)
Output signal RS485 digital interface /MODBUS
Storage type Flash
The storage capacity is 50000
Acquisition frequency 1 ~99 hours set
Acquisition mode timing acquisition or command type acquisition
Atmospheric pressure compensated internal pressure sensor↕
Note: This product can be equipped with single wire or double wire gas cable, please specify the o×rder when the user orders.
