System composition: groundwater sampler, portable water quality analyzer, tablet APP software.

1、 System Overview:

Groundwater sampler：

Including: groundwater sampling controller, water level drop meter, pressure pipe, outlet pipe, water surface detector, well depth gauge, bracket reel, scale steel wire rope, airbag pump, stainless steel submersible pump, portable power bank, tool kit. The groundwater sampler can directly control the start and stop of the airbag pump and submersible pump, adjust the water flow rate through a tablet APP. It is connected to the groundwater sampler controller through wireless WIFI through the APP, and the groundwater sampler controller is connected to a water level drop meter to observe the water level drop in real time. The water level drop gauge and pump are intelligently linked. When the water level reaches the set drop depth (10cm), the pump automatically stops working. When the water level returns to the starting level, the pump automatically starts the sampling process again.

Portable water quality analyzer:

Real time online measurement of dissolved oxygen (DO), conductivity, turbidity, PH， The oxidation-reduction potential (ORP) and water temperature are six major factors. During the well washing process, the instrument automatically determines that the well washing has reached the standard and provides a prompt.

Tablet APP software:

It refers toGroundwater sampling system control software,The control software is connected to the controller of the groundwater sampling instrument and the portable water quality analyzer via wireless WIFI. It can be sampled with an airbag pump or a submersible pump, and the flow rate can be adjusted. It automatically generates test records containing location, timestamp, and tag information. The sampler and water quality analyzer are seamlessly connected, and real-time online monitoring of water quality parameters is displayed on the APP, automatically determining whether the well flushing meets the standards.

2、 Technical parameters

Airbag pump:
Groundwater controller power supply: AC220W, ≤ 30W (no-load);
Airbag pump: can be quickly disassembled without tools, making it convenient and quick to replace airbags;
Diameter of airbag pump body: not greater than 45mm;
Length of airbag pump body: less than 50cm;

Airbag pump head: not less than 70 meters (standard), can reach a head of 300m or even higher as needed;

Injection method of airbag pump: bottom injection;
Weight of airbag pump: 2kg;
Air bag pump supply pipe: inner diameter 4m, outer diameter 6um, made of PVC material;

Airbag pump outlet pipe: inner diameter 6m, outer diameter 8m, made of PTFE material;

Groundwater sampling controller: power supply: AC220V, maximum power ≤ 350W; Exhaust volume 50L/Min; Noise level: ≤ 60 decibels; Oil content: 0 (sanitary grade air);

The water flow rate of the airbag pump meets the sampling requirements for volatile organic compounds (VOCs) and semi volatile organic compounds (SVOCs) in the "Technical Specification for Groundwater Environmental Monitoring" HJ 164 2020

2. Stainless steel submersible pump:
Power supply: AC220V, maximum power ≤ 450W
Submersible pump head: 70 meters
Submersible pump body diameter: not exceeding 50mm
Submersible pump body length: 70cm
Submersible pump injection method: top injection
Submersible pump outlet pipe: outer diameter 8m
Submersible pump output: 0.1 10L/Min adjustable
Portable power bank: 1500W, can provide 2 channels of AC220W, 1 channel of DCI2V, 2 channels of USB charging ports, can be used for car charging.

3. Water level drop gauge:

Water level depth of 20m, 12V power supply. Record and display the water level at the beginning of sampling, and dynamically display the current water level in real time, and link it with the airbag pump and submersible pump. When the discharge water level is reached, the pump automatically stops and starts automatically after the water level is restored. The water level measurement results are in meters. Write to two decimal places.

4. Water surface detector:Tape measure length 100m

5. Well depth gaugeDetection depth of 100m, accuracy ≤ 6cm; Resolution of 1cm

6.Portable water quality analyzer：Built in WIFI, powered by DC5V

7. Storage: More than 100 data points

8. Operating temperature:-5~50℃

9. Flow tank capacity:350ml

10. Materials:Rigid ethyl carbamate

4、 Technical parameters of sensors
(1) Temperature: 0-50 ℃,accuracy0.1 ℃, resolution 0.01 ℃

(2) Dissolved oxygen DO: 0-20mg/L,accuracy0.1mg/L, resolution 0.01mg/L

(3) Conductivity: 1us/cm~100ms/cm, accuracy 0.01, resolution 0.001

(4)PH: 0~14，accuracyShi 0.1, resolution 0.01

(5) Turbidity: 0~1000NTU; Accuracy 1; Resolution 0.01

(6) 0RP: -999~999mV, accuracy 1mV, resolution 0.01mV