Float Water Level Gauge

Measuring range: 0-2000cm
Maximum water level variability: 60cm / min
Resolution: 0.1cm
Measurement accuracy: ± 2cm (10m range)；When
more than 10 m, ± (2cm ± 0.2% F • S)
Display: LED digital display
Mechanical parameters
Working round: 32cm
Measuring cable: Φ1mm stainless steel cable
Float diameter: To be determined
Output form:
Current output, voltage output, RS485 output three,selected one
RS485 interface: MODBUS protocol
Current type: 4 ∼ 20mA analog signal output
Voltage: 1~5V
Use environment
Ambient temperature: 0 ℃ ∼ 85 ℃
Relative humidity: <90% (40℃)
Size: 132 × 132 × 115
Voltage
Power supply 5 ∼ 20VDC
Rated voltage: 12V Rated current: 90mA Rated power: 1W

Accurate measurement, anti-interference ability

Anti surge patent	Resistance to strong electromagnetic interference	Gray code transmission	Power off memory function
The instrument adopts the national new anti-surge patented technology design, In the surge environment, can effectively prevent the cable between the measuring wheel and slip, so that the instrument stable and reliable work.	Strong electromagnetic interference can interfere with signal transmission on the daily monitoring of adverse effects. Anti-strong electromagnetic interference system is very good to solve this problem, to ensure that data transmission more timely, can continue to work in harsh environment.	Gray code, also known as binary cycle code. Different range of instruments using different lengths of cable can output 1024 to 4096 groups of different coding, can be used to measure 10 to 40 meters water level amplitude, to ensure that the working distance while ensuring the accuracy of transmission.	Power off memory function can save data very well. Coupled with no temperature, zero drift, can be effective to ensure that data in harsh environments can still ensure accurate measurement, and can be very good to save.

The wire harness hole

The hanging cable hole in the float water level meter base, can effectively prevent the passive floating cable and slipping, reduce the external environment caused by the measurement error, to deal with a variety of external harsh environmental conditions.

Use principle

Suspension

Balance hammer

Float

The instrument changes the water level with the float. Under the working condition, the float, the balance hammer are firmly connected with the suspension cable, and the suspension is suspended in the "V" groove of the water level wheel. Balance the hammer from the suspension of the suspension and balance the role of adjusting the weight of the float can make the float work on the normal waterline.
When the water level rises, the float produces upward buoyancy, so that the balance hammer pulls the cable to rotate the water level rotation for clockwise rotation, and the water level encoder displays the reading increase;
When the water level drops, the float sinks and pulls the suspension cable to move the water level wheel counterclockwise to rotate, and the water level encoder's display reading is reduced.

Multipurpose integration

Qingyi float water level gauge is a can be used alone, can also be used with other systems Multi-function linkage using the water level meter.

Used independently

Qingyi float water level meter itself can be used independently of the measurement tool, comes with the LED screen can independently display the measurement depth, can also be transmitted through the 485 code to the LED screen to display real-time depth data.

Automatic water level measurement and reporting system

Installed with RS485 digital communication interface (or 4-20mA) water level gauge, can be directly with the communications machine, computer or the corresponding instrument connected to form a hydrological automatic forecasting system.

Hydrological automatic forecasting system can also measure the dam infiltration line, see the dam water seepage situation.

Online multi-site networking

Instrument built-in RS485 digital communication interface (optional), with location, gating function, to two-way way to send information over long distances, In a pair of twisted pair signal lines can drive or receive multiple water level (or gate) sensor, to achieve online multi-site networking capabilities.

Telemetry network

Qingyi float water level meter can be collected by solar power, GPRS long-distance transmission of signals, transmission of different locations of the water level information, to achieve telemetry network function.

Application areas

Sewage treatment

Provide real-time water level data for wastewater treatment.

Reservoir measurement

The annual data of the diurnal variation of the reservoir water level can be obtained.

Flash flood warning

The telemetry network layout can provide early warning by the data for the occurrence of flash floods and save people's safety and property safety.

Tap water reserves

It Can be efficient and efficient calculation of the water reserve and use.

Tank measurement

Can detect the tank surface height, for the tank safety escort.

Coal mine production

Detection of coal seepage height, to provide reliable support for safe production.

Gate measurement

Check the gate height changes, for the normal use of the gate to provide the corresponding digital basis.

The parison of common water level meters

Now there are three kinds of popular water level gauge, namely, input pressure sensor, float water level meter and ultrasonic water level sensor.

Name	Input pressure sensor	Float water level gauge	Ultrasonic water level sensor
Advantage	Installation is simple, no mechanical action	High precision, no range limit, no water quality requirements, not affected by the weather	Easy installation, non-contact measurement
Disadvantage	High water quality requirements	Mechanical aging, need protection	High environmental requirements, small range

The installation of float water level gauge

The float level meter must be installed in a water level log. The water level log can be constructed from any sturdy and durable material, shape no special requirements. But requires: the cross-sectional area of the well is large enough to put the balance hammer and float from the borehole wall has a certain distance, the lateral well shape will not have a greater impact on the water flow; Well water level and river water level is basically the same; The height and bottom elevation of the water level wells should be able to accommodate the highest and lowest water levels measured. It is recommended to use 500mm caliber PVC pipe.
Install the float telemetry meter on the working platform of the water level. To meet the requirements of the instrument level, and fixed firmly. Put the bucket into the well, the balance hammer from the wall distance should meet the requirements.And then flow meter according to the actual water level or the actual water level after several digits proof water level encoder, And with the detection device to the side of the encoder output of the encoded water level signal, So that it is consistent with the encoder water level and the actual water level display data.

Precautions
Water level platform installed water level meter station or instrument room should be kept ventilated, try to dry, there must be pest control, dust, rodent control facilities.
Note: Float water level gauge package does not contain PVC pipe.